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Date:      Mon, 20 May 2013 08:53:36 -0600
From:      Josh Beard <josh@signalboxes.net>
To:        freebsd-fs@freebsd.org
Subject:   L2ARC and ZIL on same SSD?
Message-ID:  <CAHDrHSv-%2BPjLiPcZrE7CJx85Qyo%2B%2BYv%2Bc_1myNH_mZ1nS5Xwog@mail.gmail.com>

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Hello,

I have a file server running 9.1-RELEASE with 24 GB of RAM and a 6 TB zpool
spread across 12 500GB disks in two raidz1 and 2 spares.  This server
houses hundreds of home directories for end-users and stays pretty busy
with both read and writes.

I'm planning to add two SSDs soon (128 GB each) to help performance and was
planning to mirror them. I was curious if having the L2ARC and ZIL on the
same disks (mirrored) is okay.  With some searching, I haven't seen any
"official" word on this.  I've seen some folks say not to and others
recommend it.  Adding a second set of SSDs isn't desirable, as I'll start
cutting into my available storage capacity (16 bay system).

Any advice or experience with this?

Thanks,
Josh



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