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 2 11:01:23 2026 Auto Mode Machine = Linux oleg309-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-oleg309-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 3466 5520 681644 343792 64 8 4815 19405 754443 447537 64 16 6363 43507 983980 877797 64 32 7339 46275 1310683 492717 64 64 9562 71339 1279447 323102 128 4 6728 12911 767171 535903 128 8 6224 18842 766076 740710 128 16 11180 35272 1000121 883293 128 32 11866 51180 1391557 919605 128 64 14533 92344 1040839 178789 128 128 12210 79409 1294270 1997245 256 4 6315 8613 435983 533190 256 8 11039 17506 864661 115632 256 16 11802 30776 342741 633548 256 32 15859 29196 1354356 1079348 256 64 12332 73034 1445521 1347557 256 128 18725 58406 1391207 1652404 256 256 16003 85077 1354356 2165650 512 4 9046 6410 384936 467575 512 8 17711 13075 867738 551088 512 16 23001 25801 236173 139358 512 32 24560 29292 1193838 537838 512 64 27831 69283 1122687 671759 512 128 20539 48256 2097550 699550 512 256 28995 136427 1700565 1645826 512 512 27277 150459 542868 509993 1024 4 9130 9781 184675 188683 1024 8 12572 14821 892033 547003 1024 16 28987 41609 694663 1021928 1024 32 33522 61801 558382 603750 1024 64 29193 41541 420382 1223356 1024 128 44423 64467 1542286 1851434 1024 256 55944 68394 1771262 1203137 1024 512 18884 51724 562919 1809317 2048 4 9671 9674 287810 465558 2048 8 13919 13927 937785 643209 2048 16 24913 36395 564206 617456 2048 32 23633 44842 843903 1049754 2048 64 46780 48354 573166 939426 2048 128 35326 53358 651206 1430271 2048 256 33805 52483 1252577 1255690 2048 512 62360 55046 1666393 851601 4096 4 8240 5952 244345 402557 4096 8 10069 13342 308104 271349 4096 16 19651 25729 419330 929857 4096 32 19867 37654 862105 911408 4096 64 33446 60067 1358972 925250 4096 128 47941 65898 933039 256015 4096 256 37156 61779 1241965 1069210 4096 512 29378 80313 1172943 719220 8192 4 8948 10993 389055 276530 8192 8 18379 20416 794264 732151 8192 16 24473 31541 489337 654835 8192 32 31053 29627 409782 550021 8192 64 3771 54298 601159 545766 8192 128 38034 98176 1037093 887348 8192 256 38246 63959 422307 780853 8192 512 47553 66316 1264396 1104928 16384 4 10474 10427 522066 405664 16384 8 18512 17555 381271 438310 16384 16 24305 26246 1128291 626563 16384 32 33104 39409 714742 764035 16384 64 42485 57968 935470 728664 16384 128 50026 63342 1078395 1227006 16384 256 66246 74050 1089664 910121 16384 512 55766 92211 1484484 914798 32768 4 9566 9970 652371 473025 32768 8 15908 17283 552552 764501 32768 16 23687 30525 605335 631282 32768 32 34071 39069 781587 674266 32768 64 42843 55263 683708 993208 32768 128 48136 68479 643872 783155 32768 256 44839 69887 1148177 1147305 32768 512 53674 81992 635186 1308944 65536 4 9681 10707 464083 428628 65536 8