Date: Wed, 3 Nov 2010 11:21:08 -0700 From: Freddie Cash <fjwcash@gmail.com> To: fs@freebsd.org Subject: Re: Using an SSD "disk" for / Message-ID: <AANLkTimtxH4QCz%2BnbA_QYwE7BhDi-SR6p9FP21TwDTW4@mail.gmail.com> In-Reply-To: <AANLkTi=7rfMGoVgyEA0z28XS47dR_0f5zSW96pJMKow0@mail.gmail.com> References: <4CD04AEC.8040607@aldan.algebra.com> <E1PDdUQ-000Fbg-S5@dilbert.ticketswitch.com> <AANLkTi=7rfMGoVgyEA0z28XS47dR_0f5zSW96pJMKow0@mail.gmail.com>
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On Wed, Nov 3, 2010 at 10:39 AM, Tom Evans <tevans.uk@googlemail.com> wrote: > On Wed, Nov 3, 2010 at 1:34 PM, Pete French <petefrench@ticketswitch.com> wrote: >> I boot a server from a Compact Flash drive connected to a CF->SATA >> adaptor. Its only 4GB, enough to boot, and then all my read/write >> partititons come from several terrabytes of attached zpool. It >> works excellently, and was very cheap to setup. Performance is >> fine as you are almost never writing to the flash drive. The only >> time I notice the slowdown is when doing an installworld or installkernel. > > When you set up your disks like this, where do you put your swap? > > For my home ZFS server - which has a tank with two raidz pools, each > with 6 disks in - I partitioned the first 6 disks into 2 partitions, a > 6 GB chunk at the start, and the remaining data used for zfs. I then > use 3 of the disks first partition in a gmirror UFS root partition, > and the other 3 as swap. We do something similar to Pete: - 2x CompactFlash disks in CF-to-SATA adapters, gmirror'd together for the OS - bunch of SATA disks configured via ZFS, for everything else But, we add an SSD for L2ARC use, with 8 GB partitioned off for swap. Thus, the CF disks are basically read-only except for installworld/kernel and the odd config file update. -- Freddie Cash fjwcash@gmail.com
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