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: Fri Aug 21 21:19:09 2026 Auto Mode Machine = Linux oleg354-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-oleg354-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 2411 9936 587635 88046 64 8 3421 6269 752329 520419 64 16 2401 36970 969761 752329 64 32 2812 55213 1279447 969761 64 64 3348 72222 1562436 1163036 128 4 5200 6686 38786 253983 128 8 3944 10721 248573 39285 128 16 3577 25407 617941 789741 128 32 5009 10987 345075 61661 128 64 8434 56088 1206978 1217930 128 128 9360 32420 1543594 450846 256 4 4387 7729 424604 257318 256 8 5524 6442 792543 641497 256 16 7540 27161 600928 867455 256 32 12158 39360 1052888 373111 256 64 5432 33889 1267990 733527 256 128 8864 23211 2034350 1430119 256 256 6304 92821 1076103 1829808 512 4 4076 4294 427716 260149 512 8 8658 6436 286185 688118 512 16 15243 33096 158605 420761 512 32 14903 35278 498509 206611 512 64 25735 49617 808904 324060 512 128 8516 38507 91445 1399189 512 256 17915 33223 1657257 1594501 512 512 10914 72428 1599251 1729323 1024 4 5094 11301 481671 228567 1024 8 10161 12884 336495 183288 1024 16 17475 20452 366909 285953 1024 32 25191 36001 517977 299848 1024 64 29681 28007 1109579 442332 1024 128 25410 77763 1080275 1164956 1024 256 32051 77610 1537317 1217461 1024 512 23914 70112 1250425 762491 2048 4 7146 5327 593481 241481 2048 8 12216 11600 446675 150001 2048 16 9689 13821 273470 499972 2048 32 22105 27406 1496033 425164 2048 64 19128 69868 502958 1123483 2048 128 29724 27652 347407 213915 2048 256 36072 56057 400616 828839 2048 512 25342 46854 1600269 1363307 4096 4 6446 6271 254679 203729 4096 8 8136 11251 978976 158000 4096 16 14700 16725 184098 427383 4096 32 12603 21177 391093 378246 4096 64 23742 29064 1166571 537327 4096 128 20834 23502 799405 214437 4096 256 30807 56639 1063057 616964 4096 512 53270 45938 1628607 1398920 8192 4 5753 8970 387493 333674 8192 8 10149 10273 418746 591819 8192 16 18506 16036 482365 311469 8192 32 27563 29118 284296 465353 8192 64 32247 38248 1094754 659536 8192 128 33855 50983 542586 542698 8192 256 32040 37979 788215 766893 8192 512 35403 51584 1459768 838230 16384 4 7663 7980 212327 330856 16384 8 10684 12848 536335 424312 16384 16 18341 19678 849218 543779 16384 32 20931 39549 588544 316879 16384 64 22568 31661 402534 583576 16384 128 24146 37769 951835 578735 16384 256 29181 36298 1062308 885471 16384 512 29569 45844 527548 582601 32768 4 7308 9342 242082 265446 32768 8 13343 13849 439373 437005 32768 16 17292 18799 544653 517236 32768 32 23294 25950 381630 638541 32768 64 21243 33376 596889 442099 32768 128 32781 45455 1124035 654443 32768 256 37970 46180 570265 921198 32768 512 34137 53684 963964 852467 65536 4