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 Sep 7 23:49:27 2026 Auto Mode Machine = Linux oleg659-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-oleg659-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 4543 8604 565358 39332 64 8 4056 13855 821391 615952 64 16 5347 30161 998622 969761 64 32 2282 36929 1119387 1143223 64 64 5553 87529 645579 1421755 128 4 3146 7810 581781 325611 128 8 5328 15777 1000121 429563 128 16 10242 37494 1123617 367768 128 32 9676 59779 1278855 1048974 128 64 11761 56165 140218 1243315 128 128 11474 92423 1539168 1939522 256 4 4725 9622 235324 523315 256 8 5397 16470 785010 309542 256 16 7432 15604 568777 876662 256 32 10258 58012 1237306 120013 256 64 22574 66825 1243036 128517 256 128 20790 48929 1504249 1591186 256 256 24208 86894 1175022 2114473 512 4 6563 5218 319195 439085 512 8 9988 16590 777002 337983 512 16 19288 40458 1132755 151660 512 32 17660 20774 866338 132676 512 64 21907 62838 627404 725058 512 128 37317 95525 1506154 1289156 512 256 36742 92203 672811 1413929 512 512 19085 114717 1450212 917412 1024 4 8006 8771 410577 358188 1024 8 11243 12256 338831 725157 1024 16 15864 29303 250000 856286 1024 32 26695 43391 1245710 478718 1024 64 20938 40707 365721 393391 1024 128 21306 78197 1444266 1207534 1024 256 21333 34408 178712 737738 1024 512 55246 116046 524044 225152 2048 4 11130 7480 205560 216902 2048 8 14492 10739 247849 173177 2048 16 10753 23957 1206145 324260 2048 32 22279 38042 357039 800343 2048 64 20575 28557 1168252 839040 2048 128 26910 41230 633859 747158 2048 256 40558 56568 933911 699688 2048 512 30214 42559 1149338 517565 4096 4 7874 6955 319846 259648 4096 8 10859 15497 399329 319549 4096 16 19043 20225 333526 391324 4096 32 20924 34465 640399 454604 4096 64 28958 29625 545915 810263 4096 128 35361 46294 815920 682423 4096 256 38080 44137 586387 600237 4096 512 40014 52252 659678 646058 8192 4 2480 6859 271402 370260 8192 8 12728 10029 327064 447457 8192 16 11924 18831 815858 607622 8192 32 28872 23118 694700 388097 8192 64 34964 42450 953541 589524 8192 128 23002 47420 1195586 721694 8192 256 35186 54474 754051 353165 8192 512 32529 54414 635822 498206 16384 4 7618 10126 442381 321615 16384 8 10729 13712 693647 552394 16384 16 18214 20846 534795 345275 16384 32 22801 21360 383099 554543 16384 64 25173 29989 788304 818256 16384 128 25173 39917 644026 768409 16384 256 30452 45390 819974 522566 16384 512 31247 50325 807013 531687 32768 4 6686 7084 276932 167712 32768 8 9896 9914 354462 299311 32768 16 17650 15346 752184 457808 32768 32 22163 23196 829400 369424 32768 64 22506 28771 474582 308028 32768 128