备份机制：
Wiki后台mysql数据是使用多实例安装配置的，主要是优点是能够按照多个业务做多个实例库，合理利用系统资源、增强业务扩展。
分库备份：（此备份方法较适合单数据库，在单个库出现问题是只恢复问题库。）
命令如下：
mysqldump-u$user -p$password --skip-lock-tables --default-character-set=utf8 -B$DBname>$DBfile
定时任务：（mysql服务器操作）
#添加定时任务，让系统自动对数据库进行定时备份。（直接crontab –e 复制粘贴进去即可）
0 0 * * */bin/sh /data/DBscripts/confluence-dump.sh>/data/DBback/confluence/mysqldb.log 2>&1
15 0 * * */bin/sh /data/DBscripts/jira-dump.sh>/data/DBback/confluence/mysqldb.log 2>&1
30 0 * * */bin/sh /data/DBscripts/crowd-dump.sh>/data/DBback/confluence/mysqldb.log 2>&1
0 01 * * */bin/sh /data/DBscripts/backup.sh>>/data/rsync.log
开机启动项：（mysql服务器操作）
#将启动命令添加到开启自启动内。(mysql安装详见《wiki系统安装配置文档》)
/data/3306/mysql start
Mysql数据库配置文件my.cnf （mysql服务器操作）
[client]
port = 3306
socket = /data/3306/mysql.sock
[mysql]
no-auto-rehash
[mysqld]
default-storage-engine=MYISAM
default_table_type=MYISAM
user = mysql
port = 3306
socket = /data/3306/mysql.sock
basedir = /usr/local/mysql
datadir = /data/3306/data
default-character-set=utf8
symbolic-links=0
open_files_limit = 1024
back_log = 600
max_connections = 800
max_connect_errors = 3000
table_cache = 614
external-locking = FALSE
max_allowed_packet =250M
sort_buffer_size = 1M
join_buffer_size = 1M
thread_cache_size = 100
thread_concurrency = 2
query_cache_size = 2M
query_cache_limit = 1M
query_cache_min_res_unit = 2k
#default_table_type = InnoDB
thread_stack = 192K
#transaction_isolation = READ-COMMITTED
tmp_table_size = 2M
max_heap_table_size = 2M
long_query_time = 1
log_long_format
log-error = /data/3306/error.log
log-slow-queries = /data/3306/slow.log
pid-file = /data/3306/mysql.pid
log-bin = /data/3306/mysql-bin
relay-log = /data/3306/relay-bin
relay-log-info-file =/data/3306/relay-log.info
binlog_cache_size = 1M
binlog_format=row
max_binlog_cache_size = 1M
max_binlog_size = 2M
expire_logs_days = 7
key_buffer_size = 16M
read_buffer_size = 1M
read_rnd_buffer_size = 1M
bulk_insert_buffer_size = 1M
myisam_sort_buffer_size = 1M
myisam_max_sort_file_size = 10G
myisam_max_extra_sort_file_size = 10G
myisam_repair_threads = 1
myisam_recover
lower_case_table_names = 1
skip-name-resolve
slave-skip-errors = 1032,1062
replicate-ignore-db=mysql
server-id = 1
#innodb_additional_mem_pool_size = 4M
#innodb_buffer_pool_size = 32M
#innodb_data_file_path =ibdata1:128M:autoextend
#innodb_file_io_threads = 4
#innodb_thread_concurrency = 8
#innodb_flush_log_at_trx_commit = 2
#innodb_log_buffer_size = 2M
#innodb_log_file_size = 4M
#innodb_log_files_in_group = 3
#innodb_max_dirty_pages_pct = 90
#innodb_lock_wait_timeout = 120
#innodb_file_per_table = 0
[mysqldump]
quick
max_allowed_packet = 160M
[mysqld_safe]
log-error=/data/3306/mysql_oldboy3306.err
pid-file=/data/3306/mysqld.pid
单库备份：（mysql服务器操作）
mysql备份脚本：（该脚本可用在jira、confluence、corwd这3个库，按照下面提示只要将DBName=“数据库名”即可）。
#!/bin/bash
##The script is for admin!
##backup mysql database
DBName=confluence （根据数据库名字可以写多个库的脚本）
DBUser=root
DBPath=/data/DBback/confluence
DBLog=/data/DBback/confluence/mysqldb.log
DBSock=/data/3306/mysql.sock
DBMax="--max_allowed_packet=512M"
DBSkip="--skip-lock-tables--default-character-set=utf8"
echo"-------------------------------------------" >> $DBLog
echo $(date +"%y-%m-%d %H:%M:%S")>> $DBLog
echo"---------------------------------------" >> $DBLog
/usr/local/mysql/bin/mysqldump $DBMax -u$DBUser -S $DBSock $DBName $DBSkip -B >$DBPath/confluence_$(date +%F).sql
cd $DBPath
tar zcf confluence_$(date +%F).tar.gz confluence_$(date +%F).sql >/dev/null2>&1
rm -f confluence_$(date +%F).sql\
&& echo "mysqldump confluenceis succeed ">>$DBLog \
|| echo "mysqldump cpmfluence isfail">>$DBLog
#del old files
echo "***************************************">>$DBLog
echo "delete confluence old datafiles" >>$DBLog
echo"*******************************************">>$DBLog
find $DBPath -name "*.tar.gz"-mtime +15 |xargs rm -f \
&& echo "delete 7 days ago oldfile succeed">>$DBLog \
|| echo "delete 7 days ago old filefail" >>$DBLog
Rsync服务拓扑图：
Rsync脚本：（此为数据传输服务，该配置里是将备份到本地的数据。Mysql服务器操作）
[root@wikiDB ~]# cat/data/DBscripts/backup.sh
BKlog=/data/rsync.log
cd /data/
echo "thersync-backup at `date +%F`" >>$BKlog
/usr/bin/rsync -avzDBback [email protected]::backup/ --password-file=/etc/rsync.password>>$BKlog
/usr/bin/rsync -avzDBscripts [email protected]::backup/--password-file=/etc/rsync.password >>$BKlog
/usr/bin/rsync -avz/etc/rc.d/rc.local [email protected]::backup/--password-file=/etc/rsync.password >>$BKlog
/usr/bin/rsync -avz/var/spool/cron/root [email protected]::backup/--password-file=/etc/rsync.password >>$BKlog
/usr/bin/rsync -avz/data/3306 [email protected]::backup/ --password-file=/etc/rsync.password>>$BKlog
echo "backupok........!" >>$BKlog
exit 1
定时备份WIKI前端的数据：（WIKI前端操作）
[root@wikiscripts]# crontab -l
*/5 * * * */usr/sbin/ntpdate time.windows.com >/dev/null 2>&1
00 0 * * * /bin/sh/data/backup/scripts/jiradata.sh >/dev/null2>&1
15 0 * * * /bin/sh/data/backup/scripts/wikidata.sh >/dev/null 2>&1
30 0 * * * /bin/sh/data/backup/scripts/del-oldfile.sh >/dev/null 2>&1
总结：将所有备份文件推送到10.168.0.182上，定时保留该服务器的镜像。同时在mysql数据库上启用samba服务，定时拉取备份文件。