[rrd-users] rrd + zfs compression = massive space savings

Tobias Oetiker tobi at oetiker.ch
Sun Feb 20 08:47:22 CET 2011


Steve,

note that the gain will drop as your rrd files are filling with
actual data ... so make sure you have plenty of free space on that
system !

cheers
tobi

Yesterday Bernard Li wrote:

> Hi Steve:
>
> Thanks for sharing this!
>
> Have you also tried using rrdcached on top of your ZFS setup?  I
> wonder if that would provide any additional benefits.
>
> Cheers,
>
> Bernard
>
> On Sat, Feb 19, 2011 at 10:54 AM, Steven Hartland
> <killing at multiplay.co.uk> wrote:
> > Just wanted to share our experience with using zfs compression
> > on FreeBSD for our rrds.
> >
> > We're seen a fantastic 21.41x compression ratio on our 46k rrds
> > stored on a zfs volume compressed with gzip. This means meaning
> > we're saving 93GB of space by doing this :)
> >
> > The gzip compression is CPU heavy so if you want to use this
> > you need a good amount of CPU available but if your short on
> > IO throughput which tends to be the case when updating this
> > many rrds it also a great way to improve performance.
> >
> >    Regards
> >    Steve
> >
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-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900


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