Date: Mon, 4 Jan 2016 22:42:21 -0500 From: Paul Kraus <paul@kraus-haus.org> To: Adam Vande More <amvandemore@gmail.com> Cc: FreeBSD Filesystems <freebsd-fs@freebsd.org>, "Mikhail T." <mi+thun@aldan.algebra.com> Subject: Re: NFS reads vs. writes Message-ID: <38A28FE6-5EE9-48B0-BC7C-6C02EB2C0700@kraus-haus.org> In-Reply-To: <CA%2BtpaK06bbFat--1xYDnWnShNziV3z9F5X3kwiY1APQxB55G0Q@mail.gmail.com> References: <8291bb85-bd01-4c8c-80f7-2adcf9947366@email.android.com> <5688D3C1.90301@aldan.algebra.com> <495055121.147587416.1451871433217.JavaMail.zimbra@uoguelph.ca> <568A047B.1010000@aldan.algebra.com> <CAGtEZUD28UZDYyHtHtzXgys%2Brpv_37u4fotwR%2BqZLc1%2BtK0dwA@mail.gmail.com> <D0AC7351-25DC-478C-981E-E32B1F5E353F@kraus-haus.org> <CA%2BtpaK06bbFat--1xYDnWnShNziV3z9F5X3kwiY1APQxB55G0Q@mail.gmail.com>
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On Jan 4, 2016, at 22:40, Adam Vande More <amvandemore@gmail.com> wrote: > On Mon, Jan 4, 2016 at 9:06 PM, Paul Kraus <paul@kraus-haus.org> wrote: > >> I have a file server that I am going through the task of optimizing for >> NFS traffic (to store VM images). My first attempt, because I knew about >> the need for an SSD based SLOG for the ZIL was using a pair of Intel 535 >> series SSD’s. The performance with the SLOG/ZIL on the SSD was _worse_. >> Turns out that those SSD’s have poor small block (8 KB) random write >> performance (not well advertised). So I asked for advice for choosing a >> _fast_ SSD on the OpenZFS list and had a number of people recommend the >> Intel DC-Sxxxx series of SSDs. > Something like zeusram or ddrdrive is probably going to yield the most > preformant solution for zfs sync writes. Agreed, but I don’t have the budget for that :-( -- Paul Kraus paul@kraus-haus.orghome | help
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