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 Sep 22 14:14:11 2026 Auto Mode Machine = Linux oleg338-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-oleg338-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 1825 11289 608965 627470 64 8 1313 9569 151333 831569 64 16 3450 22338 1143223 866463 64 32 2820 70329 942521 1066042 64 64 7927 91031 1648808 1599680 128 4 4662 7745 503723 186296 128 8 5160 9744 573699 576161 128 16 8241 48376 848397 597981 128 32 9698 9826 30224 962469 128 64 10003 47604 444501 662962 128 128 5267 101741 1196221 889145 256 4 6794 9454 543445 445202 256 8 4591 7194 436870 155057 256 16 5631 20174 977189 519266 256 32 10684 58157 1479379 901693 256 64 9143 11810 1376935 1325925 256 128 13021 31805 1325925 1652404 256 256 24471 108658 1639786 1361224 512 4 5720 4875 297484 504008 512 8 7732 30177 820337 711133 512 16 4779 10006 517739 808904 512 32 14113 31834 520879 269486 512 64 11856 83991 1434711 308422 512 128 8565 28289 121589 120979 512 256 16636 62257 1689859 1451192 512 512 40748 130183 1662389 355319 1024 4 10565 6140 702273 137360 1024 8 9767 17428 501232 284137 1024 16 14982 12322 773337 163606 1024 32 16004 54865 1357961 1092642 1024 64 28387 19558 1115342 523725 1024 128 19162 71663 1321200 1045817 1024 256 27239 38944 1444266 1512415 1024 512 19131 85762 1324868 246330 2048 4 4651 7591 218174 109919 2048 8 10146 12010 936048 826845 2048 16 9490 17340 467484 165188 2048 32 9952 22436 1284033 1104132 2048 64 16718 20201 1455722 860128 2048 128 30980 33905 146513 852615 2048 256 22413 31760 600576 616880 2048 512 27043 50432 262425 798706 4096 4 1378 6293 379784 402991 4096 8 12229 16627 361226 414904 4096 16 20268 19718 697297 530017 4096 32 27060 27195 537025 420273 4096 64 22876 45477 564184 558807 4096 128 27795 32590 576586 620059 4096 256 25663 54306 1298671 356978 4096 512 31146 85035 565037 428984 8192 4 7345 5709 260368 181503 8192 8 10377 12822 370492 320200 8192 16 11924 14184 705107 482900 8192 32 18256 20909 614688 431433 8192 64 23162 31946 825304 783095 8192 128 32161 42763 715324 618494 8192 256 26599 35469 435767 304432 8192 512 29904 44525 754548 790046 16384 4 6079 6275 401232 296542 16384 8 10776 10263 659528 216275 16384 16 14182 16546 457514 343869 16384 32 18094 22522 767328 275992 16384 64 27818 24430 362605 426434 16384 128 27222 34272 1011729 852178 16384 256 40830 58499 637260 786022 16384 512 45865 48226 618471 628943 32768 4 6460 6670 185089 226379 32768 8