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 10 19:16:14 2026 Auto Mode Machine = Linux oleg115-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-oleg115-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 4031 10481 582535 592827 64 8 2230 9811 727850 376589 64 16 1690 4739 111903 886494 64 32 2810 13403 1049372 735831 64 64 1438 51614 1452528 1204796 128 4 1885 4530 132928 65810 128 8 3100 14206 681476 684954 128 16 5908 25896 1240443 680612 128 32 4195 13160 1065630 942199 128 64 3005 26649 444501 1406136 128 128 6386 22245 864797 1240443 256 4 3606 9106 277969 158607 256 8 1964 9334 817898 351262 256 16 6001 9604 380920 595264 256 32 8460 26032 641497 750445 256 64 7323 32791 1190657 1058076 256 128 6739 30050 1376935 721210 256 256 6336 22450 1497953 441359 512 4 7732 3379 626672 126981 512 8 5486 6450 319956 753025 512 16 4787 17441 412517 759685 512 32 12797 41768 1361057 683736 512 64 17720 29360 101063 665720 512 128 14962 23066 645703 374791 512 256 17831 66787 477133 217779 512 512 8200 71328 278720 1488408 1024 4 4917 5355 555637 624014 1024 8 4488 9645 120557 272994 1024 16 4964 15534 846331 794363 1024 32 14747 23456 851195 132096 1024 64 18512 34624 814705 334530 1024 128 11520 25322 344650 486692 1024 256 17525 31655 454888 222654 1024 512 18843 51895 492270 872286 2048 4 5756 4331 417964 327001 2048 8 6854 7436 384099 399609 2048 16 12245 16852 968774 347759 2048 32 19555 14195 211659 910258 2048 64 11619 16679 509703 208874 2048 128 25329 34648 539948 788950 2048 256 18266 33366 1487227 565134 2048 512 16860 31270 733818 366374 4096 4 3746 4635 414704 257836 4096 8 8203 8365 194373 372295 4096 16 12146 12902 680854 257512 4096 32 1541 20204 265630 254883 4096 64 14663 23545 441337 394189 4096 128 17543 28553 848019 262276 4096 256 24190 24650 311174 197141 4096 512 21903 39047 298495 155505 8192 4 4545 4353 390372 149399 8192 8 5385 9316 230358 197649 8192 16 16551 17815 535525 427446 8192 32 14904 16493 1107778 391306 8192 64 22394 19000 577680 427153 8192 128 17980 32656 936875 466224 8192 256 17421 27386 434450 536545 8192 512 25019 42013 947598 759569 16384 4 4454 3953 168199 191877 16384 8 6182 6452 208684 194501 16384 16 10396 12114 477544 332494 16384 32 15121 19594 613633 364939 16384 64 17553 30031 768512 340453 16384 128 32156 27007 399871 379515 16384 256 28183 31439 535616 390738 16384 512 27744 38385 860911 639525 32768 4