On Wed, 2010-07-21 at 17:12 +0200, Saso Kiselkov wrote:
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> If you plan on using it as a storage server for multimedia data
> (movies), don't even bother considering compression, as most media files
> already come heavily compressed. Dedup might still come in handy, though.
Dedup with uncompressible or pre-compressed data is unlikely to be
useful, for much the same reason that compression isn't going to help.
You don't have repeated data. There might be some commonality in
headers (but even that that is dubious), but the main data will be
different for each of these files.
Dedup only wins when you have significantly similar data in different
files. Even a one byte difference in a compressed stream will ruin the
chance of dedup giving any gains.
- Garrett
>
> - --
> Saso
>
> On 07/21/2010 05:03 PM, Eugen Leitl wrote:
> > On Wed, Jul 21, 2010 at 04:56:26PM +0200, Roy Sigurd Karlsbakk wrote:
> >
> >> It'll probably be ok. If you use lzjb compresion, it'll probably suffice
> >> as well. Give it gzip-9 compression, and you might have a cpu bottleneck,
> >> but then, for most use, that config will probably do. What sort of traffic
> >> do you expect?
> >
> > Thanks for the thumbs-up. Just local GBit LAN. If it does
> > ~20-40 MByte/s it should be quite enough.
> >
>
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