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consequences of using “innodb_flush_method = O_DIRECT” without having a battery backed write cache? or on a KVM guest?
Mysql 5.5.29 Innodb- 128GB Ram - 32 cores - Raid 10 SSD.
Our server which is a dedicated KVM guest on a 'baremetal' is hosting our heavy read-write DB server.
Everything is file-per-table. ...
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Should we need to use Barriers on a production database (MySQL/InnoDB)?
Even though we are using a journaling filesystem (EXT3) with barrier enabled, is this still safer and recommended?
e.g
mount -o barrier=1 /dev/sda /mntpnt
Reference:
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