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: Mon Jul 13 08:55:30 2026 Auto Mode Machine = Linux oleg247-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-oleg247-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 1272 9312 621657 516414 64 8 5506 24904 863676 546928 64 16 5550 22183 254006 942521 64 32 4859 43388 1002351 1204796 64 64 5474 30812 1049372 1562436 128 4 3538 8006 606767 472262 128 8 2879 15847 907174 748976 128 16 7992 42498 859260 1017175 128 32 5574 21404 921183 985435 128 64 6227 76013 1266785 1165070 128 128 10813 63808 1349580 1561553 256 4 2510 5382 544547 257751 256 8 4321 17441 473889 377572 256 16 12910 18815 535583 1292410 256 32 9278 21073 639967 714967 256 64 4943 15891 50643 513063 256 128 8613 94355 515032 1506359 256 256 8296 43880 1570244 527947 512 4 4544 4949 276317 108916 512 8 4531 5688 885631 287951 512 16 17894 27865 840895 318013 512 32 14989 36855 836636 1135750 512 64 16533 19480 171705 1261144 512 128 12123 26769 320003 460852 512 256 21452 63601 1221684 1575781 512 512 27277 39266 205288 412517 1024 4 2861 7181 209104 262163 1024 8 9028 9674 454070 766437 1024 16 19121 30020 833843 351044 1024 32 28368 44403 760197 580494 1024 64 27740 48979 903860 619156 1024 128 21184 59064 1471481 887242 1024 256 13059 52335 962391 773476 1024 512 16757 75200 992182 930894 2048 4 5692 4612 89241 337843 2048 8 12335 17254 319651 789530 2048 16 21516 21889 1151187 665380 2048 32 11489 36640 720885 626645 2048 64 33353 22932 331493 1213986 2048 128 30884 51426 620399 1267362 2048 256 45418 85368 902606 1425051 2048 512 48742 40527 679056 1529327 4096 4 5372 5288 275694 226773 4096 8 6335 11379 232211 310448 4096 16 9195 13319 281822 240658 4096 32 10471 12309 402237 309364 4096 64 21273 18174 329073 266562 4096 128 17797 30580 354357 864491 4096 256 20978 35623 443239 602616 4096 512 28046 57599 1024269 720245 8192 4 1486 5047 223264 245555 8192 8 8346 8376 279582 273667 8192 16 9761 10058 144528 167153 8192 32 18632 16418 342676 450632 8192 64 14115 27208 551018 449347 8192 128 16400 30964 553887 350235 8192 256 38693 24855 505492 502638 8192 512 30026 27465 819439 436581 16384 4 4861 4764 244621 225036 16384 8 6563 6683 287469 256842 16384 16 9448 11469 553119 541832 16384 32 14626 17387 645824 593515 16384 64 19876 24750 491686 348151 16384 128 22697 31285 885288 739684 16384 256 25651 31656 401608 540847 16384 512 33363 39038 1027522 916738 32768 4 4343 4681 299508 250418 32768 8