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Hi, just one more idea that came to my mind, |
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reiserfs uses a technique to save small files in the filesystem tree |
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which uses less disk space then. In ext3 a 1 byte file will take up 4k, |
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while this is not the case in reiserfs. |
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This yields a performace hit of about 5% (people say, not that i have |
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measured anything) |
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If you have enough free space you can disable this, make the small files |
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consume more space again and gains some speed improvement. |
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Another thing you could do is disable the writing of accesstimes. |
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Read man mount how to do this. The mount options are noatime,notail. |
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Concerning your observation I would start looking at how the |
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fragmentation is measured. |
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Maybe this also depends on the filesystem implementation in the kernel. |
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Anyway: |
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you can not get much better 1.043.. parts per file. This means that |
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almost every file(96,12 % in your case) is contiguous. |
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have fun |
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|> |
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| |
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| I did a little test. Something fishy here. I did a test with the /data |
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| partition. I store pictures and documents there and it was fragmented. |
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| I cp -av to another reiserfs formatted partition then remade the file |
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| system and copied it back using basically the same command just in |
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| reverse. This is what I got now: |
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| |
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| root@smoker / # /root/fragck.pl /data/ |
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| 3.88457269700333% non contiguous files, 1.04344379261138 average |
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fragments. |
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| root@smoker / # |
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| |
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| That is not a lot better than it was before. It was 4.6% before. How |
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| is that? I copied it over then ran the command right after without even |
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| touching the files. |
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| Any ideas? Is there a limit to the fragmenting "smallness"? |
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| |
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| Dale |
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| |
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| :-) :-) |
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