Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Mon Mar 2 02:25:28 2026 Auto Mode Machine = Linux oleg327-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg327-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 2353 9942 131148 59417 64 8 3728 18053 33280 231050 64 16 5709 42188 463774 520419 64 32 4249 20929 516414 666414 64 64 6748 103570 926260 1033216 128 4 4134 4713 132110 37826 128 8 2670 4755 234871 89080 128 16 9790 39168 228961 396271 128 32 12589 45977 590094 516318 128 64 5139 25636 695603 771581 128 128 8689 68011 1319723 1967960 256 4 7341 10553 140435 58232 256 8 8851 16384 225348 133536 256 16 16385 17487 346949 309185 256 32 19831 91821 383779 301883 256 64 18167 64242 613985 306275 256 128 15750 113027 1588832 1391207 256 256 21529 62362 636930 1048775 512 4 9929 7705 66107 31562 512 8 15224 13845 135883 223980 512 16 9456 36120 477557 434642 512 32 30295 46205 196317 387296 512 64 19513 46352 876593 786680 512 128 23420 92254 534491 1319250 512 256 14361 124269 1286838 382672 512 512 16441 94135 41440 1556366 1024 4 9542 12415 79250 59224 1024 8 9770 17743 119040 74380 1024 16 19233 26628 536682 300645 1024 32 20873 54859 490696 260556 1024 64 35133 58809 509921 263919 1024 128 43150 50753 489242 589174 1024 256 50530 101394 900637 773476 1024 512 33638 89447 1141730 1041758 2048 4 5244 7363 62372 62358 2048 8 10656 15051 184837 168572 2048 16 23744 25573 297808 238055 2048 32 30477 32910 339458 436396 2048 64 31059 39064 615951 668435 2048 128 46372 71242 558484 1042872 2048 256 32395 77420 1046046 517940 2048 512 46208 123040 249302 314398 4096 4 8207 8250 49958 85072 4096 8 15916 15467 75843 138810 4096 16 14434 17065 275973 262481 4096 32 29474 31467 216137 178590 4096 64 33582 45026 369238 432428 4096 128 37099 51787 395368 443342 4096 256 56404 48917 402595 816269 4096 512 46750 84309 1885658 1446871 8192 4 8286 10226 53739 3523 8192 8 13437 14603 160410 135541 8192 16 20613 23371 142645 229011 8192 32 24669 37175 336758 421660 8192 64 31775 61887 303982 452800 8192 128 48816 51968 734373 478642 8192 256 33475 58761 583765 786393 8192 512 36780 62636 404347 630930 16384 4 6917 8967 74245 107448 16384 8 12356 13575 141302 162892 16384 16 20928 24645 178720 240061 16384 32 41374 40290 484876 275332 16384 64 44276 40058 966317 481911 16384 128 43731 69942 918490 607444 16384 256 52050 74072 577936 495344 16384 512 54327 73872 1428922 888459 32768 4 8220 9725 76226 88304 32768 8 14372 16884 131629 124246 32768 16 26957 25453 266773 145366 32768 32 30379 33295 375302 301115 32768 64 34551 61239 557903 359755 32768 128 43538 46228 280336 423522 32768 256 36870 56463 1259581 604061 32768 512 47198 67601 923637 610875 65536 4