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 Aug 18 20:19:59 2026 Auto Mode Machine = Linux oleg124-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-oleg124-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 3743 9057 561808 586352 64 8 3821 10281 818885 695778 64 16 5079 16284 852702 100620 64 32 2303 44658 1163036 842003 64 64 3231 94525 1255511 1879725 128 4 2868 9227 707520 531131 128 8 9416 17887 348661 328199 128 16 8443 24845 914904 330828 128 32 7104 71594 1165070 404025 128 64 10531 51116 1017175 1281909 128 128 17412 81531 1526043 2140585 256 4 3222 8766 652807 411583 256 8 11082 26359 827989 70157 256 16 14816 22252 1103757 859127 256 32 10176 48321 1356067 1084800 256 64 9243 50833 1298662 996229 256 128 15825 121439 1598292 1208072 256 256 23952 45005 1718521 969251 512 4 10361 5778 591951 527792 512 8 6009 7127 927716 785241 512 16 11173 21678 1180062 887461 512 32 8160 16911 1309596 1152822 512 64 20701 82301 1336492 1270094 512 128 15837 76087 1110496 1376763 512 256 30618 121906 1045103 1150968 512 512 38444 161212 1635797 437208 1024 4 5874 10220 374818 153848 1024 8 9239 8820 458188 326122 1024 16 22626 20241 1102459 239690 1024 32 16467 29719 493742 337050 1024 64 28576 71573 768219 828535 1024 128 33192 98452 1687075 341119 1024 256 25603 53161 1703807 953418 1024 512 21011 81224 292079 584126 2048 4 7478 10354 402436 338735 2048 8 13380 17053 529464 227959 2048 16 20009 19139 1215360 511220 2048 32 21501 31326 677022 459802 2048 64 22926 45483 1025075 980384 2048 128 43498 59043 849075 654281 2048 256 41597 56358 734257 758506 2048 512 36880 64839 412406 319497 4096 4 7320 5991 576722 291298 4096 8 11430 11284 512513 511293 4096 16 15604 23178 467469 477168 4096 32 20591 30814 1313264 563499 4096 64 22340 43845 685965 622959 4096 128 32155 72459 826638 800485 4096 256 34672 52986 1439717 1843372 4096 512 37566 59172 623344 630620 8192 4 2670 6860 354294 331469 8192 8 9771 7633 410526 314690 8192 16 16678 23459 847242 648972 8192 32 24822 29240 659156 788685 8192 64 28498 38923 478335 627508 8192 128 17653 44454 924274 876058 8192 256 29338 38866 822085 628036 8192 512 43171 55401 811561 697251 16384 4 5106 4800 320776 410474 16384 8 6215 8076 319674 243208 16384 16 13624 15075 675403 292409 16384 32 21860 30573 386205 247979 16384 64 26573 46551 769709 586649 16384 128 34420 57464 1048179 676853 16384 256 33120 53469 1175479 746522 16384 512 32759 50808 2150117 1012101 32768 4 6054 4591 272868 178049 32768 8 5701 8915 298346 432335 32768 16