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 Apr 10 20:19:22 2026 Auto Mode Machine = Linux oleg203-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-oleg203-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 2271 13029 645579 533875 64 8 2875 23247 866463 760859 64 16 5684 32471 1226821 1183548 64 32 4854 41260 1033216 2006158 64 64 4422 61135 1553394 1638743 128 4 2672 10348 761728 522346 128 8 10609 19053 955616 1152564 128 16 6559 33298 1155043 907174 128 32 16890 32210 962469 1076312 128 64 15736 30368 1440082 514339 128 128 16987 151666 1663139 908709 256 4 5999 11287 632056 387939 256 8 4247 25440 267779 721210 256 16 11163 20162 1067543 844929 256 32 18277 68927 311427 590031 256 64 15714 119174 371561 1158540 256 128 14695 71645 1471270 1274008 256 256 11853 103266 1579483 1619994 512 4 7211 5911 649806 812577 512 8 18507 19343 250499 817837 512 16 28477 35955 1073309 619978 512 32 38882 58782 1368865 2039772 512 64 17258 119818 1145443 1084694 512 128 33556 145989 1695195 768934 512 256 15351 72954 1759070 572081 512 512 23246 77237 1662389 3388236 1024 4 8416 7953 874417 158020 1024 8 16553 13817 210777 328090 1024 16 18143 34622 367568 284683 1024 32 26675 32329 1120288 801328 1024 64 54404 40735 1208894 971534 1024 128 26659 87268 903099 490415 1024 256 33597 123746 2491561 1408737 1024 512 46316 142719 636781 1787480 2048 4 5782 8134 152231 514712 2048 8 11607 17993 720885 428088 2048 16 14988 29380 1165715 1158327 2048 32 31718 38179 937274 1068957 2048 64 30298 21363 1028019 783767 2048 128 26600 65239 344440 348238 2048 256 72039 83046 894337 2031771 2048 512 43749 107874 872534 799078 4096 4 8323 8129 401372 323533 4096 8 15219 17203 475556 529608 4096 16 21942 22006 610800 495528 4096 32 27834 32752 1424792 672143 4096 64 31365 40417 1235268 1563397 4096 128 37750 45056 1630617 872216 4096 256 39857 65164 374919 375714 4096 512 48314 62370 846599 709653 8192 4 9443 9461 284534 262842 8192 8 13449 15294 544797 383304 8192 16 15882 28752 746353 646007 8192 32 4113 35739 1076641 809420 8192 64 35307 43841 1168269 1014255 8192 128 53861 59055 1292554 859341 8192 256 44728 60066 951455 1065259 8192 512 51496 59763 1388002 1245919 16384 4 9838 10470 393515 362125 16384 8 17121 18342 381351 430419 16384 16 27100 32375 790089 637136 16384 32 33736 43678 416103 405554 16384 64 40620 52146 723486 561420 16384 128 60767 55420 1065206 1014117 16384 256 52576 73351 992427 832692 16384 512 52848 86192 953552 845717 32768 4 9032 9157 581199 532387 32768 8 13529 14494 421958 354184 32768 16 22632 27737 824707 638802 32768 32 32647 40466 1054207 626720 32768 64 32617 47032 1222638 727822 32768 128 45673 67593 1686206 1521978 32768 256 72221 77222 1442568 840765 32768 512 59395 76610 2105640 1461357 65536 4 11394 10808 437078 413424 65536 8