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: Wed Sep 30 09:01:36 2026 Auto Mode Machine = Linux oleg352-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-oleg352-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 4565 7190 603489 532815 64 8 2913 10149 77766 473593 64 16 5487 14995 645579 735831 64 32 3353 14722 1143223 789967 64 64 2596 45747 1526887 942521 128 4 5373 12580 621518 526961 128 8 4403 10812 290859 852438 128 16 6339 12248 870405 367768 128 32 7281 37601 1231904 1007629 128 64 11760 48481 757430 240231 128 128 5494 40215 1504659 1206978 256 4 2768 5689 479390 119069 256 8 8090 16180 682691 613985 256 16 12838 34957 958864 937924 256 32 20772 39445 1128110 931416 256 64 18339 34900 1280084 261199 256 128 15276 61098 395659 1219045 256 256 13842 39752 753077 2114473 512 4 4568 9503 438368 144877 512 8 7286 7955 594573 364920 512 16 12398 20276 1036527 657163 512 32 12171 53781 732478 1014013 512 64 19556 52783 348515 1261144 512 128 20191 66407 1185272 1323315 512 256 27334 36563 1323315 898225 512 512 18833 58063 365727 1610042 1024 4 8147 6525 176010 188063 1024 8 5995 8354 729964 474068 1024 16 13285 31537 468841 911146 1024 32 31899 51496 190617 971534 1024 64 14114 37590 937805 866304 1024 128 29235 65464 1338494 274161 1024 256 36783 95763 422076 705155 1024 512 24612 97458 1472995 185009 2048 4 9194 7108 240521 241991 2048 8 8426 17905 310635 716615 2048 16 23705 19564 1173038 583127 2048 32 28214 39272 673202 269616 2048 64 25936 27371 402285 356431 2048 128 35898 47392 869619 1314690 2048 256 41287 43511 433161 348238 2048 512 48063 80412 754641 872978 4096 4 8923 11528 269455 168622 4096 8 9074 13959 403550 504062 4096 16 16888 19293 399375 590377 4096 32 20016 31216 450905 379264 4096 64 40426 43192 875237 387625 4096 128 51326 37929 888316 794121 4096 256 34469 80062 430845 426884 4096 512 54658 67661 662144 388651 8192 4 2508 7269 498539 375607 8192 8 17215 25640 299468 221638 8192 16 15828 29852 1197837 997675 8192 32 35565 29844 623296 526951 8192 64 22460 27281 1260500 581483 8192 128 23801 29387 473282 404561 8192 256 22905 28645 517599 877087 8192 512 32216 51969 436836 610256 16384 4 5630 7195 518794 338150 16384 8 14984 13155 747001 711972 16384 16 19178 16664 628511 271689 16384 32 16240 24674 441579 694326 16384 64 26922 35372 565588 950453 16384 128 39427 47073 1193485 994222 16384 256 32449 52400 756557 511538 16384 512 51982 54817 530776 1219234 32768 4 9738 10251 269651 262106 32768 8 16807 13983 356557 286413 32768 16 19267 21879 343530 324271 32768 32 29294 34811 809546 604632 32768 64 32650 55549 1261083 506891 32768 128 41632 53115 725436 551222 32768 256 35980 53622 635776 752283 32768 512 50517 76999 938266 671571 65536 4