Re: KVM: writethrough / writeback - data integrity
Bruce,
thank you for your reply.
> This wholly depends on what kind of application and/or database you're
> hosting on your production server; and, it also depends on what kind of
> back-end infrastructure (SAN? Virtualized Lx? VMware, Xen, otherwise?) --
it's a server RAID-5. One partition is a KVM raw image file (host uses
ext4), the other a partition on the host system passed to KVM guest. Host
and guest are Debian Jessie.
> Write-through, write-back and mixed-mode options have implications that
> will affect the performance, redundancy, availability and time-to-recover
> of your production applications. Are you using any database software?
Dovecot with Maildir.
> In example, production DB filesystems can have different mount options and
> attributes as listed in /etc/fstab and based on production requirements.
The partitions have ext4 file system.
- Chris
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