Date: Sun, 20 Sep 2015 15:03:38 -0500 From: Linda Kateley <lkateley@kateley.com> To: freebsd-fs@freebsd.org Subject: Re: ZFS cpu requirements, with/out compression and/or dedup Message-ID: <55FF111A.4040300@kateley.com> In-Reply-To: <CAEW%2BogbPswfOWQzbwNZR5qyMrCEfrcSP4Q7%2By4zuKVVD=KNuUA@mail.gmail.com> References: <CAEW%2BogbPswfOWQzbwNZR5qyMrCEfrcSP4Q7%2By4zuKVVD=KNuUA@mail.gmail.com>
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I usually don't worry about CPU much until i start running alot of IO, network or disk. Dedup takes a ton of memory too. Any algorithm for TB's of storage and cpu/ram is usually wrong. CPU and memory are important by data coming in and out.. not data at rest. What kind of data? On 9/19/15 6:56 AM, Sami Halabi 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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