MariaDB on ZFS: Difference between revisions
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[[ | [[Category: MySQL|ZFS]] | ||
[[ | [[Category: MariaDB|ZFS]] | ||
==ZFS parameters== | ==ZFS parameters== | ||
< | <syntaxhighlight lang=bash> | ||
zfs set atime=off MYSQL-DATA | zfs set atime=off MYSQL-DATA | ||
zfs set compression=lz4 MYSQL-DATA | zfs set compression=lz4 MYSQL-DATA | ||
| Line 17: | Line 17: | ||
zfs set primarycache=metadata MYSQL-LOG/ib_log | zfs set primarycache=metadata MYSQL-LOG/ib_log | ||
</ | </syntaxhighlight> | ||
< | <syntaxhighlight lang=bash> | ||
# zfs list -o recordsize,primarycache,compression,compressratio,atime,name -r MYSQL-DATA -r MYSQL-LOG | # zfs list -o recordsize,primarycache,compression,compressratio,atime,name -r MYSQL-DATA -r MYSQL-LOG | ||
RECSIZE PRIMARYCACHE COMPRESS RATIO ATIME NAME | RECSIZE PRIMARYCACHE COMPRESS RATIO ATIME NAME | ||
| Line 29: | Line 29: | ||
128K all lz4 1.00x off MYSQL-LOG/binlog | 128K all lz4 1.00x off MYSQL-LOG/binlog | ||
128K metadata lz4 2.17x off MYSQL-LOG/ib_log | 128K metadata lz4 2.17x off MYSQL-LOG/ib_log | ||
</ | </syntaxhighlight> | ||
===If you have innodb_file_per_table=on=== | ===If you have innodb_file_per_table=on=== | ||
< | <syntaxhighlight lang=bash> | ||
# mysql -e 'show variables like "innodb_file_per_table";' | # mysql -e 'show variables like "innodb_file_per_table";' | ||
+-----------------------+-------+ | +-----------------------+-------+ | ||
| Line 39: | Line 39: | ||
| innodb_file_per_table | ON | | | innodb_file_per_table | ON | | ||
+-----------------------+-------+ | +-----------------------+-------+ | ||
</ | </syntaxhighlight> | ||
* If you have only InnoDB-Tables or the only productive ones are InnoDB then consider setting the blocksize of MYSQL-DATA/data to 16k because all Innodb-Datafiles (*.ibd) will be written there :-\.* | * If you have only InnoDB-Tables or the only productive ones are InnoDB then consider setting the blocksize of MYSQL-DATA/data to 16k because all Innodb-Datafiles (*.ibd) will be written there :-\.* | ||
* consider setting the initial innodb_data_file_path to smaller value like ibdata1:100M:autoextend | * consider setting the initial innodb_data_file_path to smaller value like ibdata1:100M:autoextend | ||
==Database parameters for ZFS== | ==Database parameters for ZFS== | ||
< | <syntaxhighlight lang=mysql> | ||
datadir = /MYSQL-DATA/data/mysql | datadir = /MYSQL-DATA/data/mysql | ||
innodb_data_home_dir = /MYSQL-DATA/InnoDB | innodb_data_home_dir = /MYSQL-DATA/InnoDB | ||
| Line 53: | Line 53: | ||
innodb_file_per_table = off | innodb_file_per_table = off | ||
skip-innodb_doublewrite | skip-innodb_doublewrite | ||
</ | </syntaxhighlight> | ||
< | <syntaxhighlight lang=bash> | ||
# /usr/sbin/mysqld --print-defaults | # /usr/sbin/mysqld --print-defaults | ||
/usr/sbin/mysqld would have been started with the following arguments: | /usr/sbin/mysqld would have been started with the following arguments: | ||
| Line 72: | Line 72: | ||
--skip-innodb_doublewrite | --skip-innodb_doublewrite | ||
--tmpdir=/tmp | --tmpdir=/tmp | ||
</ | </syntaxhighlight> | ||
On Linux do not forget to add new directories to apparmor! | On Linux do not forget to add new directories to apparmor! | ||
Latest revision as of 02:33, 26 November 2021
ZFS parameters
zfs set atime=off MYSQL-DATA
zfs set compression=lz4 MYSQL-DATA
zfs set atime=off MYSQL-LOG
zfs set compression=lz4 MYSQL-LOG
zfs set recordsize=8k MYSQL-DATA/data
zfs set recordsize=16k MYSQL-DATA/InnoDB
zfs set primarycache=metadata MYSQL-DATA/InnoDB
zfs set primarycache=metadata MYSQL-LOG/ib_log
# zfs list -o recordsize,primarycache,compression,compressratio,atime,name -r MYSQL-DATA -r MYSQL-LOG
RECSIZE PRIMARYCACHE COMPRESS RATIO ATIME NAME
128K all lz4 1.06x off MYSQL-DATA
16K metadata lz4 2.81x off MYSQL-DATA/InnoDB
8K all lz4 1.05x off MYSQL-DATA/data
128K all lz4 2.15x off MYSQL-LOG
128K all lz4 1.00x off MYSQL-LOG/binlog
128K metadata lz4 2.17x off MYSQL-LOG/ib_log
If you have innodb_file_per_table=on
# mysql -e 'show variables like "innodb_file_per_table";'
+-----------------------+-------+
| Variable_name | Value |
+-----------------------+-------+
| innodb_file_per_table | ON |
+-----------------------+-------+
- If you have only InnoDB-Tables or the only productive ones are InnoDB then consider setting the blocksize of MYSQL-DATA/data to 16k because all Innodb-Datafiles (*.ibd) will be written there :-\.*
- consider setting the initial innodb_data_file_path to smaller value like ibdata1:100M:autoextend
Database parameters for ZFS
datadir = /MYSQL-DATA/data/mysql
innodb_data_home_dir = /MYSQL-DATA/InnoDB
innodb_data_file_path = ibdata1:2000M:autoextend
innodb_log_group_home_dir = /MYSQL-LOG/ib_log
#innodb_flush_method = O_DIRECT
innodb_flush_log_at_trx_commit = 2
innodb_file_per_table = off
skip-innodb_doublewrite
# /usr/sbin/mysqld --print-defaults
/usr/sbin/mysqld would have been started with the following arguments:
--server_id=42
--user=mysql
--pid-file=/var/run/mysqld/mysqld.pid
--socket=/var/run/mysqld/mysqld.sock
--port=3306
--basedir=/usr
--datadir=/MYSQL-DATA/data/mysql
--innodb_data_home_dir=/MYSQL-DATA/InnoDB
--innodb_data_file_path=ibdata1:100M:autoextend
--innodb_log_group_home_dir=/MYSQL-LOG/ib_log
--innodb_flush_method=O_DIRECT
--innodb_flush_log_at_trx_commit=2
--skip-innodb_doublewrite
--tmpdir=/tmp
On Linux do not forget to add new directories to apparmor!
