Re: [Lse-tech] Re: ext3 performance bottleneck as the number of spindles gets large

[kwijibo@zianet.com]

This web site may be of interest for this discussion:
http://labs.zianet.com.  I have benchmarks using NFS
with ext3 there.  It also compares ext3 with ReiserFS.
The page is not quite complete but it has the
benchmarks up.

Steven

Duc Vianney wrote:

>Andrew Morton wrote:
>  
>
>>If you have time, please test ext2 and/or reiserfs and/or ext3
>>in writeback mode.
>>    
>>
>I ran IOzone on ext2fs, ext3fs, JFS, and Reiserfs on an SMP 4-way
>500MHz, 2.5GB RAM, two 9.1GB SCSI drives. The test partition is 1GB,
>test file size is 128MB, test block size is 4KB, and IO threads varies
>from 1 to 6. When comparing with other file system for this test
>environment, the results on a 2.5.19 SMP kernel show ext3fs is having
>performance problem with Writes and in particularly, with Random Write.
>I think the BKL contention patch would help ext3fs, but I need to verify
>it first.
>
>The following data are throughput in MB/sec obtained from IOzone
>benchmark running on all file systems installed with default options.
>
>
>Kernels           2519smp4   2519smp4   2519smp4   2519smp4
>No of threads=1   ext2-1t    jfs-1t     ext3-1t    reiserfs-1t
>
>Initial write     138010     111023      29808      48170
>Rewrite           205736     204538     119543     142765
>Read              236500     237235     231860     236959
>Re-read           242927     243577     240284     242776
>Random read       204292     206010     201664     207219
>Random write      180144     180461       1090     121676
>
>No of threads=2  ext2-2t     jfs-2t     ext3-2t    reiserfs-2t
>
>Initial write     196477     143395      62248      55260
>Rewrite           261641     261441     126604     205076
>Read              292566     292796     313562     291434
>Re-read           302239     306423     341416     303424
>Random read       296152     295430     316966     288584
>Random write      253026     251013        958     203358
>
>No of threads=4  ext2-4t     jfs-4t    ext3-4t     reiserfs-4t
>
>Initial write      79513     172302      42051      48782
>Rewrite           256568     269840     124912     231395
>Read              290599     303669     327066     283793
>Re-read           289578     303644     327362     287531
>Random read       354011     353455     353806     351671
>Random write      279704     279922       2482     250498
>
>No of threads=6  ext2-6t     jfs-6t    ext3-6t     reiserfs-6t
>
>Initial write      98559      69825      59728      15576
>Rewrite           274993     286987     126048     232193
>Read              330522     326143     332147     326163
>Re-read           339672     328890     333094     326725
>Random read       348059     346154     347901     344927
>Random write      281613     280213       3659     227579
>
>Cheers,
>Duc J Vianney, dvianney@us.ibm.com
>home page: http://www-124.ibm.com/developerworks/opensource/linuxperf/
>project page: http://www-124.ibm.com/developerworks/projects/linuxperf
>
>
>-
>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/
>
>
>  
>