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: Thu Sep 3 21:34:09 2026 Auto Mode Machine = Linux oleg256-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-oleg256-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 3350 9615 524487 542506 64 8 5603 16697 763021 546928 64 16 8231 23738 889431 789967 64 32 4088 50996 1143223 1101022 64 64 8770 55315 1452528 1392258 128 4 2511 8585 590094 436904 128 8 7557 18787 771581 710329 128 16 12181 41279 985435 785122 128 32 10672 68707 790905 978253 128 64 14540 49808 1067750 1102844 128 128 7924 62837 1521718 615814 256 4 8684 13353 508929 567575 256 8 11252 25125 934659 598249 256 16 15353 39913 1044693 62624 256 32 21574 53479 940389 972763 256 64 15197 80806 1027695 1137672 256 128 18906 54629 489442 999940 256 256 25808 149279 480463 461267 512 4 10487 13385 301875 512060 512 8 17720 24742 730484 293419 512 16 10996 20194 347107 670082 512 32 15989 41922 1343179 104792 512 64 19721 77351 1045103 711133 512 128 29053 80061 547017 1127995 512 256 33630 95900 1589779 712312 512 512 16275 89587 1585086 583110 1024 4 9639 9498 325701 351648 1024 8 16239 20516 513825 285459 1024 16 10461 23247 815323 849848 1024 32 24064 54254 735086 894262 1024 64 40946 72235 1271902 788819 1024 128 25729 74047 1326505 922497 1024 256 28003 104234 1009676 580494 1024 512 38434 83892 726261 777537 2048 4 10227 10267 135826 188965 2048 8 9655 17377 580487 236710 2048 16 18793 29542 982739 891182 2048 32 20122 29043 406185 375913 2048 64 17231 26400 639426 825811 2048 128 15455 41716 795599 342873 2048 256 20982 37649 1445434 506936 2048 512 56404 53088 808555 1354493 4096 4 4595 5862 392451 278203 4096 8 6180 11539 341732 459038 4096 16 10537 11756 383772 361036 4096 32 15937 17107 489541 413855 4096 64 14685 18218 359962 308176 4096 128 30257 55351 1369480 330427 4096 256 21843 32390 797512 306910 4096 512 26014 51967 789849 845058 8192 4 1975 5442 140507 143525 8192 8 7826 10454 313427 250903 8192 16 16255 19481 537183 430817 8192 32 14531 21882 895792 404062 8192 64 29335 36348 442308 597002 8192 128 23933 25621 409313 332331 8192 256 22421 36056 668453 294951 8192 512 27356 53300 464692 818872 16384 4 6419 8177 314393 240386 16384 8 10017 12299 223864 300585 16384 16 18366 13170 213549 191228 16384 32 11230 13938 492546 222228 16384 64 17406 22646 743477 277018 16384 128 20800 22783 628603 421812 16384 256 18149 28252 858652 352048 16384 512 25189 45515 408039 366950 32768 4 3894 6037 248407 217614 32768 8 9484 11972 631207 578439 32768 16