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: Sun Sep 6 22:47:45 2026 Auto Mode Machine = Linux oleg259-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-oleg259-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 2895 9375 561808 174898 64 8 3277 15756 913649 681644 64 16 4304 34935 1188789 1017549 64 32 5805 15541 1255511 842003 64 64 2394 57544 809014 286849 128 4 4506 23439 826202 574312 128 8 10050 13624 895074 739689 128 16 14331 49495 780556 859260 128 32 10279 68813 700139 1451764 128 64 8144 86538 490380 948860 128 128 18002 66943 2211113 1123617 256 4 12013 21130 914752 492134 256 8 7696 11624 750445 717355 256 16 11448 34735 1093639 897923 256 32 7288 34882 1206714 1540948 256 64 19117 76669 1384034 1332507 256 128 14571 97481 1639786 1570244 256 256 21340 76120 1534342 3009318 512 4 12514 18965 74441 369186 512 8 21038 21355 649020 120382 512 16 26217 34318 1091863 322842 512 32 24905 21344 1391933 1185272 512 64 26832 96149 1391032 1391032 512 128 22850 71012 1783912 991998 512 256 22089 75063 1760512 960496 512 512 16154 89352 2368185 1541840 1024 4 16462 7461 149928 556212 1024 8 7465 22187 210828 633213 1024 16 20575 18044 260493 409754 1024 32 14438 18203 507691 519292 1024 64 18974 44111 714659 612446 1024 128 33613 23121 515057 1121751 1024 256 38529 77271 1612342 1370965 1024 512 31009 89983 1450607 1703807 2048 4 5352 7290 102456 209281 2048 8 10845 18406 847316 492547 2048 16 20744 30525 1184523 864804 2048 32 29410 37270 843821 1050781 2048 64 30564 41170 634842 1061166 2048 128 27891 41741 676756 504317 2048 256 26825 59988 1132668 363121 2048 512 35848 47592 1591375 611000 4096 4 7166 7575 253746 240389 4096 8 14291 12800 273413 630620 4096 16 19431 35226 497566 242096 4096 32 33086 33428 634838 238500 4096 64 51401 39270 789668 552322 4096 128 41660 68817 1375511 737624 4096 256 28042 61620 1364477 821696 4096 512 42939 59824 432058 515605 8192 4 6695 7413 214516 241226 8192 8 12714 10290 434862 441620 8192 16 13518 17735 511870 451972 8192 32 25332 26374 576333 456967 8192 64 25160 47528 1054309 819126 8192 128 29496 51281 1823687 1156433 8192 256 27355 40369 547479 470592 8192 512 2654 50681 377112 1065259 16384 4 5163 8621 390077 434449 16384 8 11974 10228 238544 252512 16384 16 21787 19887 753942 962527 16384 32 26276 22913 452272 827309 16384 64 28043 44789 991597 912454 16384 128 22765 44654 585645 691921 16384 256 41154 35021 1811180 804161 16384 512 30807 41120 590034 461195 32768 4 6406 8313 547996 337796 32768 8 14114 15963 351116 460677 32768 16 22362 33452 666736 342224 32768 32 32395 44792 1426739 1040984 32768 64 39251 52575 1043870 937089 32768 128 40185 50257 806794 400346 32768 256 40038 44671 1158328 1203379 32768 512 55287 46796 1090155 670143 65536 4