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 Apr 10 20:19:51 2026 Auto Mode Machine = Linux oleg249-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-oleg249-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 3220 14269 640954 586352 64 8 4027 26981 218452 587635 64 16 5278 45522 145824 1363961 64 32 5852 67858 2052169 1029254 64 64 3812 96220 1249666 1562436 128 4 4613 7807 688467 601330 128 8 9231 22759 1065630 767171 128 16 11705 24436 948860 795593 128 32 7683 18938 1220700 1007629 128 64 10469 83019 1526043 1294270 128 128 14988 78630 1598754 2784517 256 4 6328 10265 809878 536654 256 8 10286 17834 842278 668246 256 16 13622 36565 1132871 1340826 256 32 13264 49729 386126 1052888 256 64 11940 41184 859127 750970 256 128 13864 27147 1662639 870974 256 256 17462 138837 1985448 2187712 512 4 4364 8880 617482 225841 512 8 9293 11219 567096 610287 512 16 12393 23516 909640 624485 512 32 12286 17130 643960 1030064 512 64 16135 55119 336606 1242896 512 128 51427 73880 1480200 1351633 512 256 23700 80064 1889050 1624659 512 512 35092 183251 2722449 2613128 1024 4 10133 17682 800582 783494 1024 8 20556 15051 955327 636498 1024 16 32989 25930 752472 712053 1024 32 32190 48427 746456 891848 1024 64 33789 115996 1400926 1170352 1024 128 32754 71333 1628234 911146 1024 256 37466 122619 841357 935966 1024 512 39331 86442 1668074 1146607 2048 4 8275 10545 634420 436019 2048 8 18443 14288 521113 641384 2048 16 16648 27900 1027036 605018 2048 32 16008 36856 890351 376193 2048 64 29207 60843 175599 704739 2048 128 34567 44491 1720807 509461 2048 256 40732 62152 798780 878962 2048 512 54744 88150 781058 2027934 4096 4 8753 7999 846473 861586 4096 8 12308 15938 569590 294656 4096 16 16700 16403 828312 455363 4096 32 35015 46323 1565819 849445 4096 64 52003 68182 2208264 799703 4096 128 48878 115477 1097207 625431 4096 256 70330 116506 1308961 961713 4096 512 43990 45594 1318707 573105 8192 4 10102 9691 597126 345102 8192 8 13777 16625 975358 410051 8192 16 24870 30210 558378 562326 8192 32 33521 46982 916753 693060 8192 64 38198 51688 708831 590578 8192 128 43438 44719 763400 783095 8192 256 35759 60046 1263420 485335 8192 512 41690 44300 701078 785045 16384 4 7907 6374 310993 346223 16384 8 5666 13182 480862 605469 16384 16 20184 29159 983620 766575 16384 32 35968 40258 1350252 1049251 16384 64 36071 36171 1327199 1003866 16384 128 41541 69964 603041 737453 16384 256 43809 58515 1240271 773451 16384 512 47382 54549 1695905 962177 32768 4 8621 10456 543245 590701 32768 8 15238 17742 569244 682411 32768 16 26806 24365 781716 750889 32768 32 32291 31785 632526 954862 32768 64 34890 40381 1095953 1052173 32768 128 40165 62367 956757 717982 32768 256 52280 45548 1152945 764876 32768 512 51761 77627 2137636 1354321 65536 4 7915 9285 378674 372010 65536 8 13649 14450 606623 588849 65536 16