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 Jun 26 23:26:18 2026 Auto Mode Machine = Linux oleg252-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-oleg252-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 2811 7137 156084 666414 64 8 1559 11806 889431 668072 64 16 8903 44785 1124074 901377 64 32 9362 46076 799377 1232453 64 64 1936 56694 1255511 1638743 128 4 2333 6637 653282 330625 128 8 2817 3859 627328 419822 128 16 2572 27056 1111981 1030846 128 32 4618 47709 535368 522346 128 64 10355 57735 458548 1243315 128 128 19248 159982 551878 1093856 256 4 5169 5053 656399 338207 256 8 3499 16694 615393 799625 256 16 25553 43310 1084800 703260 256 32 20361 51311 1445521 373630 256 64 16276 19427 1243036 1327564 256 128 5318 73752 1523457 1495866 256 256 10384 75425 521536 2102055 512 4 5274 10281 619799 549959 512 8 19549 38297 1267097 705294 512 16 30449 59390 816594 264052 512 32 29122 82488 1221684 635951 512 64 49028 24874 205053 120897 512 128 42581 64916 465044 1674052 512 256 29388 49116 411568 1053304 512 512 60463 105720 487642 2198475 1024 4 9445 8884 310581 887975 1024 8 12220 17234 1299612 550862 1024 16 26772 32873 842017 503938 1024 32 31778 51937 551995 220596 1024 64 32372 58004 143698 833843 1024 128 33857 35034 1322828 198796 1024 256 24480 47359 533549 217501 1024 512 68558 79317 886509 957030 2048 4 10596 9809 357737 218685 2048 8 13586 16869 855843 395452 2048 16 19938 14039 420790 190460 2048 32 7656 53525 427470 632086 2048 64 27769 25577 798483 928761 2048 128 23954 13701 1056857 646890 2048 256 40186 151792 651403 595869 2048 512 55169 67942 978039 763902 4096 4 11917 6442 210416 424185 4096 8 8707 6427 369476 212591 4096 16 11878 26503 551506 431982 4096 32 23533 26797 455967 378412 4096 64 28160 38121 813332 710240 4096 128 27036 43429 885432 812064 4096 256 34443 41340 918571 293769 4096 512 35697 56944 1725959 1470651 8192 4 5211 5911 278043 141735 8192 8 7910 10818 229842 333185 8192 16 8901 13854 666069 446017 8192 32 15539 29102 968076 542475 8192 64 26578 49408 595821 507051 8192 128 23402 39487 692125 354553 8192 256 32643 37192 1164468 369810 8192 512 36645 53245 645910 1215765 16384 4 6229 6478 351693 213522 16384 8 7234 8799 355670 174816 16384 16 17223 17000 613261 416535 16384 32 20279 30552 831926 758201 16384 64 21969 26497 539230 639626 16384 128 36054 47015 1014177 712282 16384 256 32705 36607 798480 677728 16384 512 25851 49021 813712 969986 32768 4 3811 4664 224416 209118 32768 8