Description:
OS: Ubuntu 14.04 kernel 3.13.0-27-generic #50-Ubuntu
MySQL version 5.5
MySQL will not start when data transferred to a ZFS pool. It fails with the following from the /var/log/mysql/error.log
140531 19:49:19 mysqld_safe Starting mysqld daemon with databases from /data/mysql/mysql
140531 19:49:19 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
140531 19:49:19 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead.
140531 19:49:19 [Note] Plugin 'FEDERATED' is disabled.
/usr/sbin/mysqld: Table 'plugin' is read only
140531 19:49:19 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
140531 19:49:19 InnoDB: The InnoDB memory heap is disabled
140531 19:49:19 InnoDB: Mutexes and rw_locks use GCC atomic builtins
140531 19:49:19 InnoDB: Compressed tables use zlib 1.2.8
140531 19:49:19 InnoDB: Using Linux native AIO
140531 19:49:19 InnoDB: Initializing buffer pool, size = 128.0M
140531 19:49:19 InnoDB: Completed initialization of buffer pool
140531 19:49:19 InnoDB: highest supported file format is Barracuda.
140531 19:49:19 InnoDB: Operating system error number 22 in a file operation.
InnoDB: Error number 22 means 'Invalid argument'.
InnoDB: Some operating system error numbers are described at
InnoDB: http://dev.mysql.com/doc/refman/5.5/en/operating-system-error-codes.html
InnoDB: File name ./ib_logfile0
InnoDB: File operation call: 'aio write'.
InnoDB: Cannot continue operation.
140531 19:49:19 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
How to repeat:
I had followed the procedure given in http://sharadchhetri.com/2013/05/18/how-to-change-mysql-default-data-directory-in-ubuntu/
to change my default MySQL data directory to a ZFS pool.
My my.conf file is:
#
# The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
#socket = /data/mysql/mysqld.sock
#innodb_use_native_aio = 0
# Here is entries for some specific programs
# The following values assume you have at least 32M ram
# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
#socket = /data/mysql/mysqld.sock
nice = 0
[mysqld]
#
# * Basic Settings
#
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
#socket = /data/mysql/mysqld.sock
port = 3306
basedir = /usr
#datadir = /var/lib/mysql
datadir = /data/mysql/mysql
tmpdir = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address = 127.0.0.1
#
# * Fine Tuning
#
key_buffer = 16M
max_allowed_packet = 16M
thread_stack = 192K
thread_cache_size = 8
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam-recover = BACKUP
#max_connections = 100
#table_cache = 64
#thread_concurrency = 10
#
# * Query Cache Configuration
#
query_cache_limit = 1M
query_cache_size = 16M
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file = /var/log/mysql/mysql.log
#general_log = 1
#
# Error log - should be very few entries.
#
log_error = /var/log/mysql/error.log
#
# Here you can see queries with especially long duration
#log_slow_queries = /var/log/mysql/mysql-slow.log
#long_query_time = 2
#log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
# other settings you may need to change.
#server-id = 1
#log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days = 10
max_binlog_size = 100M
#binlog_do_db = include_database_name
#binlog_ignore_db = include_database_name
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem
[mysqldump]
quick
quote-names
max_allowed_packet = 16M
[mysql]
#no-auto-rehash # faster start of mysql but no tab completition
[isamchk]
key_buffer = 16M
#
# * IMPORTANT: Additional settings that can override those from this file!
# The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/
#####################################################
And my armorapp config file is: (usr.sbin.mysqld)
# vim:syntax=apparmor
# Last Modified: Tue Jun 19 17:37:30 2007
#include <tunables/global>
/usr/sbin/mysqld {
#include <abstractions/base>
#include <abstractions/nameservice>
#include <abstractions/user-tmp>
#include <abstractions/mysql>
#include <abstractions/winbind>
capability dac_override,
capability sys_resource,
capability setgid,
capability setuid,
network tcp,
/etc/hosts.allow r,
/etc/hosts.deny r,
/etc/mysql/*.pem r,
/etc/mysql/conf.d/ r,
/etc/mysql/conf.d/* r,
/etc/mysql/*.cnf r,
/usr/lib/mysql/plugin/ r,
/usr/lib/mysql/plugin/*.so* mr,
/usr/sbin/mysqld mr,
/usr/share/mysql/** r,
/var/log/mysql.log rw,
/var/log/mysql.err rw,
####
/var/lib/mysql/ r,
/var/lib/mysql/** rwk,
/data/mysql/mysql/ r,
/data/mysql/mysql/** rwk,
######
/var/log/mysql/ r,
/var/log/mysql/* rw,
/var/run/mysqld/mysqld.pid rw,
/var/run/mysqld/mysqld.sock w,
/run/mysqld/mysqld.pid rw,
/run/mysqld/mysqld.sock w,
/sys/devices/system/cpu/ r,
# Site-specific additions and overrides. See local/README for details.
#include <local/usr.sbin.mysqld>
}
########################################################################
Note that my new MySQL data directory is /data/mysql/mysql which is in a ZFS pool (native ZFS on Linux)
Also note that I tried
innodb_use_native_aio = 0
(was uncommented when tried) in my my.cnf file and it had no effect see
140531 19:49:19 InnoDB: Using Linux native AIO
The above worked when /data/mysql/mysql was NOT from a ZFS pool but rather an ext4 formatted SSD.
I've tried hours of searching to no avail! I want MySQL to store its data on my RAIDZ2 zpool rather than my ssd
Thanks so much for any help!
Phil
Suggested fix:
Must find a way to disable Linux native AIO
