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 04:37:57 2026 Auto Mode Machine = Linux oleg648-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-oleg648-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 2955 10767 718114 555990 64 8 3747 14807 929467 727850 64 16 7340 27959 1087638 874936 64 32 5142 62371 1255511 1070292 64 64 3418 83996 1734015 1638743 128 4 2962 13120 535368 581781 128 8 9130 17386 584313 27808 128 16 5295 26771 990891 864797 128 32 10080 34612 1349580 1243315 128 64 8483 79798 1471662 1508887 128 128 16944 117869 1332828 2004703 256 4 5614 3486 113373 252241 256 8 7957 21787 532397 362040 256 16 5094 25736 1180188 1070737 256 32 13669 39987 644965 1112909 256 64 12158 103815 507006 1391207 256 128 23192 129167 1461259 1607865 256 256 29990 139577 1632308 1718521 512 4 6805 5053 260433 567695 512 8 8540 8155 757541 594738 512 16 4498 16364 872320 583110 512 32 19088 23263 924123 1227971 512 64 12227 34813 916237 1137555 512 128 16540 92905 1689859 885631 512 256 30576 50239 1163439 1712772 512 512 37288 103374 1679288 1036527 1024 4 8421 5152 298618 283256 1024 8 15535 20818 264390 355932 1024 16 12030 25437 1157109 1018777 1024 32 18646 36751 999107 205906 1024 64 23195 73457 921705 244048 1024 128 59427 99168 816563 535011 1024 256 21712 39680 1851434 1594978 1024 512 31805 52697 815943 957030 2048 4 5083 4654 521778 134807 2048 8 5522 11433 316728 183464 2048 16 7675 15341 378414 993767 2048 32 20242 40296 360697 868213 2048 64 21302 32351 1612586 420811 2048 128 25064 62963 1651337 991702 2048 256 18494 67134 543811 262634 2048 512 23208 74245 962802 558956 4096 4 5427 6248 256160 360249 4096 8 14666 14037 662655 536890 4096 16 30469 37251 603060 788761 4096 32 23747 48484 930663 1272035 4096 64 32207 60020 806649 550164 4096 128 48507 70842 1615134 1138734 4096 256 53437 81001 1596374 1061940 4096 512 48876 60176 605291 830153 8192 4 2553 10331 606100 595481 8192 8 10952 15141 513446 562980 8192 16 15156 22503 631510 555391 8192 32 23217 27563 778200 534583 8192 64 24386 33175 1043835 483185 8192 128 24850 82262 1402964 519533 8192 256 37452 87594 738493 1439705 8192 512 35442 86390 1269488 1671453 16384 4 6866 6195 412767 250857 16384 8 12571 10381 584181 448678 16384 16 17692 16069 816457 515301 16384 32 23615 33951 1122192 998107 16384 64 25610 37255 788530 369475 16384 128 30759 54739 982074 1015361 16384 256 46381 62563 1086683 714987 16384 512 34791 75175 1393909 1092123 32768 4 5643 6188 413351 201959 32768 8 11621 13365 700094 615871 32768 16 18683 21250 443878 462362 32768 32 21986 31239 447197 747447 32768 64 28947 38897 908460 527963 32768 128 32628 47365 500588 531009 32768 256