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On Sat, 7 Apr 2007, Willy Tarreau wrote: > Hi Al, > > On Sat, Apr 07, 2007 at 02:32:34PM +0300, Al Boldi wrote: >> Willy Tarreau wrote: >>> >>> ... for some usages (temporary space), >>> light compression can increase speed. For instance, when processing logs, >>> I get better speed by compressing intermediate files with LZO on the fly. >> >> How can you do that on ext3? >> >> Also, can you do that on a partition block-io level? > > No, sorry for the confusion. My scripts simply do : > > $ lzop -cd file1.lzo | process | lzop -c3 > file2.lzo > > With decent CPU, you can reach higher read/write data rates than what a > single off-the-shelf disk can achieve. For this reason, I think that > reiser4 would be worth trying for this particular usage. And in this case, > I'm not interested at all in reliability. It's just temporary storage. If > the disk fails, I throw it away and buy a new one. I see the same thing with my nightly scripts that do syslog analysis, last year I trimmed 2 hours from the nightly run by processing compressed files instead of uncompressed ones (after I did this I configured it to compress the files as they are rolled, but rolling every 5 min the compression takes <20 seconds, so the compression is < 30 min) now I just need to find a version of split that can compress it's output files. David Lang - 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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