Xtrabackup 使用stream輸出並壓縮備份

mysql:5.6.29
xtrabackup:2.2.10
mysql數據目錄:/data/mysql
mysql備份目錄:/data/dbbak/full #確保有足夠的磁盤空間

1、安裝依賴

yum -y install libaio perl-Time-HiRes perl-DBD-MySQL perl-IO-Socket-SSL rsync.x86_64

2、安裝xtrabackup

rpm -ivh percona-xtrabackup-2.2.10-1.el6.x86_64.rpm

3、在數據庫創建備份賬號

mysql> CREATE USER 'bkpuser'@'localhost' IDENTIFIED BY 's3cret';
mysql> GRANT RELOAD, LOCK TABLES, REPLICATION CLIENT,Process ON *.* TO 'bkpuser'@'localhost';
mysql> FLUSH PRIVILEGES;

4、使用xbstream備份

time innobackupex --user=bkpuser  --password=s3cret  --no-timestamp --defaults-file=/etc/my.cnf  /data/dbbak/full --tmpdir=/data/dbbak/full -stream=xbstream|gzip - > /data/dbbak/full/full.xbstream.gz
161124 10:08:50  innobackupex: Connection to database server closed
161124 10:08:50  innobackupex: completed OK!

real    0m37.613s
user    0m28.506s
sys    0m3.186s
解壓
time gzip -d full.xbstream.gz
real    0m26.678s
user    0m13.405s
sys    0m2.354s
time xbstream -x <full.xbstream
real    1m7.379s
user    0m6.055s
sys    0m11.173s

5、使用tar備份

time innobackupex --user=bkpuser  --password=s3cret  --no-timestamp --defaults-file=/etc/my.cnf  /data/dbbak/full --tmpdir=/data/dbbak/full --stream=tar |gzip - > /data/dbbak/full/full.tar.gz
innobackupex: You must use -i (--ignore-zeros) option for extraction of the tar stream.
161124 10:09:53  innobackupex: completed OK!

real    0m34.934s
user    0m26.500s
sys    0m2.816s
解壓
time tar -ixzvf /data/dbbak/full/full.tar.gz

real    0m27.310s
user    0m12.818s
sys    0m3.735s

或者
gzip -d /data/dbbak/full/full.tar.gz
tar -ixvf /data/dbbak/full/full.tar.gz
推薦使用tar -ixzvf /data/dbbak/full/full.tar.gz 解壓

6、對比2種導出的文件大小

[root@VM_166_129 full]# ll
total 95232
-rw-r--r-- 1 root root 48704253 Nov 24 10:09 full.tar.gz
-rw-r--r-- 1 root root 48809971 Nov 24 10:23 full.xbstream.gz

7、總結
使用--stream=tar備份，壓縮、解壓、已經壓縮后的大小都優於-stream=xbstream,推薦使用--stream=tar方式壓縮,解壓時還可以配合tar。