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 02:27:08 2026 Auto Mode Machine = Linux oleg117-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-oleg117-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 4 960 4018 561808 481234 64 8 848 6546 686877 220064 64 16 2178 32836 80591 866463 64 32 2545 45261 1183548 852702 64 64 4411 49878 674790 1138375 128 4 4665 9115 490380 392792 128 8 5581 16299 592699 633247 128 16 2992 19559 354649 289448 128 32 4407 15426 1121270 767171 128 64 6885 11532 1243315 1254941 128 128 9643 55872 231130 942199 256 4 5395 8828 571198 439013 256 8 4309 10235 654798 695966 256 16 9061 22887 904732 966633 256 32 11557 34422 1175022 552675 256 64 13466 66236 661657 1062263 256 128 11573 27374 557844 1340826 256 256 9999 40946 1549845 1415041 512 4 6098 4255 275431 70030 512 8 4232 8972 109734 163358 512 16 11006 19848 602412 151660 512 32 16628 31103 770037 200235 512 64 13566 32983 1171691 835334 512 128 9577 57774 1091863 1364516 512 256 21871 63586 749608 992456 512 512 22769 73059 649609 2081286 1024 4 6098 6717 178645 524364 1024 8 9843 12224 497113 321412 1024 16 10696 12640 980853 182789 1024 32 12634 24376 1164956 183179 1024 64 9896 17382 997019 415100 1024 128 8427 66321 547003 1261072 1024 256 21501 56882 265140 1389594 1024 512 19762 78163 1458489 665287 2048 4 3690 3604 406743 216765 2048 8 7524 6977 176063 709395 2048 16 10745 19387 736713 869707 2048 32 12455 26793 431897 373056 2048 64 18780 15620 1257897 183217 2048 128 32933 59748 605743 762478 2048 256 33509 55629 1555075 1306890 2048 512 44704 75302 1436250 1384623 4096 4 5041 4468 149211 296681 4096 8 5983 8439 635919 279780 4096 16 19592 17028 1335935 730256 4096 32 23928 38489 634041 290373 4096 64 16622 16714 1345140 366435 4096 128 20608 33343 371049 691320 4096 256 15103 31451 781087 524867 4096 512 17680 31163 348004 392603 8192 4 4378 4437 321420 311080 8192 8 9374 8524 349664 355400 8192 16 16672 14619 605598 513922 8192 32 20406 19751 214042 372262 8192 64 18862 21553 782507 402872 8192 128 22925 22774 333211 627737 8192 256 17439 25548 414533 304602 8192 512 20769 28511 599889 590669 16384 4 4079 3970 245692 227533 16384 8 5705 7518 231324 229223 16384 16 10653 13080 409999 417745 16384 32 12249 15193 410749 387062 16384 64 19218 25643 540227 588569 16384 128 20058 34350 952495 380157 16384 256 23211 36005 811933 519815 16384 512 18179 27166 581447 530722 32768 4