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 Aug 27 06:50:19 2026 Auto Mode Machine = Linux oleg610-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-oleg610-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 1990 8686 516414 503814 64 8 1989 3936 913649 821391 64 16 1608 22695 1143223 821391 64 32 1490 30243 1279447 312204 64 64 2304 71187 1599680 105774 128 4 7705 8056 294368 293563 128 8 6022 12509 895074 318465 128 16 4974 34744 1196221 824932 128 32 6115 62384 579270 1196221 128 64 5477 38530 498114 633995 128 128 6878 107939 1637771 1642783 256 4 8560 8377 566377 579209 256 8 13682 9780 138069 435452 256 16 11004 28441 1382252 900936 256 32 17832 44722 1202660 970126 256 64 18542 101710 750445 1195962 256 128 9683 44092 1471270 1415041 256 256 16466 65107 1398455 283473 512 4 6440 15741 311283 415228 512 8 8464 22472 462042 378424 512 16 15950 21384 259614 151212 512 32 14000 57951 1296159 724325 512 64 11881 10386 1556366 1198502 512 128 35281 23753 1365383 1351633 512 256 28321 77858 540545 309756 512 512 35575 113247 823167 1276891 1024 4 7657 13607 149354 140066 1024 8 13693 18569 394293 581437 1024 16 19704 22284 528428 680357 1024 32 12499 26148 644811 902909 1024 64 36052 21490 935151 835953 1024 128 31607 53026 378718 1211622 1024 256 41714 41370 813316 214771 1024 512 26692 104541 1668074 920914 2048 4 10339 6237 429629 156394 2048 8 7073 15571 497915 460640 2048 16 10633 12276 343284 464175 2048 32 19544 23553 817170 1023975 2048 64 23796 48044 804692 742572 2048 128 39882 57799 1025932 578376 2048 256 49022 64056 691464 657436 2048 512 54158 51918 994688 1038459 4096 4 8218 6366 138130 204044 4096 8 15153 9417 162565 298019 4096 16 16358 23322 332493 453093 4096 32 19361 34610 568252 577226 4096 64 32256 24233 772552 749498 4096 128 25935 62913 1141913 1035380 4096 256 31517 57932 954553 821814 4096 512 47999 59489 381200 695180 8192 4 8978 11946 149420 126262 8192 8 11583 11433 367421 356126 8192 16 30472 12070 586315 675404 8192 32 19924 26791 416998 549608 8192 64 20266 32025 1120676 770003 8192 128 29207 58239 504024 355154 8192 256 27310 39005 274695 350267 8192 512 56239 64836 419969 394527 16384 4 8043 8906 141365 177462 16384 8 7469 10488 183675 695268 16384 16 14878 23755 711206 422180 16384 32 29782 25771 621621 578408 16384 64 19292 38252 585979 547810 16384 128 35780 41695 787843 609297 16384 256 30286 48672 1430797 909363 16384 512 33706 54632 1049043 741792 32768 4 5321 6500 298376 209277 32768 8 10504 11612 277692 288972 32768 16 14522 17220 517522 315034 32768 32