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 Jun 26 09:40:42 2026 Auto Mode Machine = Linux oleg133-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-oleg133-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 1871 11269 666414 481234 64 8 8405 28292 763021 733819 64 16 8005 32436 633392 1421755 64 32 3844 64779 1304314 998622 64 64 2759 54418 598110 1210227 128 4 4910 11898 627328 367768 128 8 6339 12181 203838 800337 128 16 8232 34096 359398 789741 128 32 5038 25843 1254941 544601 128 64 9907 64676 969421 1291158 128 128 4748 38461 711270 2843510 256 4 6974 2489 359014 284073 256 8 6371 12879 481109 214928 256 16 12193 12200 137345 941213 256 32 9111 23374 719277 116574 256 64 6765 73459 1422540 1219045 256 128 7170 76375 1347557 1168627 256 256 14328 60694 947860 2049885 512 4 8926 3846 179528 573303 512 8 9903 4893 155718 249538 512 16 19523 20603 303496 633699 512 32 22111 49230 802555 744153 512 64 29372 81959 1251589 519870 512 128 14446 31472 1518938 875164 512 256 21719 95254 1000315 1248678 512 512 12661 35942 1336492 1741948 1024 4 7753 5390 160903 176277 1024 8 14298 20161 358786 185137 1024 16 17743 27290 777537 333879 1024 32 18003 33286 1283303 239864 1024 64 28232 64823 1475525 698050 1024 128 25105 51215 1144163 588528 1024 256 46336 102706 1482144 1273788 1024 512 36837 94709 441559 1309518 2048 4 8125 10199 649532 223511 2048 8 8033 10457 205708 797816 2048 16 11854 21846 611348 507685 2048 32 25172 33109 1067230 457062 2048 64 26069 62057 1365257 1030115 2048 128 36171 31899 291779 113822 2048 256 21144 30293 1354493 1392253 2048 512 29973 47829 1906837 762749 4096 4 5378 4768 213645 145978 4096 8 8084 11595 519000 468220 4096 16 16841 29873 699454 509398 4096 32 30704 24722 1215774 322113 4096 64 20484 30959 663422 814142 4096 128 33202 39395 1301524 699711 4096 256 32456 49287 538371 1288831 4096 512 43650 74043 1062006 668404 8192 4 5503 6790 276486 218867 8192 8 15005 14149 537881 442308 8192 16 19530 27562 693830 372924 8192 32 25527 28176 688395 726562 8192 64 27718 42375 974196 764674 8192 128 34860 43290 383450 424877 8192 256 23648 55087 637107 586525 8192 512 39842 61137 789356 894509 16384 4 8084 8380 400391 457782 16384 8 14975 11895 533682 508408 16384 16 20276 23990 779416 840113 16384 32 24407 24686 872508 816419 16384 64 27292 30450 751280 324654 16384 128 39351 41546 765644 753256 16384 256 37218 56158 703330 318184 16384 512 44306 73827 1079598 1284000 32768 4 8279 5903 331130 417310 32768 8 11018 11700 410631 268575 32768 16 16661 18288 827891 643357 32768 32 19674 30553 480667 583756 32768 64 31021 35551 778894 450469 32768 128