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: Tue Sep 15 01:02:06 2026 Auto Mode Machine = Linux oleg637-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-oleg637-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 3720 7766 120547 474430 64 8 3388 16567 942521 477808 64 16 7647 37471 1017549 926260 64 32 5309 70644 1392258 1017549 64 64 5064 67229 421534 1648808 128 4 5610 7479 215454 571257 128 8 6718 17169 462100 739689 128 16 3071 53623 1243315 447464 128 32 11205 73515 1172704 969421 128 64 10731 95582 1240443 1526043 128 128 17112 122718 1209698 805138 256 4 6676 7356 461267 566377 256 8 7613 16686 799625 196447 256 16 14726 31215 1076103 987979 256 32 11842 36291 204802 773140 256 64 20957 61172 1292410 1231629 256 128 14717 74011 1471270 1561112 256 256 12809 153111 1300235 1952947 512 4 4234 6049 485328 577776 512 8 14601 14926 103265 703445 512 16 12337 17475 538918 949875 512 32 24685 14538 523035 1137555 512 64 28054 82982 1492545 1267845 512 128 13934 18479 963945 1070633 512 256 27614 98518 810124 63761 512 512 8424 44046 857345 1026126 1024 4 7036 5218 220550 538364 1024 8 8453 6262 848337 427538 1024 16 16915 20745 251981 298971 1024 32 22861 14476 254413 231624 1024 64 10577 24129 326221 68075 1024 128 28506 37287 415582 691977 1024 256 20544 51102 784067 1048113 1024 512 45281 103049 151030 883409 2048 4 4668 4740 154601 117302 2048 8 6417 9991 430620 169130 2048 16 13346 19187 428900 492321 2048 32 12746 15312 375224 1067230 2048 64 20044 46845 708167 476720 2048 128 11351 43933 987484 404750 2048 256 24983 28594 546127 723679 2048 512 24499 59633 400541 799375 4096 4 5760 1061 353162 147263 4096 8 10760 14117 187116 156044 4096 16 13569 15308 342960 556220 4096 32 17682 17426 284167 385719 4096 64 23296 25825 623728 397978 4096 128 19854 29358 365779 678917 4096 256 35980 37593 631617 334780 4096 512 25063 30383 207476 661608 8192 4 4617 6477 177904 169767 8192 8 5737 6743 593495 358045 8192 16 11084 13584 472865 415244 8192 32 23259 28997 498539 526983 8192 64 25442 33363 477054 368893 8192 128 31152 39126 514892 1110786 8192 256 26307 43530 474484 328506 8192 512 40041 40628 562216 387035 16384 4 5419 6907 243356 177530 16384 8 10214 13626 575502 395310 16384 16 13846 19039 548217 415301 16384 32 22357 28983 749224 648744 16384 64 27108 38490 839857 636646 16384 128 26980 44788 782870 370336 16384 256 30857 47408 896526 767079 16384 512 57948 51218 1057844 845978 32768 4 5239 5550 188982 175769 32768 8