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 Aug 24 08:42:42 2026 Auto Mode Machine = Linux oleg152-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-oleg152-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 2985 11327 608965 666414 64 8 1760 8618 877797 829001 64 16 2299 39846 969761 998622 64 32 2812 40685 1392258 1357066 64 64 1630 42637 1304314 1679761 128 4 6156 10807 526961 329812 128 8 6204 25739 564055 208509 128 16 6536 7549 1858934 1085013 128 32 3906 44046 1508887 428193 128 64 6319 30814 561694 1557024 128 128 4520 35456 1440082 2035099 256 4 6857 12318 577962 284449 256 8 6538 20506 363634 491458 256 16 6492 16764 565185 497147 256 32 5402 26984 1112909 366239 256 64 7629 25488 1075025 1254656 256 128 5294 98311 1108314 1347557 256 256 9048 23048 886067 98691 512 4 9116 4712 70040 565751 512 8 15286 22578 595397 535558 512 16 15513 26700 536092 880908 512 32 17880 27388 610982 168763 512 64 12723 51312 599386 1078159 512 128 14938 21893 1387437 536762 512 256 12064 29212 1380303 1437592 512 512 7963 25169 659788 1856390 1024 4 4143 5912 506672 504411 1024 8 6212 10089 879790 238757 1024 16 21060 11091 759659 375900 1024 32 24080 34245 247337 761410 1024 64 12785 49554 1503942 191724 1024 128 8533 54888 1296474 1270397 1024 256 11935 36948 1119120 335078 1024 512 14773 60667 801179 468688 2048 4 4262 3597 120954 250028 2048 8 4875 8333 432528 179838 2048 16 8559 10266 525256 201633 2048 32 9638 28331 249752 1121576 2048 64 11694 22293 583483 405131 2048 128 13413 64394 1408461 224739 2048 256 22941 31868 408697 510733 2048 512 15501 39317 207858 193847 4096 4 4566 4798 255619 168234 4096 8 4036 7581 199766 105577 4096 16 32338 26433 435420 268873 4096 32 18003 19088 401175 394986 4096 64 35205 26414 449854 242110 4096 128 20311 47220 741764 341787 4096 256 1123 28546 717477 262902 4096 512 32526 40823 1737656 416766 8192 4 4371 4793 270345 156907 8192 8 8512 8372 296703 297977 8192 16 11550 21749 1086343 758814 8192 32 26361 18776 416871 583934 8192 64 31165 40985 434774 504090 8192 128 40803 45582 522114 467417 8192 256 26861 34935 1128072 671642 8192 512 33524 56607 1004177 578283 16384 4 6208 6947 251473 326322 16384 8 8589 8248 277004 276948 16384 16 13853 13608 545605 623273 16384 32 26572 24440 452546 360104 16384 64 22162 39538 1106062 603438 16384 128 33807 37722 1207536 676940 16384 256 31332 56554 758444 863453 16384 512 32732 32176 598477 268286 32768 4 5250 7294 363361 255347 32768 8 10697 11568 405398 331234 32768 16 20642 23582 747886 647512 32768 32 27879 25610 341458 535415