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: Wed Sep 9 12:19:48 2026 Auto Mode Machine = Linux oleg148-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-oleg148-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 2121 8551 620221 500060 64 8 2586 19956 780776 226183 64 16 2308 22199 926260 19352 64 32 4817 32389 1421755 998622 64 64 3129 48447 1484662 771797 128 4 2287 5192 297632 650117 128 8 2598 4949 673778 735635 128 16 5976 23730 985435 864797 128 32 3954 23239 985435 213994 128 64 9714 101683 921183 1196221 128 128 8315 54235 1561553 1732927 256 4 5101 8027 628725 481109 256 8 4754 8328 760006 1206714 256 16 15034 45486 952062 1103757 256 32 18062 60835 1274008 1040643 256 64 16027 35714 1398455 1292410 256 128 6559 103355 653204 1400278 256 256 21200 157053 1489641 2065659 512 4 9203 21260 615359 884536 512 8 18998 26472 1410215 884172 512 16 20139 33753 359302 922535 512 32 8299 16657 370459 787834 512 64 16277 100411 1251589 800163 512 128 33797 76532 1985091 1827947 512 256 47477 128033 1492545 1480200 512 512 28951 69640 1729323 2452009 1024 4 14526 7220 197680 261572 1024 8 15332 19011 859026 293235 1024 16 18143 30188 354697 885048 1024 32 25233 34442 635274 736094 1024 64 14241 41783 1233900 214632 1024 128 22493 45917 659768 915809 1024 256 19340 43524 695675 332999 1024 512 13828 18278 347466 494196 2048 4 8112 12217 953398 96155 2048 8 10438 14115 167074 310871 2048 16 15959 18496 192264 219861 2048 32 31892 66047 283226 1134613 2048 64 15370 65487 558811 828200 2048 128 47234 39832 1108120 661894 2048 256 36815 76323 1300361 422966 2048 512 50336 65111 1101583 346706 4096 4 8846 5650 149090 214563 4096 8 7759 13454 336920 199933 4096 16 14268 30148 298958 349491 4096 32 16651 25947 475438 270524 4096 64 56061 71774 1201573 965334 4096 128 38777 23962 1176316 222425 4096 256 41423 126451 1878853 1524415 4096 512 82434 72359 517640 1291641 8192 4 4317 4828 327744 269960 8192 8 7500 9350 367803 353852 8192 16 12235 2518 375969 618361 8192 32 26019 24120 1104502 481203 8192 64 17682 27326 483043 659321 8192 128 69498 48986 900818 465801 8192 256 35104 30028 1090515 842712 8192 512 66635 73366 812367 1069037 16384 4 8846 8518 207054 315848 16384 8 10878 12337 454215 378217 16384 16 10503 13097 689886 565765 16384 32 12817 15183 679524 318488 16384 64 20892 26336 289613 553886 16384 128 17403 22583 594249 291369 16384 256 17113 22584 1007693 802705 16384 512 21747 26114 406439 524973 32768 4 4457 6117 252438 387425 32768 8 7084 11502 791690 513708 32768 16 24679 28912 797603 965779 32768 32 39839 21354 438156 548720 32768 64 19882 29051 1013548 1099530 32768 128