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 Sep 4 22:25:20 2026 Auto Mode Machine = Linux oleg601-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-oleg601-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 1742 4643 653436 231050 64 8 2976 11745 666414 394870 64 16 1952 17274 866463 538156 64 32 8168 20415 1124074 889431 64 64 3629 38786 1143223 1452528 128 4 3958 6363 462100 529038 128 8 5866 12903 895074 677178 128 16 9836 34252 992724 811221 128 32 5266 72356 1102844 432330 128 64 3904 78194 1346196 1451764 128 128 7414 45025 1377278 1455701 256 4 6145 5429 624339 516270 256 8 9234 14843 609455 805021 256 16 8616 43198 670332 729540 256 32 9082 12775 1103757 369897 256 64 16806 69928 196483 540164 256 128 23497 68759 1327564 595264 256 256 5812 36686 1662639 2097948 512 4 5738 7688 54624 220507 512 8 4305 8476 384109 673655 512 16 8079 27731 167984 760762 512 32 7904 17358 682649 745445 512 64 8086 23092 1187895 591951 512 128 31683 22595 652174 1395552 512 256 15609 75438 1645826 1155924 512 512 12117 32747 1450212 711133 1024 4 10774 6770 170382 145435 1024 8 12859 15040 778665 306503 1024 16 12097 8763 481455 395674 1024 32 17165 23466 284759 344899 1024 64 15712 31713 320596 130048 1024 128 13743 50034 592588 675967 1024 256 13727 43674 488297 1033237 1024 512 37368 80031 1135391 310379 2048 4 6781 6952 341103 302688 2048 8 13084 17658 439387 451607 2048 16 22837 27048 1027036 368875 2048 32 14739 19524 935538 784053 2048 64 20537 42918 483700 339190 2048 128 27334 45431 724228 544673 2048 256 17794 65225 1378181 191364 2048 512 37863 54052 1480817 1357919 4096 4 6616 5883 255379 348717 4096 8 13467 12427 446917 347504 4096 16 1467 14172 247431 580993 4096 32 23317 18908 282499 406751 4096 64 18172 33389 534718 415536 4096 128 30420 30968 668742 825328 4096 256 26525 61932 496846 538169 4096 512 34695 66681 516784 575601 8192 4 6002 5606 110624 141468 8192 8 7645 9981 336385 275592 8192 16 15100 18001 356326 427488 8192 32 22434 24225 318358 365191 8192 64 24326 30929 270362 442404 8192 128 32007 27071 786105 727085 8192 256 32498 41299 1163797 671248 8192 512 26000 44702 474046 398499 16384 4 4745 5961 243349 205478 16384 8 8712 11578 550836 482479 16384 16 14078 14919 566115 442666 16384 32 19356 20373 267009 425471 16384 64 24205 24563 340575 302555 16384 128 25665 39679 399258 782763 16384 256 29216 63294 822900 1272540 16384 512 28101 37657 452811 539514 32768 4 5935 5355 268007 132012 32768 8