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 11 12:10:53 2026 Auto Mode Machine = Linux oleg349-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-oleg349-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 4208 14503 432398 566551 64 8 3941 24853 340306 1138375 64 16 4354 36612 383038 659861 64 32 6894 17495 653436 1392258 64 64 4476 60041 1734015 1879725 128 4 6931 11006 381082 304037 128 8 7494 18040 680612 795593 128 16 6163 9947 976473 606082 128 32 9302 53177 1206978 1373754 128 64 10242 71833 883293 1504659 128 128 10097 54077 1471662 2027414 256 4 6458 8424 656399 207133 256 8 7673 18728 917096 1286217 256 16 13004 45357 1040643 802014 256 32 17587 33617 1248819 476624 256 64 15412 49981 1581810 204959 256 128 17787 88426 86453 1570244 256 256 11827 67976 117647 1339154 512 4 5494 10611 597385 164107 512 8 15503 17146 606667 690996 512 16 18836 43663 591951 565751 512 32 17898 59840 1160923 1233614 512 64 15712 82314 1221684 1057974 512 128 28460 89248 1683237 949875 512 256 36430 83755 1442420 785241 512 512 30297 84031 1902438 2116152 1024 4 9925 12112 600963 557440 1024 8 12708 24617 853903 301088 1024 16 26863 26729 935151 545822 1024 32 26511 26306 1119120 823136 1024 64 37887 78642 1471481 1142641 1024 128 37159 79987 901394 699870 1024 256 28974 104511 1446211 1490373 1024 512 40994 105543 930088 840041 2048 4 11390 11544 546440 454210 2048 8 18713 23826 692579 512256 2048 16 27108 43176 743923 715064 2048 32 34092 55245 1397918 643401 2048 64 42334 62427 1013824 519537 2048 128 60091 55756 1436250 643594 2048 256 25499 46755 1325646 1720807 2048 512 27304 109607 1542232 1664778 4096 4 12164 10209 559790 410257 4096 8 17801 22093 315071 483085 4096 16 22284 38944 1000003 541664 4096 32 31827 35911 1112483 823982 4096 64 48807 63198 1328086 481825 4096 128 58958 92460 1264545 1161288 4096 256 51751 102571 1415868 1194805 4096 512 65272 94063 1715961 815765 8192 4 10133 11134 449001 296304 8192 8 20828 21096 624724 608710 8192 16 31554 33387 624202 730579 8192 32 35020 55685 896680 977328 8192 64 49549 58366 729292 923579 8192 128 40525 72852 823800 635387 8192 256 62022 58692 1029912 1298023 8192 512 61549 60907 1521567 1225610 16384 4 9729 10693 501500 467900 16384 8 13525 15406 727268 687416 16384 16 21497 26465 1182172 799065 16384 32 6997 54936 1241481 1189560 16384 64 52362 51513 1107025 809370 16384 128 53284 61171 1441874 808846 16384 256 40542 66746 1525953 1554746 16384 512 38501 53440 1508931 1051547 32768 4 10135 10503 516119 572235 32768 8 16075 17097 950622 615639 32768 16 24480 26510 827537 859461 32768 32 48217 44909 1253938 879064 32768 64 49874 75596 1076223 895252 32768 128 58680 81346 1428726 1128335 32768 256 67836 78639 1455184 1002298 32768 512 58692 83435 1438702 878828 65536 4 11626 12485 614824 413698 65536 8 19305 19228 785370 726360 65536 16 27714 34012 1082167 768749 65536 32 36839 45935 1440699 976077 65536 64 51157 63657 1330034 1186389 65536 128 63881 85898 1440510 1455475 65536 256 63670 84467