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: Wed Sep 30 08:41:45 2026 Auto Mode Machine = Linux oleg155-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-oleg155-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 4872 13250 435909 592827 64 8 5167 30798 712397 688639 64 16 7130 33757 1066042 829001 64 32 6970 32487 1330167 1168097 64 64 8938 68307 1204796 1892980 128 4 5472 12955 505620 667081 128 8 9967 18518 1007629 314547 128 16 8104 33833 969421 592046 128 32 10206 78149 1231904 1142750 128 64 6842 103069 1206978 1391557 128 128 8655 69562 1471662 1997245 256 4 6309 12125 716876 1031644 256 8 6549 20909 917880 267779 256 16 20061 27541 2081678 988889 256 32 15953 70814 1230218 1084800 256 64 12340 39931 1093639 1066483 256 128 36389 77932 1479379 114534 256 256 18827 91821 1694118 1649865 512 4 8642 6267 507462 639930 512 8 9517 18125 573456 906185 512 16 7265 40410 996139 533960 512 32 25643 63586 842214 975328 512 64 33775 57767 920953 1201856 512 128 36054 92989 1182661 1476130 512 256 42663 85137 1741948 1667552 512 512 32032 77844 99902 281312 1024 4 7802 7342 634429 649001 1024 8 15823 23395 338618 617998 1024 16 20570 14283 890369 799390 1024 32 44095 39759 867003 1035479 1024 64 47566 37256 485537 1048113 1024 128 31601 36104 291741 585479 1024 256 45295 96421 1061322 769320 1024 512 24441 27295 1273788 2638501 2048 4 10752 7284 202593 139196 2048 8 15137 15709 509582 490774 2048 16 24929 12720 425416 271362 2048 32 21799 34903 1084751 1198237 2048 64 16800 60807 1477506 996072 2048 128 29023 58160 874043 1310279 2048 256 40712 68574 1504681 1192085 2048 512 45697 37867 755703 365004 4096 4 7459 8329 449713 390986 4096 8 15454 12492 466352 549864 4096 16 19459 19292 792399 554496 4096 32 24142 24082 763590 1231813 4096 64 28412 57516 550693 850328 4096 128 33711 63473 334858 371281 4096 256 27827 55932 1016632 371956 4096 512 38663 56300 1692630 1504787 8192 4 7035 9286 351075 291882 8192 8 12223 19636 255774 295570 8192 16 15138 21909 603291 550056 8192 32 25318 40270 821162 755311 8192 64 31316 47324 527258 1063182 8192 128 27782 51743 974196 527736 8192 256 40085 56959 767338 715458 8192 512 41917 60559 1103012 826316 16384 4 7852 7047 301375 389019 16384 8 14053 17068 332798 206965 16384 16 20766 22464 607917 499052 16384 32 29264 34188 369059 262022 16384 64 24932 33472 1405024 611803 16384 128 29746 42507 953221 1232419 16384 256 31855 36824 781526 817604 16384 512 27255 51358 870794 811655 32768 4 6583 8058 257620 249179 32768 8 12998 13969 779911 777045 32768 16 20185 20182 225785 323948 32768 32 17418 35041 678734 545088 32768 64 21921 24719 585372 425447 32768 128 25801 41721 932872 424968 32768 256 29141 38720 1253412 246353 32768 512 26411 50256 1320921 534647 65536 4