Date: Mon, 28 Mar 2011 21:26:21 +0200 From: Alexander Leidinger <Alexander@Leidinger.net> To: Claus Guttesen <kometen@gmail.com> Cc: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: Re: zfs, nfs and zil Message-ID: <20110328212621.0000696d@unknown> In-Reply-To: <BANLkTimB-LAnDvAt0Xk6ZvE=96NU=f5Hsw@mail.gmail.com> References: <BANLkTinZvLDkmUNHmDGQpQFRr31s=hyHuQ@mail.gmail.com> <AANLkTimOjxS12fgWnp2QHaJsb5ixKdFXtfvM2i0JdLH6@mail.gmail.com> <BANLkTimB-LAnDvAt0Xk6ZvE=96NU=f5Hsw@mail.gmail.com>
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On Mon, 28 Mar 2011 18:50:29 +0200 Claus Guttesen <kometen@gmail.com> wrote: > > 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). You need to be aware that the same redundancy concerns apply to the log device as for the normal pool. If you only have one SSD, as soon as it crashes you lose data. If you have two in a mirror, you can survive the loss of one. Bye, Alexander. -- http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137
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