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 Aug 10 05:07:28 2026 Auto Mode Machine = Linux oleg213-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-oleg213-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 2803 8632 181890 582535 64 8 4359 12986 852702 752329 64 16 5740 30844 1124074 760859 64 32 6041 78517 1947927 470274 64 64 4008 66745 1310683 1363961 128 4 4836 12337 692017 554157 128 8 6268 20440 902598 841746 128 16 9409 34224 1185654 826202 128 32 13499 47423 345965 1185654 128 64 10453 56609 1406136 1377278 128 128 13135 65005 1440082 3124872 256 4 6746 11252 520272 457143 256 8 12142 14055 619655 573946 256 16 13225 27488 868157 1071806 256 32 16233 64762 425277 1447470 256 64 12338 53014 1924938 1523457 256 128 16559 60262 737558 1514860 256 256 8297 40934 1514860 1755037 512 4 8458 7213 724325 517240 512 8 11146 17842 859060 785241 512 16 14560 35148 791318 912345 512 32 15671 19329 1372364 1230786 512 64 23393 57985 1467055 1267845 512 128 25158 125153 1442420 1222379 512 256 28596 78720 1667552 1645826 512 512 28694 70816 2894940 2081286 1024 4 7769 8777 295271 274758 1024 8 8752 18489 1450607 606650 1024 16 13971 24095 1144163 948157 1024 32 27007 32817 1376236 586839 1024 64 29521 82367 1199106 183806 1024 128 27274 114325 1416169 1166221 1024 256 41629 82996 1831694 284664 1024 512 20172 64216 1777861 1888889 2048 4 9256 9712 452893 272050 2048 8 14224 16958 462301 702089 2048 16 23239 42153 1160362 570009 2048 32 22696 38160 613531 684467 2048 64 35997 65676 1448358 898640 2048 128 45222 80484 973826 581508 2048 256 84162 85130 1366125 498290 2048 512 33237 67072 1424106 922576 4096 4 12581 7426 590134 763760 4096 8 20931 17201 334943 250721 4096 16 18672 26474 1347355 835401 4096 32 31645 63856 671487 447208 4096 64 32754 51382 565763 494743 4096 128 51350 65298 2228314 827315 4096 256 27338 85434 612062 1179061 4096 512 52535 70381 807597 932431 8192 4 9091 8014 400193 337980 8192 8 15889 14135 757743 694658 8192 16 26697 33801 578001 481432 8192 32 29714 43516 532570 507748 8192 64 44360 47929 1103296 1038409 8192 128 45267 51595 1314510 932806 8192 256 43336 38775 1605985 1269066 8192 512 37483 86455 2252387 1654232 16384 4 10306 13653 400842 551260 16384 8 15147 4951 766070 662625 16384 16 24237 22577 1058251 547278 16384 32 32691 28451 855424 767465 16384 64 26177 37088 769890 919412 16384 128 36341 64440 746554 900709 16384 256 42036 60563 1129310 540350 16384 512 47287 55060 1067009 840936 32768 4 8010 9978 527493 359918 32768 8 13806 18767 691437 567233 32768 16 24833 34393 783325 688793 32768 32 41855 49802 1290036 702934 32768 64 57538 73992 1624020 1358081 32768 128 53677 78968 1731845 1520766 32768 256 47014 76385 1073340 898612 32768 512 44987 71549 739934 575422 65536 4 9661 12264 711960 497691 65536 8 19823 20196 856702 701663 65536 16 26241 33173 744904 629645 65536 32 34249 38811 1110533 714263 65536 64