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Date: Mon, 28 Mar 2011 18:50:29 +0200
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From: Claus Guttesen <kometen@gmail.com>
To: Freddie Cash <fjwcash@gmail.com>
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Cc: FreeBSD Stable <freebsd-stable@freebsd.org>
Subject: Re: zfs, nfs and zil
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> If your disk controller has a lot of cache on it, and a battery
> backup, then enabling the write cache and disabling the ZIL can be
> faster, without sacrifising consistency (the write cache on the
> controller acts like a ZIL). =A0There's several threads on the
> zfs-discuss mailing list where this is discussed.

It's an areca sata-controller with 512 MB battery backed cache.

> However, the better solution, and the one most recommended for those
> using NFS with ZFS, is to install a small, write-optimised, SLC-based
> SSD to the system as a separate log (SLOG/ZIL) device.
>
> NFS is a very sync-heavy protocol, and having a super-fast ZIL sitting
> on a separate SSD will greatly improve things.

Thank you. I'll get a ssd-drive (also suggested by Alexander).

--=20
regards
Claus

When lenity and cruelty play for a kingdom,
the gentler gamester is the soonest winner.

Shakespeare

twitter.com/kometen