Date: Mon, 21 Sep 2015 13:58:13 +0100 From: krad <kraduk@gmail.com> To: Sami Halabi <sodynet1@gmail.com> Cc: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: ZFS cpu requirements, with/out compression and/or dedup Message-ID: <CALfReydey%2BHoxdHj-vzgsuKQ15Hoa2gB2SqAA6BWhySfnMPv4g@mail.gmail.com> In-Reply-To: <CAEW%2BogbPswfOWQzbwNZR5qyMrCEfrcSP4Q7%2By4zuKVVD=KNuUA@mail.gmail.com> References: <CAEW%2BogbPswfOWQzbwNZR5qyMrCEfrcSP4Q7%2By4zuKVVD=KNuUA@mail.gmail.com>
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An atom with 2gb of ram in theory is fine to run zfs. What is more important is the workload. If you are going to have 100k iops a second, with lots of synchronous writes then you are going to struggle with an atom, and will need something a lot more beefy. I have a custom built router based on an atom, running zfsonroot freebsd 10.2 backed via an ssd. It runs squid, dns, vpn, dhcp, ip6tunnel, and a small website for about 8 users, and it handles this fine. However there is no massive disk io going on even when we are all heavily browsing. If I tried to use the same hardware for an esx datastor running over iscsi, i would expect it to get a little stressed. On 19 September 2015 at 12:56, Sami Halabi <sodynet1@gmail.com> wrote: > Hi everyone, > I've been searching the documentation, wiki.. etc. but found no rule of > thumb to CPU requirements to run ZFS fs. for memory there are few rules > according to using dedup or not. > > rules of thumb I concluded are so far: > 1. use compression lz4. > 2. use checksum. > 3. disable atime. > > from what i read the status of dedup is not that clear and seems there are > bugs and better to avoid it? > > so according to 1-3 above what cpu requirements i need? is ATOM cpu like > supermicro c2750/3/5/8 enough to run system of 20TB /40TB with 1-3 above? > if dedup IS enabled would it still work fine? > > Thanks in advance, > Sami halabi > _______________________________________________ > freebsd-fs@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" >
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