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

[Tobias Oetiker]

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
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