Lee H. Marzke on 17 Mar 2017 11:47:14 -0700

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Re: [PLUG] Backups vs Copies: was Avoid Arvixe at all costs!

I've used both zvols over iscsi and NFS shares  , and both work great running on a dedicated zfs server (old dell 2950 ,32gb ram , 2 ssds for l2arc and slog/zil , 6 x 2tb NLSAS, 3 mirrors). Had to swap out the existing perc raid controller for a sas6 i to be safe.

Freenas can quiesce VMware before San snapshot,  then I replicate the entire volumes offsite.

NFS synchronous writes to esxi have terrible  write performance until you add the ssd slog device. ( Intel 320 with supercaps. )

I have at least a dozen VMs: web servers ,  db, firewall, mail, asterisk PBX, slim music server, plex server,  and VMware lab all running from this one zfs unit.

I've found the freenas native GUI snapshots and replication work to rsync.net,s new zfs based service.

Other nas units tank during a single clone or s-vmotion ,  but freenas doesn't even notice.

I'm very happy with freenas so far  even though its not Linux,  has worked well for me.  Ive also used Nexenta on open Indiana, and smartOS on the same hardware.


Sent from Nine

From: Rich Freeman <r-plug@thefreemanclan.net>
Sent: Mar 17, 2017 10:10 AM
To: Philadelphia Linux User's Group Discussion List
Subject: Re: [PLUG] Backups vs Copies: was Avoid Arvixe at all costs!

On Fri, Mar 17, 2017 at 10:03 AM, Lee H. Marzke <lee@marzke.net> wrote:
> My VM volumes (servers) are just zfs snap/sent offsite nightly.  Zfs
> (freenas at this time )maintains several old snaps.

Are you using zfs volumes for this?  How do they generally perform for
VMs (lots of internal writes, presumably with some history of
snapshots/etc)?  I realize that this is what they were created for,
but I know that btrfs is terrible with this so I am curious.

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