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: Sat Aug 22 02:49:39 2026 Auto Mode Machine = Linux oleg157-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-oleg157-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 1140 5507 639427 489126 64 8 1429 8283 799377 615952 64 16 1376 30619 955947 503814 64 32 1505 6348 855419 901377 64 64 2784 34353 743988 1780008 128 4 3878 10381 468553 217726 128 8 3694 11923 785122 524387 128 16 5387 17209 864797 766076 128 32 7165 34033 1048974 847059 128 64 4376 40777 1185654 444501 128 128 6591 78768 1391557 1755594 256 4 5819 3006 124639 263378 256 8 3596 10751 206139 731528 256 16 10368 15027 461267 211042 256 32 9222 21127 1190657 970126 256 64 9803 38822 1274008 1175022 256 128 7470 38520 358534 1439707 256 256 12584 61656 1384034 1549845 512 4 5295 2803 65097 116820 512 8 7197 5038 483906 568899 512 16 5056 8784 891884 80463 512 32 5820 12254 1082507 859060 512 64 8556 14671 1368865 283017 512 128 11470 32040 344988 429170 512 256 12298 22826 1276891 100746 512 512 11647 37550 340232 2265742 1024 4 4799 4388 568282 348283 1024 8 12229 5976 387569 710169 1024 16 9293 13249 946485 399539 1024 32 20717 21168 187579 216166 1024 64 20240 32188 676819 1155864 1024 128 25468 13966 1399100 178489 1024 256 27537 27236 428818 354580 1024 512 27974 61135 645975 646948 2048 4 2535 2697 306402 96708 2048 8 5245 5506 217137 251876 2048 16 6917 10424 597444 451393 2048 32 12263 14972 250393 257872 2048 64 18217 14512 266836 455414 2048 128 16828 41893 520482 267750 2048 256 19524 30981 621207 443012 2048 512 35521 57021 872623 634280 4096 4 6332 3925 221644 140374 4096 8 4454 9044 180654 179743 4096 16 1494 23114 624681 676138 4096 32 12211 19602 259092 250856 4096 64 27809 49018 605035 600572 4096 128 38048 48708 730535 449172 4096 256 31982 62617 743659 510533 4096 512 30666 43866 392639 1120026 8192 4 4387 4388 179578 183183 8192 8 7607 6344 194431 243165 8192 16 12806 23424 208362 346547 8192 32 21587 20290 505395 581040 8192 64 19191 37087 814563 601117 8192 128 29872 24448 329009 433600 8192 256 35826 41267 481284 592973 8192 512 20168 26624 937310 432383 16384 4 3226 4676 134374 188675 16384 8 7325 8143 420318 453471 16384 16 12499 10720 742898 469428 16384 32 13678 18753 460250 274811 16384 64 15937 25334 818997 749224 16384 128 19583 39265 770468 461285 16384 256 28634 40536 781197 789672 16384 512 33387 42660 911546 668602 32768 4 4144 7233 574686 429491 32768 8