Date: Mon, 15 Feb 2010 10:49:47 +0200 From: Dan Naumov <dan.naumov@gmail.com> To: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: RE: hardware for home use large storage Message-ID: <cf9b1ee01002150049o43fced71ucb5776a0a1eaf4cf@mail.gmail.com>
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> I had a feeling someone would bring up L2ARC/cache devices. This gives > me the opportunity to ask something that's been on my mind for quite > some time now: > > Aside from the capacity different (e.g. 40GB vs. 1GB), is there a > benefit to using a dedicated RAM disk (e.g. md(4)) to a pool for > L2ARC/cache? The ZFS documentation explicitly states that cache > device content is considered volatile. Using a ramdisk as an L2ARC vdev doesn't make any sense at all. If you have RAM to spare, it should be used by regular ARC. - Sincerely, Dan Naumov
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