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 04:49:18 2026 Auto Mode Machine = Linux oleg211-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-oleg211-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 1741 3004 688639 520419 64 8 4513 23340 688639 673098 64 16 6442 7138 1119387 955947 64 32 2011 5288 1204796 1101022 64 64 3779 53284 1232453 1780008 128 4 1607 3007 291649 566435 128 8 2311 8121 789741 269539 128 16 4923 24739 895074 703810 128 32 4839 57841 1165070 919605 128 64 5275 74723 2211113 1451764 128 128 4338 62624 1471662 1727352 256 4 7318 5761 651619 87940 256 8 7161 10933 312606 805021 256 16 9847 12986 1132871 474937 256 32 12449 43285 293548 934659 256 64 11266 11522 1163562 1292410 256 128 14813 36394 1461259 1334162 256 256 17947 109311 1558845 2330140 512 4 6557 2365 601737 277962 512 8 4161 6831 409918 779258 512 16 6995 10324 1236455 506983 512 32 14359 31297 645703 1066380 512 64 12478 23489 1286838 1147892 512 128 8993 35368 1387437 1118011 512 256 21408 84727 1734911 1705969 512 512 28265 49321 1500891 286682 1024 4 4155 3746 77657 114787 1024 8 8001 7580 623651 336627 1024 16 20015 24123 459364 744644 1024 32 22036 25958 533284 529210 1024 64 21271 26688 1324868 781641 1024 128 30786 58949 1370527 1183902 1024 256 47495 56904 1099918 495165 1024 512 26099 85891 2060128 474068 2048 4 7418 6990 464627 299021 2048 8 15430 14607 926757 839368 2048 16 15410 22948 415920 458795 2048 32 28743 43058 243114 505296 2048 64 36326 62852 1054134 429543 2048 128 36909 62015 819509 549200 2048 256 33157 75471 1552545 804692 2048 512 47846 64459 588158 408367 4096 4 5760 4420 148266 168698 4096 8 5432 8019 438868 138716 4096 16 10570 14063 367453 636602 4096 32 17413 16525 902597 332390 4096 64 20942 40786 310864 840017 4096 128 18378 42374 1656241 141275 4096 256 38354 36510 356667 523715 4096 512 40542 66759 764473 819345 8192 4 5224 1945 145173 187165 8192 8 8186 8468 471619 236258 8192 16 10737 15606 481830 802276 8192 32 17687 34360 381822 201857 8192 64 17335 26168 588464 395444 8192 128 30696 30880 627405 381839 8192 256 30151 50666 1111073 686785 8192 512 20070 31453 317840 419201 16384 4 3761 4466 205184 146152 16384 8 8461 6358 275689 269744 16384 16 12790 17342 538947 448997 16384 32 19950 16214 418868 513941 16384 64 16136 16390 548492 428338 16384 128 22368 24275 543130 617077 16384 256 27095 20796 595242 507357 16384 512 22579 24945 294320 350962 32768 4 3717 4541 164548 121125 32768 8