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: Sat Aug 22 01:50:41 2026 Auto Mode Machine = Linux oleg619-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-oleg619-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 3193 5285 653436 633392 64 8 2402 14723 712397 889431 64 16 5632 29315 1105556 520419 64 32 4625 27478 1336792 1124074 64 64 6309 62868 1232453 1232453 128 4 4508 8137 281850 513847 128 8 6553 12968 334123 747933 128 16 5810 22691 816154 992724 128 32 2745 12314 313628 990891 128 64 5181 31105 1123617 1440082 128 128 3965 93290 1185654 1642783 256 4 5946 10119 240813 398744 256 8 6853 11365 442815 720726 256 16 7356 10491 666586 603630 256 32 11575 26481 1572543 556687 256 64 19825 36708 1319408 1235882 256 128 11675 76647 1340826 1384034 256 256 13855 75250 1686137 2210228 512 4 7240 5955 250997 442159 512 8 9897 9894 621413 309578 512 16 14510 11362 619978 339104 512 32 25147 34799 1086890 912733 512 64 22787 33775 1051757 791318 512 128 19479 38343 290561 240269 512 256 26208 89167 1143004 1380303 512 512 14599 92856 510478 2099600 1024 4 8190 6432 624376 159274 1024 8 10764 15720 152089 605880 1024 16 19027 27095 363893 831100 1024 32 21860 26650 1217806 844168 1024 64 25305 68697 1488307 1418508 1024 128 29143 58192 1250425 1278338 1024 256 24034 41325 1681132 1654579 1024 512 13084 42096 399836 532226 2048 4 5042 6830 262730 312761 2048 8 8524 16388 553375 376342 2048 16 10949 13052 1230683 577249 2048 32 25906 43931 753780 535538 2048 64 15162 63198 1527152 765331 2048 128 39679 71453 350927 298626 2048 256 21271 35988 1723915 882031 2048 512 54497 76295 1801275 587836 4096 4 6482 6614 475833 315390 4096 8 17587 14051 405101 280589 4096 16 12222 29476 371586 272195 4096 32 20205 23168 502514 476942 4096 64 42014 38175 494088 414324 4096 128 44592 44121 630042 1339476 4096 256 41531 76827 1777753 1002220 4096 512 61516 52704 838827 622305 8192 4 9266 10092 344998 576091 8192 8 13035 12258 290333 299896 8192 16 16353 37093 503566 319412 8192 32 29233 40994 879917 786645 8192 64 26829 49121 390674 572788 8192 128 35107 47282 985202 673788 8192 256 35939 72101 1629210 1065821 8192 512 3172 83632 580373 1649625 16384 4 11432 10389 495030 437896 16384 8 15990 15870 980602 550982 16384 16 24011 28000 780860 703510 16384 32 23148 26977 526207 1038406 16384 64 23647 29783 1093722 394196 16384 128 41580 57994 1457780 1020109 16384 256 48282 49122 773556 910580 16384 512 33221 38703 785268 851428 32768 4 6154 7381 365490 299196 32768 8 11164 13211 484590 507252 32768 16 16880 19439 842776 661394 32768 32 25838 30338 641127 944923 32768 64 32216 36940 1080029 603642 32768 128 32010 46932 569282 464985 32768 256 30918 51505 962128 927639 32768 512 37761 48018 807990 906746 65536 4