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 Aug 19 06:40:05 2026 Auto Mode Machine = Linux oleg254-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-oleg254-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 1935 7529 257911 592827 64 8 2027 9418 852702 778512 64 16 1461 37649 653436 681644 64 32 2309 13637 1336792 1087638 64 64 3135 76568 1255511 1991276 128 4 1651 11461 463696 417212 128 8 4623 11566 627328 691126 128 16 8736 17204 1165070 969421 128 32 8216 18351 1306873 311264 128 64 9585 26716 1048974 1133103 128 128 7056 38244 1603529 1802755 256 4 4440 7043 600928 547044 256 8 6391 11839 482839 768712 256 16 7910 28548 344500 477472 256 32 11065 29808 1254656 984356 256 64 12941 65174 1455317 175338 256 128 12432 41290 1185399 1347557 256 256 16362 69887 1579483 996229 512 4 8151 10566 382127 467983 512 8 11321 19143 464641 348289 512 16 14837 32766 1135150 870905 512 32 19865 48720 1323315 1110496 512 64 21371 40725 873740 1789859 512 128 20969 38808 738777 924123 512 256 27300 87031 1842059 1501940 512 512 26442 81267 1032044 1105920 1024 4 5556 4736 180477 418824 1024 8 6497 10792 237083 313918 1024 16 18808 30725 956178 686337 1024 32 17092 16803 1186518 570168 1024 64 6497 36687 666216 596042 1024 128 13586 29041 803728 572677 1024 256 16251 27392 595629 255670 1024 512 10905 25381 630148 1630088 2048 4 4266 6094 94955 193132 2048 8 4858 8195 190672 863066 2048 16 7614 14638 1138372 943347 2048 32 18786 35635 557903 750749 2048 64 14922 29949 1449336 606813 2048 128 34148 53264 1568134 608791 2048 256 40286 60887 437685 1894641 2048 512 33902 70516 1763917 1407538 4096 4 5219 7448 359270 499330 4096 8 13062 15953 530917 299897 4096 16 18067 21478 428673 341909 4096 32 11870 23789 1321243 662450 4096 64 17152 38873 848019 528647 4096 128 31842 22780 1002454 322065 4096 256 22338 41775 1678573 958815 4096 512 38273 36825 1766239 244275 8192 4 4522 1537 180384 388303 8192 8 4977 5649 251574 307000 8192 16 11744 13695 401470 691763 8192 32 20842 26426 587659 721255 8192 64 29343 21656 720106 683397 8192 128 16011 26304 1020036 373009 8192 256 18909 37926 261531 446086 8192 512 27161 40402 920955 393240 16384 4 5538 4669 158154 197195 16384 8 6003 7390 385061 540852 16384 16 13417 12172 536758 479373 16384 32 14197 17212 934363 780266 16384 64 20390 28834 843703 420372 16384 128 23933 30429 661420 579222 16384 256 25284 55747 348026 268885 16384 512 29313 46581 636864 343386 32768 4 4296 4147 283833 181957 32768 8 7354 15269 520953 245008