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 21 22:44:14 2026 Auto Mode Machine = Linux oleg340-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-oleg340-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 1372 6517 240575 532815 64 8 3502 19956 703068 735831 64 16 3668 19541 1101022 577521 64 32 3634 14548 1204796 877797 64 64 1943 53284 1304314 3022727 128 4 5328 7444 601330 524900 128 8 3729 7792 940549 800337 128 16 4375 30556 1123617 1024942 128 32 8402 36952 1291158 438331 128 64 8228 45750 1363288 1306873 128 128 9824 61484 1663139 1254941 256 4 4712 4624 603630 254996 256 8 8657 7288 661657 72355 256 16 9004 14792 406442 361066 256 32 12647 40227 1118707 592309 256 64 13043 49826 948698 1132871 256 128 13603 59603 1231629 1327564 256 256 7787 29364 1471270 2015259 512 4 4732 3985 293580 462938 512 8 5222 10338 94205 103434 512 16 9404 13048 71979 769761 512 32 4672 21979 613075 941133 512 64 12486 22104 973118 1117430 512 128 15051 41905 465044 896725 512 256 24333 77869 756207 1380303 512 512 10103 38455 1589779 1005938 1024 4 6132 5707 293576 134155 1024 8 6790 7887 511256 289441 1024 16 17979 18526 160825 315370 1024 32 8685 22230 815943 160476 1024 64 11606 47289 718125 638770 1024 128 21580 21498 314216 378417 1024 256 21156 29432 649688 433187 1024 512 13853 31210 1605111 687656 2048 4 7903 5359 277320 312533 2048 8 15497 10557 606813 222659 2048 16 12926 27595 199358 855161 2048 32 15938 20169 305530 268487 2048 64 23038 19802 1174321 647475 2048 128 14618 27239 232098 171480 2048 256 42056 33992 1318727 1257344 2048 512 30725 52985 191851 297026 4096 4 4058 6313 176544 180013 4096 8 11366 8397 477725 509957 4096 16 12974 18543 434407 443433 4096 32 19542 23837 568346 577303 4096 64 18683 35250 865405 323435 4096 128 23045 39529 809958 750317 4096 256 28273 29053 397398 462299 4096 512 25779 26848 940084 453847 8192 4 1945 5663 367041 246139 8192 8 11521 12064 362590 263926 8192 16 14141 19742 798046 326753 8192 32 25846 25505 734373 359329 8192 64 27364 27470 700278 606678 8192 128 20096 32016 748271 751479 8192 256 33613 34707 540232 356547 8192 512 26877 39071 841597 637119 16384 4 6463 6127 196757 250458 16384 8 9067 10301 424763 427613 16384 16 13161 21396 488346 526070 16384 32 18411 22311 583165 599506 16384 64 19391 28755 595155 768512 16384 128 26031 33091 531379 489250 16384 256 26056 48038 737422 433657 16384 512 30046 53472 671286 608665 32768 4 6154 7098 494015 344679 32768 8 9194 11092 414989 454555 32768 16 13800 14338 397969 188909 32768 32 15170 22507 783964 382625 32768 64