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: Mon Mar 30 08:48:37 2026 Auto Mode Machine = Linux oleg608-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-oleg608-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 3440 13433 608965 586352 64 8 2135 24088 863676 913649 64 16 5220 24625 457452 929467 64 32 3249 38741 1049372 1163036 64 64 3225 40556 1526887 1648808 128 4 2868 4239 408949 516318 128 8 5747 25256 1618028 376538 128 16 10742 28912 700139 680612 128 32 6587 36180 1391557 496272 128 64 5646 21501 1409828 711270 128 128 7359 87726 1603529 1727352 256 4 6394 11171 1230218 305143 256 8 12282 18121 557844 802614 256 16 10355 17594 1108314 1040643 256 32 16411 27184 1108314 972763 256 64 7097 34069 1445521 322754 256 128 20950 66236 1376935 1662639 256 256 15295 96674 1752173 2015259 512 4 5590 11431 530530 567545 512 8 10961 16180 1057454 320003 512 16 17781 25170 850554 979331 512 32 12103 55962 1193175 1017858 512 64 17687 91624 1022219 1700565 512 128 27812 55815 1585086 1418599 512 256 30015 95325 1712772 1760512 512 512 21241 115135 1339827 2263354 1024 4 8233 9382 524877 454888 1024 8 12716 17300 330743 412905 1024 16 10282 19598 1158358 463328 1024 32 21706 28442 1302766 222943 1024 64 27548 70262 1326505 328743 1024 128 25242 58698 1703807 835303 1024 256 35111 55904 299513 1488307 1024 512 28488 100432 1692394 1397280 2048 4 10405 11706 402984 215104 2048 8 16198 17446 442624 653037 2048 16 20334 39690 578844 230374 2048 32 27467 30619 1062741 1234397 2048 64 33537 41066 927558 945944 2048 128 21128 59294 896671 298678 2048 256 39178 77496 1800898 703297 2048 512 46736 88196 531792 610826 4096 4 8934 8607 621922 361393 4096 8 22064 15517 426132 507802 4096 16 25723 41773 622395 590032 4096 32 37039 42652 1102205 751959 4096 64 32960 66547 974533 1058929 4096 128 52320 71628 1136174 658540 4096 256 53543 59791 979702 1109752 4096 512 63660 121302 1259169 676910 8192 4 9876 10955 552204 354389 8192 8 14172 13798 566919 437793 8192 16 22858 29476 954018 686963 8192 32 32029 35396 586445 873631 8192 64 35585 60680 768987 466357 8192 128 39254 58726 1430177 729726 8192 256 42439 65516 868156 567462 8192 512 41213 58467 848560 901030 16384 4 10161 12324 419971 407144 16384 8 4982 21736 531243 676827 16384 16 27557 33540 915163 621947 16384 32 41837 55207 617754 1436059 16384 64 39547 51585 1172891 771515 16384 128 52470 78746 887151 998905 16384 256 71659 60693 1048179 1264020 16384 512 62844 79479 1108078 1091897 32768 4 9897 10989 519970 242758 32768 8 15850 21367 662970 761671 32768 16 24211 32035 702104 666167 32768 32 37766 47537 1034084 965386 32768 64 41319 47194 854848 819670 32768 128 41957 59966 1360178 860888 32768 256 45467 75659 909283 855945 32768 512 59448 78869 1236297 932043 65536 4 9758 10503 400435 356505 65536 8 14353 15202 553513 559071 65536 16 21347 21569 576226 517612 65536 32