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MySQL PXC構建一個新節點只需IST傳輸的方法(推薦)

編輯：關於MYSQL數據庫

需求場景：原有的pxc環境數據量已經比較大，新買的服務器要加入此集群中，如何讓其用IST的方式傳輸，而不是SST.

PXC傳輸數據有兩種方式：

IST：Incremental State Transfer 增量同步
SST：State Snapshot Transfer 全量同步

IST 發生的條件：This is done using caching mechanism on nodes （即只發生在之前集群裡的節點數據還有在緩存中）

判斷方法：

mysql> show global status like 'wsrep_local_cached_downto';
+---------------------------+-------+
| Variable_name       | Value |
+---------------------------+-------+
| wsrep_local_cached_downto | 1   |
+---------------------------+-------+
1 row in set (0.00 sec)

此值小於新開節點的seqno：

[root@zejin241 I6000]# cat grastate.dat 
# GALERA saved state
version: 2.1
uuid:  6c86dc17-246f-11e6-9955-ae4d7e89eed2
seqno:  4
cert_index:

所以我們的思路即通過備份一個集群中節點的數據，恢復到新節點上，並偽造一個grastate.dat，來記錄備份數據的seqno,這樣當新節點啟動時就會自動用IST的方法來進行，而不是SST（注意gcache.size應該有足夠的容量來保證在備份及恢復這段時間內新產生的數據都被緩存到）

galera.cache: This file is used as a main writeset store. It's implemented as a permanent ring-buffer file
that is preallocated on disk when the node is initialized. File size can be controlled with the variable
gcache.size. If this value is bigger, more writesets are cached and chances are better that the rejoining node will get IST instead of SST. Filename can be changed with the gcache.name variable.

如下為這次的操作步驟：

node240：192.168.1.240 --已經存在的集群節點
node241：192.168.1.241 --將要加入的集群節點

step1：啟動新的集群中的第一個節點

/usr/local/pxc_56/bin/mysqld_safe --defaults-file=/home/mysql/pxc6000.cnf --ledir=/usr/local/pxc_56/bin/ --wsrep-new-cluster &

配置文件如下：

[root@zejin240 I6000]# cat /home/mysql/pxc6000.cnf[client]port      = 6000socket     = /home/mysql/I6000/mysql.sockdefault-character-set=utf8[mysqld]basedir = /usr/local/pxc_56datadir = /home/mysql/I6000pid-file    = /home/mysql/I6000/mysql.pidcharacter-set-server=utf8init_connect = 'SET NAMES utf8'log-bin=/home/mysql/I6000/log_binserver-id = 9816000innodb_buffer_pool_size = 100Minnodb_data_file_path = ibdata1:10M:autoextendinnodb_data_home_dir = /home/mysql/I6000innodb_file_per_table=1skip-name-resolveport      = 6000socket     = /home/mysql/I6000/mysql.sockuser=mysqllog_error=/home/mysql/I6000/mysql_error.log#pxcuser=mysqllog_error=error.logbinlog_format=ROW#6000 for mysqld port, 6020 for sst port, 6031 for ist port, 6030 for cluster communication portwsrep_cluster_address='gcomm://192.168.1.240:6030,192.168.1.241:6030,192.168.1.242:6030'wsrep_provider=/usr/local/pxc_56/lib/libgalera_smm.sowsrep_sst_receive_address=192.168.1.240:6020wsrep_node_incoming_address=192.168.1.240:6000wsrep_node_address=192.168.1.240:6000wsrep_provider_options = "gmcast.listen_addr=tcp://192.168.1.240:6030;ist.recv_addr=192.168.1.240:6031;"wsrep_slave_threads=2wsrep_cluster_name=pxc_zejinwsrep_sst_method=xtrabackup-v2wsrep_node_name=node6000_240innodb_autoinc_lock_mode=2wsrep_sst_auth="sstuser:123"log-slave-updates[mysql]no-auto-rehashdefault-character-set=utf8

連接進去並創造更改一些數據：

mysql> use zejin;mysql> select * from t1;+----+-------+| id | name |+----+-------+| 1 | chen || 2 | li  || 3 | zhang |+----+-------+3 rows in set (0.01 sec)mysql> update mysql.user set password=password('123');mysql> flush privileges;
mysql> show master status;+----------------+----------+--------------+------------------+-------------------+| File      | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |+----------------+----------+--------------+------------------+-------------------+| log_bin.000003 |   2772 |       |         |          |+----------------+----------+--------------+------------------+-------------------+1 row in set (0.00 sec)

step2：用innobackupex備份node240數據：

[root@zejin240 mysql]# innobackupex --user=root --password=123 --port=6000 --host=127.0.0.1 --defaults-file=/home/mysql/pxc6000.cnf /home/mysql/InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oyand Percona LLC and/or its affiliates 2009-2013. All Rights Reserved.This software is published underthe GNU GENERAL PUBLIC LICENSE Version 2, June 1991.Get the latest version of Percona XtraBackup, documentation, and help resources:http://www.percona.com/xb/p160528 09:39:07 innobackupex: Executing a version check against the server...160528 09:39:07 innobackupex: Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_file=/home/mysql/pxc6000.cnf;mysql_read_default_group=xtrabackup;host=127.0.0.1;port=6000' as 'root' (using password: YES).160528 09:39:07 innobackupex: Connected to MySQL server160528 09:39:07 innobackupex: Done.160528 09:39:07 innobackupex: Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_file=/home/mysql/pxc6000.cnf;mysql_read_default_group=xtrabackup;host=127.0.0.1;port=6000' as 'root' (using password: YES).160528 09:39:07 innobackupex: Connected to MySQL server160528 09:39:07 innobackupex: Starting the backup operationIMPORTANT: Please check that the backup run completes successfully.      At the end of a successful backup run innobackupex      prints "completed OK!".innobackupex: Using server version 5.6.26-74.0-25.12-loginnobackupex: Created backup directory /home/mysql/2016-05-28_09-39-07160528 09:39:07 innobackupex: Starting ibbackup with command: xtrabackup --defaults-file="/home/mysql/pxc6000.cnf" --defaults-group="mysqld" --backup --suspend-at-end --target-dir=/home/mysql/2016-05-28_09-39-07 --innodb_log_file_size="50331648" --tmpdir=/tmp --extra-lsndir='/tmp'innobackupex: Waiting for ibbackup (pid=30280) to suspendinnobackupex: Suspend file '/home/mysql/2016-05-28_09-39-07/xtrabackup_suspended_2'xtrabackup version 2.2.11 based on MySQL server 5.6.24 Linux (x86_64) (revision id: )xtrabackup: uses posix_fadvise().xtrabackup: cd to /home/mysql/I6000xtrabackup: open files limit requested 0, set to 1024xtrabackup: using the following InnoDB configuration:xtrabackup:  innodb_data_home_dir = /home/mysql/I6000xtrabackup:  innodb_data_file_path = ibdata1:10M:autoextendxtrabackup:  innodb_log_group_home_dir = ./xtrabackup:  innodb_log_files_in_group = 2xtrabackup:  innodb_log_file_size = 50331648>> log scanned up to (1637591)xtrabackup: Generating a list of tablespaces[01] Copying /home/mysql/I6000/ibdata1 to /home/mysql/2016-05-28_09-39-07/ibdata1>> log scanned up to (1637591)[01]    ...done[01] Copying ./zejin/t1.ibd to /home/mysql/2016-05-28_09-39-07/zejin/t1.ibd[01]    ...done[01] Copying ./mysql/innodb_table_stats.ibd to /home/mysql/2016-05-28_09-39-07/mysql/innodb_table_stats.ibd[01]    ...done[01] Copying ./mysql/slave_master_info.ibd to /home/mysql/2016-05-28_09-39-07/mysql/slave_master_info.ibd[01]    ...done[01] Copying ./mysql/slave_relay_log_info.ibd to /home/mysql/2016-05-28_09-39-07/mysql/slave_relay_log_info.ibd[01]    ...done[01] Copying ./mysql/slave_worker_info.ibd to /home/mysql/2016-05-28_09-39-07/mysql/slave_worker_info.ibd[01]    ...done[01] Copying ./mysql/innodb_index_stats.ibd to /home/mysql/2016-05-28_09-39-07/mysql/innodb_index_stats.ibd[01]    ...done>> log scanned up to (1637591)xtrabackup: Creating suspend file '/home/mysql/2016-05-28_09-39-07/xtrabackup_suspended_2' with pid '30280'160528 09:39:10 innobackupex: Continuing after ibbackup has suspended160528 09:39:10 innobackupex: Executing LOCK TABLES FOR BACKUP...160528 09:39:10 innobackupex: Backup tables lock acquired160528 09:39:10 innobackupex: Starting to backup non-InnoDB tables and filesinnobackupex: in subdirectories of '/home/mysql/I6000/'innobackupex: Backing up files '/home/mysql/I6000//performance_schema/*.{frm,isl,MYD,MYI,MAD,MAI,MRG,TRG,TRN,ARM,ARZ,CSM,CSV,opt,par}' (53 files)>> log scanned up to (1637598)innobackupex: Backing up file '/home/mysql/I6000//zejin/db.opt'innobackupex: Backing up file '/home/mysql/I6000//zejin/t1.frm'innobackupex: Backing up files '/home/mysql/I6000//mysql/*.{frm,isl,MYD,MYI,MAD,MAI,MRG,TRG,TRN,ARM,ARZ,CSM,CSV,opt,par}' (74 files)160528 09:39:11 innobackupex: Finished backing up non-InnoDB tables and files160528 09:39:11 innobackupex: Executing LOCK BINLOG FOR BACKUP...160528 09:39:11 innobackupex: Executing FLUSH NO_WRITE_TO_BINLOG ENGINE LOGS...160528 09:39:11 innobackupex: Waiting for log copying to finishxtrabackup: The latest check point (for incremental): '1637598'xtrabackup: Stopping log copying thread..>> log scanned up to (1637598)xtrabackup: Creating suspend file '/home/mysql/2016-05-28_09-39-07/xtrabackup_log_copied' with pid '30280'xtrabackup: Transaction log of lsn (1637591) to (1637598) was copied.160528 09:39:12 innobackupex: Executing UNLOCK BINLOG160528 09:39:12 innobackupex: Executing UNLOCK TABLES160528 09:39:12 innobackupex: All tables unlockedinnobackupex: Backup created in directory '/home/mysql/2016-05-28_09-39-07'innobackupex: MySQL binlog position: filename 'log_bin.000003', position 2772160528 09:39:12 innobackupex: Connection to database server closed160528 09:39:12 innobackupex: completed OK!
[root@zejin240 2016-05-28_09-39-07]# lltotal 75812-rw-r--r--. 1 root root   358 May 28 09:39 backup-my.cnf-rw-r-----. 1 root root 77594624 May 28 09:39 ibdata1drwx------. 2 root root   4096 May 28 09:39 mysqldrwxr-xr-x. 2 root root   4096 May 28 09:39 performance_schema-rw-r--r--. 1 root root    20 May 28 09:39 xtrabackup_binlog_info-rw-r-----. 1 root root    89 May 28 09:39 xtrabackup_checkpoints-rw-r--r--. 1 root root   635 May 28 09:39 xtrabackup_info-rw-r-----. 1 root root   2560 May 28 09:39 xtrabackup_logfiledrwx------. 2 root root   4096 May 28 09:39 zejin

step3：此時我們在node240上再加入一些數據：

此時我們再在node240上插入一些數據：mysql> use zejin;mysql> insert into t1(name) values('lin');Query OK, 1 row affected (0.06 sec)mysql> insert into t1(name) values('liang');Query OK, 1 row affected (0.00 sec)mysql> select * from t1;+----+-------+| id | name |+----+-------+| 1 | chen || 2 | li  || 3 | zhang || 4 | lin  || 5 | liang |+----+-------+5 rows in set (0.00 sec)

step4：將備份的數據傳輸到node241上並恢復：

[root@zejin241 mysql]# innobackupex --apply-log 2016-05-28_09-39-07/InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oyand Percona LLC and/or its affiliates 2009-2013. All Rights Reserved.This software is published underthe GNU GENERAL PUBLIC LICENSE Version 2, June 1991.Get the latest version of Percona XtraBackup, documentation, and help resources:http://www.percona.com/xb/p160528 09:54:01 innobackupex: Starting the apply-log operationIMPORTANT: Please check that the apply-log run completes successfully.      At the end of a successful apply-log run innobackupex      prints "completed OK!".160528 09:54:01 innobackupex: Starting ibbackup with command: xtrabackup --defaults-file="/home/mysql/2016-05-28_09-39-07/backup-my.cnf" --defaults-group="mysqld" --prepare --target-dir=/home/mysql/2016-05-28_09-39-07xtrabackup version 2.2.11 based on MySQL server 5.6.24 Linux (x86_64) (revision id: )xtrabackup: cd to /home/mysql/2016-05-28_09-39-07xtrabackup: This target seems to be not prepared yet.xtrabackup: xtrabackup_logfile detected: size=2097152, start_lsn=(1637591)xtrabackup: using the following InnoDB configuration for recovery:xtrabackup:  innodb_data_home_dir = ./xtrabackup:  innodb_data_file_path = ibdata1:10M:autoextendxtrabackup:  innodb_log_group_home_dir = ./xtrabackup:  innodb_log_files_in_group = 1xtrabackup:  innodb_log_file_size = 2097152xtrabackup: using the following InnoDB configuration for recovery:xtrabackup:  innodb_data_home_dir = ./xtrabackup:  innodb_data_file_path = ibdata1:10M:autoextendxtrabackup:  innodb_log_group_home_dir = ./xtrabackup:  innodb_log_files_in_group = 1xtrabackup:  innodb_log_file_size = 2097152xtrabackup: Starting InnoDB instance for recovery.xtrabackup: Using 104857600 bytes for buffer pool (set by --use-memory parameter)InnoDB: Using atomics to ref count buffer pool pagesInnoDB: The InnoDB memory heap is disabledInnoDB: Mutexes and rw_locks use GCC atomic builtinsInnoDB: Memory barrier is not usedInnoDB: Compressed tables use zlib 1.2.3InnoDB: Using CPU crc32 instructionsInnoDB: Initializing buffer pool, size = 100.0MInnoDB: Completed initialization of buffer poolInnoDB: Highest supported file format is Barracuda.InnoDB: Log scan progressed past the checkpoint lsn 1637591InnoDB: Database was not shutdown normally!InnoDB: Starting crash recovery.InnoDB: Reading tablespace information from the .ibd files...InnoDB: Restoring possible half-written data pages InnoDB: from the doublewrite buffer...InnoDB: Doing recovery: scanned up to log sequence number 1637598 (0%)InnoDB: Last MySQL binlog file position 0 2772, file name log_bin.000003InnoDB: 128 rollback segment(s) are active.InnoDB: Waiting for purge to startInnoDB: 5.6.24 started; log sequence number 1637598[notice (again)] If you use binary log and don't use any hack of group commit, the binary log position seems to be:InnoDB: Last MySQL binlog file position 0 2772, file name log_bin.000003xtrabackup: Recovered WSREP position: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:8xtrabackup: starting shutdown with innodb_fast_shutdown = 1InnoDB: FTS optimize thread exiting.InnoDB: Starting shutdown...InnoDB: Shutdown completed; log sequence number 1637608160528 09:54:03 innobackupex: Restarting xtrabackup with command: xtrabackup --defaults-file="/home/mysql/2016-05-28_09-39-07/backup-my.cnf" --defaults-group="mysqld" --prepare --target-dir=/home/mysql/2016-05-28_09-39-07for creating ib_logfile*xtrabackup version 2.2.11 based on MySQL server 5.6.24 Linux (x86_64) (revision id: )xtrabackup: cd to /home/mysql/2016-05-28_09-39-07xtrabackup: This target seems to be already prepared.xtrabackup: notice: xtrabackup_logfile was already used to '--prepare'.xtrabackup: using the following InnoDB configuration for recovery:xtrabackup:  innodb_data_home_dir = ./xtrabackup:  innodb_data_file_path = ibdata1:10M:autoextendxtrabackup:  innodb_log_group_home_dir = ./xtrabackup:  innodb_log_files_in_group = 2xtrabackup:  innodb_log_file_size = 50331648xtrabackup: using the following InnoDB configuration for recovery:xtrabackup:  innodb_data_home_dir = ./xtrabackup:  innodb_data_file_path = ibdata1:10M:autoextendxtrabackup:  innodb_log_group_home_dir = ./xtrabackup:  innodb_log_files_in_group = 2xtrabackup:  innodb_log_file_size = 50331648xtrabackup: Starting InnoDB instance for recovery.xtrabackup: Using 104857600 bytes for buffer pool (set by --use-memory parameter)InnoDB: Using atomics to ref count buffer pool pagesInnoDB: The InnoDB memory heap is disabledInnoDB: Mutexes and rw_locks use GCC atomic builtinsInnoDB: Memory barrier is not usedInnoDB: Compressed tables use zlib 1.2.3InnoDB: Using CPU crc32 instructionsInnoDB: Initializing buffer pool, size = 100.0MInnoDB: Completed initialization of buffer poolInnoDB: Setting log file ./ib_logfile101 size to 48 MBInnoDB: Setting log file ./ib_logfile1 size to 48 MBInnoDB: Renaming log file ./ib_logfile101 to ./ib_logfile0InnoDB: New log files created, LSN=1637608InnoDB: Highest supported file format is Barracuda.InnoDB: 128 rollback segment(s) are active.InnoDB: Waiting for purge to startInnoDB: 5.6.24 started; log sequence number 1637900[notice (again)] If you use binary log and don't use any hack of group commit, the binary log position seems to be:InnoDB: Last MySQL binlog file position 0 2772, file name log_bin.000003xtrabackup: starting shutdown with innodb_fast_shutdown = 1InnoDB: FTS optimize thread exiting.InnoDB: Starting shutdown...InnoDB: Shutdown completed; log sequence number 1637910160528 09:54:06 innobackupex: completed OK!
[root@zejin240 2016-05-28_09-39-07]# lltotal 176168-rw-r--r--. 1 root root   358 May 28 09:39 backup-my.cnf-rw-r-----. 1 root root 77594624 May 28 09:54 ibdata1-rw-r--r--. 1 root root 50331648 May 28 09:54 ib_logfile0-rw-r--r--. 1 root root 50331648 May 28 09:54 ib_logfile1drwx------. 2 root root   4096 May 28 09:39 mysqldrwxr-xr-x. 2 root root   4096 May 28 09:39 performance_schema-rw-r--r--. 1 root root    20 May 28 09:39 xtrabackup_binlog_info-rw-r--r--. 1 root root    20 May 28 09:54 xtrabackup_binlog_pos_innodb-rw-r-----. 1 root root    89 May 28 09:54 xtrabackup_checkpoints-rw-r--r--. 1 root root    38 May 28 09:54 xtrabackup_galera_info-rw-r--r--. 1 root root   635 May 28 09:39 xtrabackup_info-rw-r-----. 1 root root 2097152 May 28 09:54 xtrabackup_logfiledrwx------. 2 root root   4096 May 28 09:39 zejin

step5：找出Xid的位置

有兩種方法

方法一：查看文件xtrabackup_galera_info

[root@zejin241 I6000]# cat xtrabackup_galera_info6c86dc17-246f-11e6-9955-ae4d7e89eed2:8

方法二：通過binlog位置來查找：

[root@zejin241 I6000]# cat xtrabackup_binlog_infolog_bin.000003 2772
即備份時的備份點位置為log_bin.000003 2772

我們再去主庫查找此binlog對應的xid

[root@zejin240 I6000]# mysqlbinlog -vv log_bin.000003 | grep Xid#160528 9:02:59 server id 9816000 end_log_pos 947 CRC32 0x37371b3e Xid = 7#160528 10:03:04 server id 9816000 end_log_pos 2969 CRC32 0xf7973829 Xid = 9#160528 10:03:13 server id 9816000 end_log_pos 3168 CRC32 0x8db2aa41 Xid = 10

發現竟然沒有此位置的xid，原因在於我們在最上面更新mysql.user表了，而此表是myisam表，不會有Xid的記錄，這種情況時我們根據上下位置把Xid設置為8

step6：在node241上偽造一個grastate.dat文件（從node240上復制過來，更改下seqno即可）：

# GALERA saved stateversion: 2.1uuid: 6c86dc17-246f-11e6-9955-ae4d7e89eed2seqno: 8cert_index:

step7：啟動新節點：

啟動node241:[root@zejin241 mysql]# /usr/local/pxc_56/bin/mysqld_safe --defaults-file=/home/mysql/pxc6000.cnf --ledir=/usr/local/pxc_56/bin/ & [1] 56425[root@zejin241 mysql]# 160528 11:06:03 mysqld_safe Logging to '/home/mysql/I6000/error.log'.160528 11:06:03 mysqld_safe Starting mysqld daemon with databases from /home/mysql/I6000160528 11:06:03 mysqld_safe Skipping wsrep-recover for 6c86dc17-246f-11e6-9955-ae4d7e89eed2:8 pair160528 11:06:03 mysqld_safe Assigning 6c86dc17-246f-11e6-9955-ae4d7e89eed2:8 to wsrep_start_position查看下啟動過程的日志：[root@zejin241 I6000]# cat error.log 160528 11:06:03 mysqld_safe Starting mysqld daemon with databases from /home/mysql/I6000160528 11:06:03 mysqld_safe Skipping wsrep-recover for 6c86dc17-246f-11e6-9955-ae4d7e89eed2:8 pair160528 11:06:03 mysqld_safe Assigning 6c86dc17-246f-11e6-9955-ae4d7e89eed2:8 to wsrep_start_position2016-05-28 11:06:19 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).2016-05-28 11:06:19 0 [Note] /usr/local/pxc_56/bin//mysqld (mysqld 5.6.26-74.0-25.12-log) starting as process 56931 ...2016-05-28 11:06:19 56931 [Note] WSREP: Read nil XID from storage engines, skipping position init2016-05-28 11:06:19 56931 [Note] WSREP: wsrep_load(): loading provider library '/usr/local/pxc_56/lib/libgalera_smm.so'2016-05-28 11:06:20 56931 [Note] WSREP: wsrep_load(): Galera 3.12.2(rf3e626d) by Codership Oy <[email protected]> loaded successfully.2016-05-28 11:06:20 56931 [Note] WSREP: CRC-32C: using hardware acceleration.2016-05-28 11:06:20 56931 [Note] WSREP: Found saved state: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:82016-05-28 11:06:20 56931 [Note] WSREP: Passing config to GCS: base_dir = /home/mysql/I6000/; base_host = 192.168.1.241; base_port = 6000; cert.log_conflicts = no; debug = no; evs.auto_evict = 0; evs.delay_margin = PT1S; evs.delayed_keep_period = PT30S; evs.inactive_check_period = PT0.5S; evs.inactive_timeout = PT15S; evs.join_retrans_period = PT1S; evs.max_install_timeouts = 3; evs.send_window = 4; evs.stats_report_period = PT1M; evs.suspect_timeout = PT5S; evs.user_send_window = 2; evs.view_forget_timeout = PT24H; gcache.dir = /home/mysql/I6000/; gcache.keep_pages_count = 0; gcache.keep_pages_size = 0; gcache.mem_size = 0; gcache.name = /home/mysql/I6000//galera.cache; gcache.page_size = 128M; gcache.size = 128M; gcs.fc_debug = 0; gcs.fc_factor = 1.0; gcs.fc_limit = 16; gcs.fc_master_slave = no; gcs.max_packet_size = 64500; gcs.max_throttle = 0.25; gcs.recv_q_hard_limit = 9223372036854775807; gcs.recv_q_soft_limit = 0.25; gcs.sync_donor = no; gmcast.listen_addr = tcp://192.168.1.241:6030; gmcast.segment = 0; gmcast.version = 0; ist.recv_a2016-05-28 11:06:21 56931 [Note] WSREP: Service thread queue flushed.2016-05-28 11:06:21 56931 [Note] WSREP: Assign initial position for certification: 8, protocol version: -12016-05-28 11:06:21 56931 [Note] WSREP: wsrep_sst_grab()2016-05-28 11:06:21 56931 [Note] WSREP: Start replication2016-05-28 11:06:21 56931 [Note] WSREP: Setting initial position to 6c86dc17-246f-11e6-9955-ae4d7e89eed2:82016-05-28 11:06:21 56931 [Note] WSREP: protonet asio version 02016-05-28 11:06:21 56931 [Note] WSREP: Using CRC-32C for message checksums.2016-05-28 11:06:21 56931 [Note] WSREP: backend: asio2016-05-28 11:06:21 56931 [Warning] WSREP: access file(/home/mysql/I6000//gvwstate.dat) failed(No such file or directory)2016-05-28 11:06:21 56931 [Note] WSREP: restore pc from disk failed2016-05-28 11:06:21 56931 [Note] WSREP: GMCast version 02016-05-28 11:06:21 56931 [Note] WSREP: (275a2ebd, 'tcp://192.168.1.241:6030') listening at tcp://192.168.1.241:60302016-05-28 11:06:21 56931 [Note] WSREP: (275a2ebd, 'tcp://192.168.1.241:6030') multicast: , ttl: 12016-05-28 11:06:21 56931 [Note] WSREP: EVS version 02016-05-28 11:06:21 56931 [Note] WSREP: gcomm: connecting to group 'pxc_zejin', peer '192.168.1.240:6030,192.168.1.241:6030,192.168.1.242:6030'2016-05-28 11:06:21 56931 [Note] WSREP: (275a2ebd, 'tcp://192.168.1.241:6030') turning message relay requesting on, nonlive peers: 2016-05-28 11:06:21 56931 [Note] WSREP: declaring 6c48c86c at tcp://192.168.1.240:6030 stable2016-05-28 11:06:21 56931 [Note] WSREP: Node 6c48c86c state prim2016-05-28 11:06:21 56931 [Note] WSREP: view(view_id(PRIM,275a2ebd,2) memb {  275a2ebd,0  6c48c86c,0} joined {} left {} partitioned {})2016-05-28 11:06:21 56931 [Note] WSREP: save pc into disk2016-05-28 11:06:21 56931 [Note] WSREP: discarding pending addr without UUID: tcp://192.168.1.242:60302016-05-28 11:06:22 56931 [Note] WSREP: gcomm: connected2016-05-28 11:06:22 56931 [Note] WSREP: Changing maximum packet size to 64500, resulting msg size: 326362016-05-28 11:06:22 56931 [Note] WSREP: Shifting CLOSED -> OPEN (TO: 0)2016-05-28 11:06:22 56931 [Note] WSREP: Opened channel 'pxc_zejin'2016-05-28 11:06:22 56931 [Note] WSREP: Waiting for SST to complete.2016-05-28 11:06:22 56931 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 0, memb_num = 22016-05-28 11:06:22 56931 [Note] WSREP: STATE_EXCHANGE: sent state UUID: 2800468f-2481-11e6-8c7c-de1ade51709a2016-05-28 11:06:22 56931 [Note] WSREP: STATE EXCHANGE: sent state msg: 2800468f-2481-11e6-8c7c-de1ade51709a2016-05-28 11:06:22 56931 [Note] WSREP: STATE EXCHANGE: got state msg: 2800468f-2481-11e6-8c7c-de1ade51709a from 0 (node6000_241)2016-05-28 11:06:22 56931 [Note] WSREP: STATE EXCHANGE: got state msg: 2800468f-2481-11e6-8c7c-de1ade51709a from 1 (node6000_240)2016-05-28 11:06:22 56931 [Note] WSREP: Quorum results:  version  = 3,  component = PRIMARY,  conf_id  = 1,  members  = 1/2 (joined/total),  act_id   = 10,  last_appl. = -1,  protocols = 0/7/3 (gcs/repl/appl),  group UUID = 6c86dc17-246f-11e6-9955-ae4d7e89eed22016-05-28 11:06:22 56931 [Note] WSREP: Flow-control interval: [23, 23]2016-05-28 11:06:22 56931 [Note] WSREP: Shifting OPEN -> PRIMARY (TO: 10)2016-05-28 11:06:22 56931 [Note] WSREP: State transfer required:   Group state: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:10  Local state: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:82016-05-28 11:06:22 56931 [Note] WSREP: New cluster view: global state: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:10, view# 2: Primary, number of nodes: 2, my index: 0, protocol version 32016-05-28 11:06:22 56931 [Warning] WSREP: Gap in state sequence. Need state transfer.2016-05-28 11:06:22 56931 [Note] WSREP: Running: 'wsrep_sst_xtrabackup-v2 --role 'joiner' --address '192.168.1.241:6020' --datadir '/home/mysql/I6000/' --defaults-file '/home/mysql/pxc6000.cnf' --defaults-group-suffix '' --parent '56931' '' '2016-05-28 11:06:24 56931 [Note] WSREP: (275a2ebd, 'tcp://192.168.1.241:6030') turning message relay requesting offWSREP_SST: [INFO] Streaming with xbstream (20160528 11:06:25.322)WSREP_SST: [INFO] Using socat as streamer (20160528 11:06:25.324)WSREP_SST: [INFO] Evaluating timeout -s9 100 socat -u TCP-LISTEN:6020,reuseaddr stdio | xbstream -x; RC=( ${PIPESTATUS[@]} ) (20160528 11:06:25.891)2016-05-28 11:06:27 56931 [Note] WSREP: Prepared SST request: xtrabackup-v2|192.168.1.241:6020/xtrabackup_sst//12016-05-28 11:06:27 56931 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.2016-05-28 11:06:27 56931 [Note] WSREP: REPL Protocols: 7 (3, 2)2016-05-28 11:06:27 56931 [Note] WSREP: Service thread queue flushed.2016-05-28 11:06:27 56931 [Note] WSREP: Assign initial position for certification: 10, protocol version: 32016-05-28 11:06:27 56931 [Note] WSREP: Service thread queue flushed.2016-05-28 11:06:27 56931 [Note] WSREP: Prepared IST receiver, listening at: tcp://192.168.1.241:60312016-05-28 11:06:27 56931 [Note] WSREP: Member 0.0 (node6000_241) requested state transfer from '*any*'. Selected 1.0 (node6000_240)(SYNCED) as donor.2016-05-28 11:06:27 56931 [Note] WSREP: Shifting PRIMARY -> JOINER (TO: 10)2016-05-28 11:06:27 56931 [Note] WSREP: Requesting state transfer: success, donor: 12016-05-28 11:06:31 56931 [Note] WSREP: 1.0 (node6000_240): State transfer to 0.0 (node6000_241) complete.2016-05-28 11:06:31 56931 [Note] WSREP: Member 1.0 (node6000_240) synced with group.WSREP_SST: [INFO] xtrabackup_ist received from donor: Running IST (20160528 11:06:31.257)WSREP_SST: [INFO] Galera co-ords from recovery: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:8 (20160528 11:06:31.261)WSREP_SST: [INFO] Total time on joiner: 0 seconds (20160528 11:06:31.265)WSREP_SST: [INFO] Removing the sst_in_progress file (20160528 11:06:31.268)2016-05-28 11:06:31 56931 [Note] WSREP: SST complete, seqno: 82016-05-28 11:06:31 56931 [Note] Plugin 'FEDERATED' is disabled.2016-05-28 11:06:31 56931 [Note] InnoDB: Using atomics to ref count buffer pool pages2016-05-28 11:06:31 56931 [Note] InnoDB: The InnoDB memory heap is disabled2016-05-28 11:06:31 56931 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins2016-05-28 11:06:31 56931 [Note] InnoDB: Memory barrier is not used2016-05-28 11:06:31 56931 [Note] InnoDB: Compressed tables use zlib 1.2.32016-05-28 11:06:31 56931 [Note] InnoDB: Using Linux native AIO2016-05-28 11:06:31 56931 [Note] InnoDB: Using CPU crc32 instructions2016-05-28 11:06:31 56931 [Note] InnoDB: Initializing buffer pool, size = 100.0M2016-05-28 11:06:31 56931 [Note] InnoDB: Completed initialization of buffer pool2016-05-28 11:06:32 56931 [Note] InnoDB: Highest supported file format is Barracuda.2016-05-28 11:06:32 56931 [Note] InnoDB: 128 rollback segment(s) are active.2016-05-28 11:06:32 56931 [Note] InnoDB: Waiting for purge to start2016-05-28 11:06:33 56931 [Note] InnoDB: Percona XtraDB (http://www.percona.com) 5.6.26-74.0 started; log sequence number 16379102016-05-28 11:06:33 56931 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 2e7b3e12-2481-11e6-8fe4-000c2973aa48.2016-05-28 11:06:33 56931 [Note] RSA private key file not found: /home/mysql/I6000//private_key.pem. Some authentication plugins will not work.2016-05-28 11:06:33 56931 [Note] RSA public key file not found: /home/mysql/I6000//public_key.pem. Some authentication plugins will not work.2016-05-28 11:06:33 56931 [Note] Server hostname (bind-address): '*'; port: 60002016-05-28 11:06:33 56931 [Note] IPv6 is available.2016-05-28 11:06:33 56931 [Note]  - '::' resolves to '::';2016-05-28 11:06:33 56931 [Note] Server socket created on IP: '::'.2016-05-28 11:06:33 56931 [Warning] 'user' entry 'root@zejin240' ignored in --skip-name-resolve mode.2016-05-28 11:06:33 56931 [Warning] 'user' entry '@zejin240' ignored in --skip-name-resolve mode.2016-05-28 11:06:33 56931 [Warning] 'proxies_priv' entry '@ root@zejin240' ignored in --skip-name-resolve mode.2016-05-28 11:06:33 56931 [Note] Event Scheduler: Loaded 0 events2016-05-28 11:06:33 56931 [Note] WSREP: Signalling provider to continue.2016-05-28 11:06:33 56931 [Note] WSREP: Initialized wsrep sidno 22016-05-28 11:06:33 56931 [Note] WSREP: SST received: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:82016-05-28 11:06:33 56931 [Note] WSREP: Receiving IST: 2 writesets, seqnos 8-102016-05-28 11:06:33 56931 [Note] /usr/local/pxc_56/bin//mysqld: ready for connections.Version: '5.6.26-74.0-25.12-log' socket: '/home/mysql/I6000/mysql.sock' port: 6000 Percona XtraDB Cluster binary (GPL) 5.6.26-25.12, Revision 624ef81, wsrep_25.122016-05-28 11:06:33 56931 [Note] WSREP: IST received: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:102016-05-28 11:06:33 56931 [Note] WSREP: 0.0 (node6000_241): State transfer from 1.0 (node6000_240) complete.2016-05-28 11:06:33 56931 [Note] WSREP: Shifting JOINER -> JOINED (TO: 10)2016-05-28 11:06:33 56931 [Note] WSREP: Member 0.0 (node6000_241) synced with group.2016-05-28 11:06:33 56931 [Note] WSREP: Shifting JOINED -> SYNCED (TO: 10)2016-05-28 11:06:33 56931 [Note] WSREP: Synchronized with group, ready for connections2016-05-28 11:06:33 56931 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.

成功用IST來恢復了。

step8 登陸新節點node241，查看數據是否正常：

[root@zejin241 I6000]# /usr/local/pxc_56/bin/mysql -uroot -p -h127.0.0.1 -P6000Enter password: Welcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 4Server version: 5.6.26-74.0-25.12-log Percona XtraDB Cluster binary (GPL) 5.6.26-25.12, Revision 624ef81, wsrep_25.12Copyright (c) 2009-2015 Percona LLC and/or its affiliatesCopyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> show databases;+--------------------+| Database      |+--------------------+| information_schema || mysql       || performance_schema || zejin       |+--------------------+4 rows in set (0.12 sec)mysql> use zejin;Reading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changedmysql> select * from t1;+----+-------+| id | name |+----+-------+| 1 | chen || 2 | li  || 3 | zhang || 4 | lin  || 5 | liang |+----+-------+5 rows in set (0.01 sec)

發現數據也已經全部同步完成。

step9：對比SST時的日志輸出：

在數據復制到node241上我們不進行偽造grastate.dat操作，直接啟動節點node241
[root@zejin241 I6000]# /usr/local/pxc_56/bin/mysqld_safe --defaults-file=/home/mysql/pxc6000.cnf --ledir=/usr/local/pxc_56/bin &[1] 3861[root@zejin241 I6000]# 160528 15:32:57 mysqld_safe Logging to '/home/mysql/I6000/error.log'.160528 15:32:57 mysqld_safe Starting mysqld daemon with databases from /home/mysql/I6000160528 15:32:57 mysqld_safe Skipping wsrep-recover for empty datadir: /home/mysql/I6000160528 15:32:57 mysqld_safe Assigning 00000000-0000-0000-0000-000000000000:-1 to wsrep_start_position查看錯誤日志：[root@zejin241 I6000]# cat error.log 160528 15:32:57 mysqld_safe Starting mysqld daemon with databases from /home/mysql/I6000160528 15:32:57 mysqld_safe Skipping wsrep-recover for empty datadir: /home/mysql/I6000160528 15:32:57 mysqld_safe Assigning 00000000-0000-0000-0000-000000000000:-1 to wsrep_start_position2016-05-28 15:32:58 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).2016-05-28 15:32:58 0 [Note] /usr/local/pxc_56/bin/mysqld (mysqld 5.6.26-74.0-25.12-log) starting as process 4359 ...2016-05-28 15:32:58 4359 [Note] WSREP: Read nil XID from storage engines, skipping position init2016-05-28 15:32:58 4359 [Note] WSREP: wsrep_load(): loading provider library '/usr/local/pxc_56/lib/libgalera_smm.so'2016-05-28 15:32:58 4359 [Note] WSREP: wsrep_load(): Galera 3.12.2(rf3e626d) by Codership Oy <[email protected]> loaded successfully.2016-05-28 15:32:58 4359 [Note] WSREP: CRC-32C: using hardware acceleration.2016-05-28 15:32:58 4359 [Warning] WSREP: Could not open state file for reading: '/home/mysql/I6000//grastate.dat'2016-05-28 15:32:58 4359 [Note] WSREP: Found saved state: 00000000-0000-0000-0000-000000000000:-12016-05-28 15:32:58 4359 [Note] WSREP: Passing config to GCS: base_dir = /home/mysql/I6000/; base_host = 192.168.1.241; base_port = 6000; cert.log_conflicts = no; debug = no; evs.auto_evict = 0; evs.delay_margin = PT1S; evs.delayed_keep_period = PT30S; evs.inactive_check_period = PT0.5S; evs.inactive_timeout = PT15S; evs.join_retrans_period = PT1S; evs.max_install_timeouts = 3; evs.send_window = 4; evs.stats_report_period = PT1M; evs.suspect_timeout = PT5S; evs.user_send_window = 2; evs.view_forget_timeout = PT24H; gcache.dir = /home/mysql/I6000/; gcache.keep_pages_count = 0; gcache.keep_pages_size = 0; gcache.mem_size = 0; gcache.name = /home/mysql/I6000//galera.cache; gcache.page_size = 128M; gcache.size = 128M; gcs.fc_debug = 0; gcs.fc_factor = 1.0; gcs.fc_limit = 16; gcs.fc_master_slave = no; gcs.max_packet_size = 64500; gcs.max_throttle = 0.25; gcs.recv_q_hard_limit = 9223372036854775807; gcs.recv_q_soft_limit = 0.25; gcs.sync_donor = no; gmcast.listen_addr = tcp://192.168.1.241:6030; gmcast.segment = 0; gmcast.version = 0; ist.recv_a2016-05-28 15:32:58 4359 [Note] WSREP: Service thread queue flushed.2016-05-28 15:32:58 4359 [Note] WSREP: Assign initial position for certification: -1, protocol version: -12016-05-28 15:32:58 4359 [Note] WSREP: wsrep_sst_grab()2016-05-28 15:32:58 4359 [Note] WSREP: Start replication2016-05-28 15:32:58 4359 [Note] WSREP: Setting initial position to 00000000-0000-0000-0000-000000000000:-12016-05-28 15:32:58 4359 [Note] WSREP: protonet asio version 02016-05-28 15:32:58 4359 [Note] WSREP: Using CRC-32C for message checksums.2016-05-28 15:32:58 4359 [Note] WSREP: backend: asio2016-05-28 15:32:58 4359 [Warning] WSREP: access file(/home/mysql/I6000//gvwstate.dat) failed(No such file or directory)2016-05-28 15:32:58 4359 [Note] WSREP: restore pc from disk failed2016-05-28 15:32:58 4359 [Note] WSREP: GMCast version 02016-05-28 15:32:58 4359 [Note] WSREP: (666e7891, 'tcp://192.168.1.241:6030') listening at tcp://192.168.1.241:60302016-05-28 15:32:58 4359 [Note] WSREP: (666e7891, 'tcp://192.168.1.241:6030') multicast: , ttl: 12016-05-28 15:32:58 4359 [Note] WSREP: EVS version 02016-05-28 15:32:58 4359 [Note] WSREP: gcomm: connecting to group 'pxc_zejin', peer '192.168.1.240:6030,192.168.1.241:6030,192.168.1.242:6030'2016-05-28 15:32:58 4359 [Note] WSREP: (666e7891, 'tcp://192.168.1.241:6030') turning message relay requesting on, nonlive peers: 2016-05-28 15:32:58 4359 [Note] WSREP: declaring 2cadc8a9 at tcp://192.168.1.240:6030 stable2016-05-28 15:32:58 4359 [Note] WSREP: Node 2cadc8a9 state prim2016-05-28 15:32:58 4359 [Note] WSREP: view(view_id(PRIM,2cadc8a9,2) memb {  2cadc8a9,0  666e7891,0} joined {} left {} partitioned {})2016-05-28 15:32:58 4359 [Note] WSREP: save pc into disk2016-05-28 15:32:58 4359 [Note] WSREP: discarding pending addr without UUID: tcp://192.168.1.242:60302016-05-28 15:32:58 4359 [Note] WSREP: discarding pending addr proto entry 0x30f95602016-05-28 15:32:59 4359 [Note] WSREP: gcomm: connected2016-05-28 15:32:59 4359 [Note] WSREP: Changing maximum packet size to 64500, resulting msg size: 326362016-05-28 15:32:59 4359 [Note] WSREP: Shifting CLOSED -> OPEN (TO: 0)2016-05-28 15:32:59 4359 [Note] WSREP: Opened channel 'pxc_zejin'2016-05-28 15:32:59 4359 [Note] WSREP: Waiting for SST to complete.2016-05-28 15:32:59 4359 [Note] WSREP: New COMPONENT: primary = yes, bootstrap = no, my_idx = 1, memb_num = 22016-05-28 15:32:59 4359 [Note] WSREP: STATE EXCHANGE: Waiting for state UUID.2016-05-28 15:32:59 4359 [Note] WSREP: STATE EXCHANGE: sent state msg: 66ae3372-24a6-11e6-8d13-c77d57a8c6322016-05-28 15:32:59 4359 [Note] WSREP: STATE EXCHANGE: got state msg: 66ae3372-24a6-11e6-8d13-c77d57a8c632 from 0 (node6000_240)2016-05-28 15:32:59 4359 [Note] WSREP: STATE EXCHANGE: got state msg: 66ae3372-24a6-11e6-8d13-c77d57a8c632 from 1 (node6000_241)2016-05-28 15:32:59 4359 [Note] WSREP: Quorum results:  version  = 3,  component = PRIMARY,  conf_id  = 1,  members  = 1/2 (joined/total),  act_id   = 12,  last_appl. = -1,  protocols = 0/7/3 (gcs/repl/appl),  group UUID = 6c86dc17-246f-11e6-9955-ae4d7e89eed22016-05-28 15:32:59 4359 [Note] WSREP: Flow-control interval: [23, 23]2016-05-28 15:32:59 4359 [Note] WSREP: Shifting OPEN -> PRIMARY (TO: 12)2016-05-28 15:32:59 4359 [Note] WSREP: State transfer required:   Group state: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:12  Local state: 00000000-0000-0000-0000-000000000000:-12016-05-28 15:32:59 4359 [Note] WSREP: New cluster view: global state: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:12, view# 2: Primary, number of nodes: 2, my index: 1, protocol version 32016-05-28 15:32:59 4359 [Warning] WSREP: Gap in state sequence. Need state transfer.2016-05-28 15:32:59 4359 [Note] WSREP: Running: 'wsrep_sst_xtrabackup-v2 --role 'joiner' --address '192.168.1.241:6020' --datadir '/home/mysql/I6000/' --defaults-file '/home/mysql/pxc6000.cnf' --defaults-group-suffix '' --parent '4359' '' 'WSREP_SST: [INFO] Streaming with xbstream (20160528 15:32:59.795)WSREP_SST: [INFO] Using socat as streamer (20160528 15:32:59.797)WSREP_SST: [INFO] Evaluating timeout -s9 100 socat -u TCP-LISTEN:6020,reuseaddr stdio | xbstream -x; RC=( ${PIPESTATUS[@]} ) (20160528 15:32:59.840)2016-05-28 15:33:00 4359 [Note] WSREP: Prepared SST request: xtrabackup-v2|192.168.1.241:6020/xtrabackup_sst//12016-05-28 15:33:00 4359 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.2016-05-28 15:33:00 4359 [Note] WSREP: REPL Protocols: 7 (3, 2)2016-05-28 15:33:00 4359 [Note] WSREP: Service thread queue flushed.2016-05-28 15:33:00 4359 [Note] WSREP: Assign initial position for certification: 12, protocol version: 32016-05-28 15:33:00 4359 [Note] WSREP: Service thread queue flushed.2016-05-28 15:33:00 4359 [Warning] WSREP: Failed to prepare for incremental state transfer: Local state UUID (00000000-0000-0000-0000-000000000000) does not match group state UUID (6c86dc17-246f-11e6-9955-ae4d7e89eed2): 1 (Operation not permitted)   at galera/src/replicator_str.cpp:prepare_for_IST():482. IST will be unavailable.2016-05-28 15:33:00 4359 [Note] WSREP: Member 1.0 (node6000_241) requested state transfer from '*any*'. Selected 0.0 (node6000_240)(SYNCED) as donor.2016-05-28 15:33:00 4359 [Note] WSREP: Shifting PRIMARY -> JOINER (TO: 12)2016-05-28 15:33:00 4359 [Note] WSREP: Requesting state transfer: success, donor: 0WSREP_SST: [INFO] Proceeding with SST (20160528 15:33:00.512)WSREP_SST: [INFO] Evaluating socat -u TCP-LISTEN:6020,reuseaddr stdio | xbstream -x; RC=( ${PIPESTATUS[@]} ) (20160528 15:33:00.515)WSREP_SST: [INFO] Cleaning the existing datadir and innodb-data/log directories (20160528 15:33:00.517)removed `/home/mysql/I6000/ib_logfile0'removed `/home/mysql/I6000/ib_logfile1'removed `/home/mysql/I6000/xtrabackup_info'removed `/home/mysql/I6000/xtrabackup_checkpoints'removed `/home/mysql/I6000/performance_schema/rwlock_instances.frm'removed `/home/mysql/I6000/performance_schema/db.opt'removed `/home/mysql/I6000/performance_schema/session_account_connect_attrs.frm'removed `/home/mysql/I6000/performance_schema/performance_timers.frm'removed `/home/mysql/I6000/performance_schema/setup_objects.frm'removed `/home/mysql/I6000/performance_schema/events_statements_summary_by_user_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/events_statements_summary_by_digest.frm'removed `/home/mysql/I6000/performance_schema/events_stages_history.frm'removed `/home/mysql/I6000/performance_schema/events_waits_summary_by_user_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/setup_timers.frm'removed `/home/mysql/I6000/performance_schema/events_waits_summary_by_account_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/events_waits_summary_by_thread_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/session_connect_attrs.frm'removed `/home/mysql/I6000/performance_schema/events_stages_history_long.frm'removed `/home/mysql/I6000/performance_schema/table_io_waits_summary_by_index_usage.frm'removed `/home/mysql/I6000/performance_schema/table_io_waits_summary_by_table.frm'removed `/home/mysql/I6000/performance_schema/host_cache.frm'removed `/home/mysql/I6000/performance_schema/events_waits_summary_global_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/events_statements_summary_by_host_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/events_statements_current.frm'removed `/home/mysql/I6000/performance_schema/events_statements_summary_by_thread_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/mutex_instances.frm'removed `/home/mysql/I6000/performance_schema/events_waits_summary_by_host_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/objects_summary_global_by_type.frm'removed `/home/mysql/I6000/performance_schema/events_waits_current.frm'removed `/home/mysql/I6000/performance_schema/events_stages_summary_global_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/threads.frm'removed `/home/mysql/I6000/performance_schema/events_statements_history.frm'removed `/home/mysql/I6000/performance_schema/file_summary_by_instance.frm'removed `/home/mysql/I6000/performance_schema/table_lock_waits_summary_by_table.frm'removed `/home/mysql/I6000/performance_schema/setup_instruments.frm'removed `/home/mysql/I6000/performance_schema/events_stages_summary_by_thread_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/users.frm'removed `/home/mysql/I6000/performance_schema/socket_summary_by_instance.frm'removed `/home/mysql/I6000/performance_schema/socket_instances.frm'removed `/home/mysql/I6000/performance_schema/setup_consumers.frm'removed `/home/mysql/I6000/performance_schema/events_stages_summary_by_host_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/events_waits_summary_by_instance.frm'removed `/home/mysql/I6000/performance_schema/events_stages_current.frm'removed `/home/mysql/I6000/performance_schema/socket_summary_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/events_statements_history_long.frm'removed `/home/mysql/I6000/performance_schema/cond_instances.frm'removed `/home/mysql/I6000/performance_schema/events_waits_history_long.frm'removed `/home/mysql/I6000/performance_schema/events_waits_history.frm'removed `/home/mysql/I6000/performance_schema/events_statements_summary_by_account_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/events_statements_summary_global_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/events_stages_summary_by_account_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/file_instances.frm'removed `/home/mysql/I6000/performance_schema/hosts.frm'removed `/home/mysql/I6000/performance_schema/setup_actors.frm'removed `/home/mysql/I6000/performance_schema/events_stages_summary_by_user_by_event_name.frm'removed `/home/mysql/I6000/performance_schema/accounts.frm'removed `/home/mysql/I6000/performance_schema/file_summary_by_event_name.frm'removed directory: `/home/mysql/I6000/performance_schema'removed `/home/mysql/I6000/zejin/db.opt'removed `/home/mysql/I6000/zejin/t1.ibd'removed `/home/mysql/I6000/zejin/t1.frm'removed directory: `/home/mysql/I6000/zejin'removed `/home/mysql/I6000/xtrabackup_binlog_info'removed `/home/mysql/I6000/backup-my.cnf'removed `/home/mysql/I6000/xtrabackup_binlog_pos_innodb'removed `/home/mysql/I6000/mysql/time_zone_transition_type.MYI'removed `/home/mysql/I6000/mysql/time_zone_transition.MYI'removed `/home/mysql/I6000/mysql/servers.MYD'removed `/home/mysql/I6000/mysql/ndb_binlog_index.frm'removed `/home/mysql/I6000/mysql/servers.MYI'removed `/home/mysql/I6000/mysql/plugin.frm'removed `/home/mysql/I6000/mysql/time_zone_transition_type.MYD'removed `/home/mysql/I6000/mysql/proxies_priv.MYD'removed `/home/mysql/I6000/mysql/proxies_priv.frm'removed `/home/mysql/I6000/mysql/columns_priv.frm'removed `/home/mysql/I6000/mysql/help_keyword.MYI'removed `/home/mysql/I6000/mysql/func.frm'removed `/home/mysql/I6000/mysql/proc.frm'removed `/home/mysql/I6000/mysql/innodb_table_stats.ibd'removed `/home/mysql/I6000/mysql/help_topic.frm'removed `/home/mysql/I6000/mysql/slow_log.CSM'removed `/home/mysql/I6000/mysql/help_relation.MYD'removed `/home/mysql/I6000/mysql/proc.MYD'removed `/home/mysql/I6000/mysql/help_category.MYD'removed `/home/mysql/I6000/mysql/help_category.frm'removed `/home/mysql/I6000/mysql/columns_priv.MYI'removed `/home/mysql/I6000/mysql/help_topic.MYI'removed `/home/mysql/I6000/mysql/event.frm'removed `/home/mysql/I6000/mysql/db.frm'removed `/home/mysql/I6000/mysql/columns_priv.MYD'removed `/home/mysql/I6000/mysql/time_zone_transition.MYD'removed `/home/mysql/I6000/mysql/innodb_index_stats.frm'removed `/home/mysql/I6000/mysql/time_zone.MYI'removed `/home/mysql/I6000/mysql/event.MYD'removed `/home/mysql/I6000/mysql/slave_master_info.ibd'removed `/home/mysql/I6000/mysql/help_topic.MYD'removed `/home/mysql/I6000/mysql/help_relation.MYI'removed `/home/mysql/I6000/mysql/db.MYD'removed `/home/mysql/I6000/mysql/slave_relay_log_info.ibd'removed `/home/mysql/I6000/mysql/user.MYI'removed `/home/mysql/I6000/mysql/plugin.MYI'removed `/home/mysql/I6000/mysql/proc.MYI'removed `/home/mysql/I6000/mysql/help_relation.frm'removed `/home/mysql/I6000/mysql/time_zone_name.MYD'removed `/home/mysql/I6000/mysql/innodb_table_stats.frm'removed `/home/mysql/I6000/mysql/time_zone.frm'removed `/home/mysql/I6000/mysql/servers.frm'removed `/home/mysql/I6000/mysql/general_log.CSV'removed `/home/mysql/I6000/mysql/ndb_binlog_index.MYI'removed `/home/mysql/I6000/mysql/func.MYD'removed `/home/mysql/I6000/mysql/slave_worker_info.ibd'removed `/home/mysql/I6000/mysql/innodb_index_stats.ibd'removed `/home/mysql/I6000/mysql/time_zone_name.frm'removed `/home/mysql/I6000/mysql/proxies_priv.MYI'removed `/home/mysql/I6000/mysql/slow_log.frm'removed `/home/mysql/I6000/mysql/tables_priv.MYI'removed `/home/mysql/I6000/mysql/tables_priv.MYD'removed `/home/mysql/I6000/mysql/procs_priv.frm'removed `/home/mysql/I6000/mysql/help_keyword.MYD'removed `/home/mysql/I6000/mysql/time_zone_leap_second.MYD'removed `/home/mysql/I6000/mysql/tables_priv.frm'removed `/home/mysql/I6000/mysql/ndb_binlog_index.MYD'removed `/home/mysql/I6000/mysql/slow_log.CSV'removed `/home/mysql/I6000/mysql/time_zone.MYD'removed `/home/mysql/I6000/mysql/procs_priv.MYD'removed `/home/mysql/I6000/mysql/slave_master_info.frm'removed `/home/mysql/I6000/mysql/general_log.frm'removed `/home/mysql/I6000/mysql/help_keyword.frm'removed `/home/mysql/I6000/mysql/time_zone_transition_type.frm'removed `/home/mysql/I6000/mysql/general_log.CSM'removed `/home/mysql/I6000/mysql/time_zone_transition.frm'removed `/home/mysql/I6000/mysql/time_zone_name.MYI'removed `/home/mysql/I6000/mysql/event.MYI'removed `/home/mysql/I6000/mysql/time_zone_leap_second.frm'removed `/home/mysql/I6000/mysql/plugin.MYD'removed `/home/mysql/I6000/mysql/slave_relay_log_info.frm'removed `/home/mysql/I6000/mysql/help_category.MYI'removed `/home/mysql/I6000/mysql/user.frm'removed `/home/mysql/I6000/mysql/user.MYD'removed `/home/mysql/I6000/mysql/procs_priv.MYI'removed `/home/mysql/I6000/mysql/db.MYI'removed `/home/mysql/I6000/mysql/time_zone_leap_second.MYI'removed `/home/mysql/I6000/mysql/slave_worker_info.frm'removed `/home/mysql/I6000/mysql/func.MYI'removed directory: `/home/mysql/I6000/mysql'removed `/home/mysql/I6000/ibdata1'WSREP_SST: [INFO] Cleaning the binlog directory /home/mysql/I6000 as well (20160528 15:33:00.540)rm: cannot remove `/home/mysql/I6000/*.index': No such file or directoryWSREP_SST: [INFO] Waiting for SST streaming to complete! (20160528 15:33:00.547)2016-05-28 15:33:01 4359 [Note] WSREP: (666e7891, 'tcp://192.168.1.241:6030') turning message relay requesting off2016-05-28 15:33:15 4359 [Note] WSREP: 0.0 (node6000_240): State transfer to 1.0 (node6000_241) complete.2016-05-28 15:33:15 4359 [Note] WSREP: Member 0.0 (node6000_240) synced with group.WSREP_SST: [INFO] Preparing the backup at /home/mysql/I6000//.sst (20160528 15:33:15.588)WSREP_SST: [INFO] Evaluating innobackupex --no-version-check --apply-log $rebuildcmd ${DATA} &>${DATA}/innobackup.prepare.log (20160528 15:33:15.591)rm: cannot remove `/home/mysql/I6000//innobackup.prepare.log': No such file or directoryrm: cannot remove `/home/mysql/I6000//innobackup.move.log': No such file or directoryWSREP_SST: [INFO] Moving the backup to /home/mysql/I6000/ (20160528 15:33:20.551)WSREP_SST: [INFO] Evaluating innobackupex --defaults-file=/home/mysql/pxc6000.cnf --defaults-group=mysqld --no-version-check  --move-back --force-non-empty-directories ${DATA} &>${DATA}/innobackup.move.log (20160528 15:33:20.554)WSREP_SST: [INFO] Move successful, removing /home/mysql/I6000//.sst (20160528 15:33:20.848)WSREP_SST: [INFO] Galera co-ords from recovery: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:12 (20160528 15:33:20.854)WSREP_SST: [INFO] Total time on joiner: 0 seconds (20160528 15:33:20.857)WSREP_SST: [INFO] Removing the sst_in_progress file (20160528 15:33:20.860)2016-05-28 15:33:20 4359 [Note] WSREP: SST complete, seqno: 122016-05-28 15:33:20 4359 [Note] Plugin 'FEDERATED' is disabled.2016-05-28 15:33:20 4359 [Note] InnoDB: Using atomics to ref count buffer pool pages2016-05-28 15:33:20 4359 [Note] InnoDB: The InnoDB memory heap is disabled2016-05-28 15:33:20 4359 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins2016-05-28 15:33:20 4359 [Note] InnoDB: Memory barrier is not used2016-05-28 15:33:20 4359 [Note] InnoDB: Compressed tables use zlib 1.2.32016-05-28 15:33:20 4359 [Note] InnoDB: Using Linux native AIO2016-05-28 15:33:20 4359 [Note] InnoDB: Using CPU crc32 instructions2016-05-28 15:33:20 4359 [Note] InnoDB: Initializing buffer pool, size = 100.0M2016-05-28 15:33:20 4359 [Note] InnoDB: Completed initialization of buffer pool2016-05-28 15:33:20 4359 [Note] InnoDB: Highest supported file format is Barracuda.2016-05-28 15:33:20 4359 [Note] InnoDB: 128 rollback segment(s) are active.2016-05-28 15:33:20 4359 [Note] InnoDB: Waiting for purge to start2016-05-28 15:33:21 4359 [Note] InnoDB: Percona XtraDB (http://www.percona.com) 5.6.26-74.0 started; log sequence number 16501982016-05-28 15:33:21 4359 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 73f9a99b-24a6-11e6-a163-000c2973aa48.2016-05-28 15:33:21 4359 [Note] RSA private key file not found: /home/mysql/I6000//private_key.pem. Some authentication plugins will not work.2016-05-28 15:33:21 4359 [Note] RSA public key file not found: /home/mysql/I6000//public_key.pem. Some authentication plugins will not work.2016-05-28 15:33:21 4359 [Note] Server hostname (bind-address): '*'; port: 60002016-05-28 15:33:21 4359 [Note] IPv6 is available.2016-05-28 15:33:21 4359 [Note]  - '::' resolves to '::';2016-05-28 15:33:21 4359 [Note] Server socket created on IP: '::'.2016-05-28 15:33:21 4359 [Warning] 'user' entry 'root@zejin240' ignored in --skip-name-resolve mode.2016-05-28 15:33:21 4359 [Warning] 'user' entry '@zejin240' ignored in --skip-name-resolve mode.2016-05-28 15:33:21 4359 [Warning] 'proxies_priv' entry '@ root@zejin240' ignored in --skip-name-resolve mode.2016-05-28 15:33:21 4359 [Note] Event Scheduler: Loaded 0 events2016-05-28 15:33:21 4359 [Note] WSREP: Signalling provider to continue.2016-05-28 15:33:21 4359 [Note] WSREP: Initialized wsrep sidno 22016-05-28 15:33:21 4359 [Note] WSREP: SST received: 6c86dc17-246f-11e6-9955-ae4d7e89eed2:122016-05-28 15:33:21 4359 [Note] /usr/local/pxc_56/bin/mysqld: ready for connections.Version: '5.6.26-74.0-25.12-log' socket: '/home/mysql/I6000/mysql.sock' port: 6000 Percona XtraDB Cluster binary (GPL) 5.6.26-25.12, Revision 624ef81, wsrep_25.122016-05-28 15:33:21 4359 [Note] WSREP: 1.0 (node6000_241): State transfer from 0.0 (node6000_240) complete.2016-05-28 15:33:21 4359 [Note] WSREP: Shifting JOINER -> JOINED (TO: 12)2016-05-28 15:33:21 4359 [Note] WSREP: Member 1.0 (node6000_241) synced with group.2016-05-28 15:33:21 4359 [Note] WSREP: Shifting JOINED -> SYNCED (TO: 12)2016-05-28 15:33:21 4359 [Note] WSREP: Synchronized with group, ready for connections2016-05-28 15:33:21 4359 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.

可以看到裡面有大量的removed操作，它會刪除數據文件夾裡面的所有文件，再從主節點那裡通過SST獲取數據官方說明：

XtraBackup SST works in two stages:   • Stage I on joiner checks if it is SST or IST based on presence of xtrabackup_ist file.   • In Stage II it starts the data transfer, if it's SST, it empties the data directory sans few files (galera.cache, sst_in_progress, grastate.dat) and then proceed with the SST or if it's IST, proceeds as before.

至此我們完成了pxc環境下避免新節點加入時需要進行SST的方法，在數據量大時SST將會占用大量的資源，配置的gcache.size足夠容納從備份到恢復此時間段內主節點產生的數據量，建議通過業務低峰期時通過腳本來實現此新節點加入操作。

以上這篇MySQL PXC構建一個新節點只需IST傳輸的方法(推薦)就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持。