Messages in this thread | | | From | root@mauve ... | Subject | Re: Transparent compression in the FS | Date | Wed, 15 Oct 2003 19:54:22 +0100 (BST) |
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> > Erik Mouw writes: > > On Wed, Oct 15, 2003 at 05:50:38PM +0400, Nikita Danilov wrote: > > > Erik Mouw writes: > > > > Nowadays disks are so incredibly cheap, that transparent compression > > > > support is not realy worth it anymore (IMHO). <snip> > > You have a point, but remember that modern IDE drives can do about > > 50MB/s from medium. I don't think you'll find a CPU that is able to > > handle transparent decompression on the fly at 50MB/s, even not with a > > simple compression scheme as used in NTFS (see the NTFS docs on > > SourceForge for details).
I haven't got the original message (mail problems) so I'm responding here.
I misread your message, and thought you said compression. My Duron 1300 (hardly the fastest machine) compresses (gzip -1) at around 40Mb/sec (repetitive log-files that compress to 5% using gzip -1) and 10Mb/sec on text (compressing to 40%).
On expansion, it decompresses compressed text at around 14Mb/sec (resulting in 30Mb/sec, around my disk speed), and logfiles at 110Mb/sec, which is significantly faster.
This is with a single stick of PC133 RAM, and a tiny 64K cache. I would be very surprised if even a high end consumer machine couldn't handle 50Mb/sec. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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