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 Aug 28 01:05:55 2026 Auto Mode Machine = Linux oleg621-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-oleg621-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 2205 5714 633392 336467 64 8 2147 19777 780776 503814 64 16 3179 26069 983980 863676 64 32 5138 35414 1188789 1066042 64 64 4363 7447 763021 1492919 128 4 4089 6614 287126 538051 128 8 6387 21779 826202 246180 128 16 7702 15496 1048974 992724 128 32 4173 30717 1065630 831319 128 64 6202 42257 1421023 1278855 128 128 9246 58230 1539168 1085013 256 4 3026 4596 556398 162250 256 8 4386 15817 401277 217850 256 16 11215 33216 962301 886067 256 32 15082 42901 1195962 807442 256 64 16024 63762 1195962 1208072 256 128 13348 67067 1471270 1398455 256 256 18279 83658 322851 2114473 512 4 2727 4441 531712 271771 512 8 7632 11461 581059 266245 512 16 14543 29854 944444 741072 512 32 8218 19554 1098566 960926 512 64 16238 50414 1299295 1207261 512 128 6757 26994 61693 599553 512 256 20770 53062 1190529 1410215 512 512 23809 84434 234241 80097 1024 4 4274 3070 85433 191331 1024 8 4826 6601 88912 695225 1024 16 7567 18774 875129 397542 1024 32 8741 11638 1082454 122868 1024 64 15606 59208 677674 1072185 1024 128 16180 56322 779230 598451 1024 256 32816 27977 1251518 455902 1024 512 29959 65409 577528 1365299 2048 4 6369 4310 145412 161922 2048 8 9805 12141 781983 313149 2048 16 20784 16638 133960 339754 2048 32 11385 20442 851938 1169684 2048 64 40568 27105 892757 562028 2048 128 33034 48935 913938 732192 2048 256 38020 48801 1480817 250678 2048 512 14198 74681 1844994 1047577 4096 4 4308 5219 120591 180440 4096 8 11449 7226 217445 241067 4096 16 9678 13046 297673 282792 4096 32 19099 20862 406760 876890 4096 64 41469 45113 424815 462610 4096 128 26489 59607 514062 789377 4096 256 34986 51077 484898 1120026 4096 512 27271 28802 787388 393728 8192 4 8694 2120 226097 124771 8192 8 9249 19527 960257 603016 8192 16 20593 24419 571949 532884 8192 32 38366 32757 252792 556930 8192 64 25560 58229 1075799 759435 8192 128 42574 51918 892673 697379 8192 256 23169 78212 793714 547925 8192 512 28585 78512 551841 554414 16384 4 5940 5292 165839 116565 16384 8 9161 8720 283259 180190 16384 16 11859 15608 696536 577082 16384 32 16297 28630 483518 753843 16384 64 28772 35338 743847 561324 16384 128 26256 32338 416840 250941 16384 256 36682 54309 580318 740018 16384 512 39178 48941 792001 726530 32768 4 6198 6195 211215 206287 32768 8 10533 10400 458922 272472 32768 16 16518 18011 383417 670169 32768 32 19642 21358 473690 526316 32768 64 24041 25008 422056 358120 32768 128