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: Fri Sep 18 20:38:39 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 1347 6069 727850 577521 64 8 4552 19446 651849 165007 64 16 3209 10184 1033216 735831 64 32 3700 12383 555990 397208 64 64 2842 28493 1484662 1070292 128 4 1644 5310 387966 183683 128 8 6981 6657 621518 558771 128 16 4059 13675 1196221 985435 128 32 5895 7079 514339 990891 128 64 8289 59147 1183041 1332828 128 128 2555 32038 1561553 128382 256 4 2716 8689 75051 389629 256 8 4663 10325 509895 682691 256 16 12521 32648 541253 757326 256 32 6710 16862 1117543 847597 256 64 14140 59039 1123389 1049800 256 128 12791 61554 237248 1080434 256 256 14153 77198 1339154 1306564 512 4 3769 6972 472306 312597 512 8 4570 12030 610114 95254 512 16 14579 30303 474078 263662 512 32 14326 27889 788702 506983 512 64 18505 53078 1260404 177466 512 128 15041 46839 694797 1254513 512 256 21898 29195 1180062 361115 512 512 8382 83906 1379416 1910902 1024 4 6661 9468 597452 391134 1024 8 7644 9967 671004 394438 1024 16 4881 21200 608110 108946 1024 32 19603 16186 1119120 308617 1024 64 12377 40302 584842 366877 1024 128 27523 64309 1418039 708646 1024 256 32946 52210 877454 1002137 1024 512 33205 58874 557729 1114185 2048 4 5308 8966 194625 324616 2048 8 14227 13832 451512 393243 2048 16 9923 14086 950339 792224 2048 32 15738 27975 277355 137386 2048 64 19253 48509 324309 349713 2048 128 30138 34362 989417 1162875 2048 256 18179 45221 383808 793761 2048 512 17059 45801 1442279 1423162 4096 4 5253 3924 149564 123802 4096 8 5733 7380 492968 122093 4096 16 8647 18831 370512 281573 4096 32 14074 20189 357475 521442 4096 64 38275 37650 494572 335054 4096 128 29202 24828 315877 495714 4096 256 25202 34813 457302 211765 4096 512 23974 62961 543807 569439 8192 4 6412 2265 302534 251079 8192 8 12958 12092 398213 250045 8192 16 21483 25335 428362 340425 8192 32 24509 25864 872499 395786 8192 64 19468 30640 1027080 615712 8192 128 21607 50694 972129 667531 8192 256 31849 40995 661122 1013358 8192 512 34163 33651 483417 426798 16384 4 5703 6790 249870 284958 16384 8 10812 12234 637012 488929 16384 16 17109 14465 331968 324249 16384 32 17593 13747 615590 482604 16384 64 27851 33352 758168 748987 16384 128 19082 30713 1239801 620958 16384 256 28273 31641 594228 662913 16384 512 28197 41978 516226 755791 32768 4 6661 7493 302126 252253 32768 8 8870 11716 407552 503650 32768 16 15984 17189 388748 377172 32768 32 23379 20494 475539 458755 32768 64 20269 25648 325444 451879 32768 128