Messages in this thread | | | Date | Fri, 21 Jun 2002 17:03:32 -0500 | From | Duc Vianney <> | Subject | [Lse-tech] Re: ext3 performance bottleneck as the number of spindles gets large |
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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
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