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: Thu Sep 3 11:24:42 2026 Auto Mode Machine = Linux oleg313-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-oleg313-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 3193 14635 496362 235303 64 8 1984 17467 507625 645579 64 16 3406 25020 1163036 983980 64 32 2578 42495 1310683 1204796 64 64 6368 34314 1143223 2067979 128 4 3012 8733 455436 581781 128 8 2775 11088 718889 727658 128 16 2258 21444 889145 481150 128 32 3129 6424 122466 913347 128 64 5061 57036 1319723 2166499 128 128 4857 33596 1579934 1543594 256 4 4547 3187 125308 126668 256 8 2964 6378 790209 403085 256 16 4675 9779 356510 831194 256 32 7974 22886 1019886 514292 256 64 12581 64016 1752173 1312954 256 128 4169 14473 170089 1619994 256 256 6698 69584 395076 1718521 512 4 4775 6161 376170 273780 512 8 4851 8263 806474 594573 512 16 10278 30263 512549 274095 512 32 5298 13040 568146 686358 512 64 22971 58420 1323315 853257 512 128 20361 71902 1455126 1084694 512 256 25739 76784 724081 1520013 512 512 24316 80885 1450212 1373241 1024 4 3565 5434 207578 255109 1024 8 9225 4790 785213 347101 1024 16 8813 12261 192376 392779 1024 32 18677 15237 782923 537286 1024 64 12675 45299 1291406 810095 1024 128 11272 18541 348764 337076 1024 256 33535 48312 1301187 1311117 1024 512 33530 69025 780504 759659 2048 4 7813 3332 188965 200059 2048 8 6056 7199 830843 257578 2048 16 7158 12194 1088738 119124 2048 32 19615 12498 232255 356357 2048 64 17386 24541 829800 708459 2048 128 20510 38281 728034 295229 2048 256 36874 59496 348295 548463 2048 512 36396 49322 920895 230109 4096 4 4952 5705 178856 95956 4096 8 6623 8428 330752 233883 4096 16 12026 9084 293678 266334 4096 32 17581 16567 532563 255315 4096 64 11543 14796 361295 445457 4096 128 30784 23712 396253 456173 4096 256 22042 35194 1006388 659602 4096 512 31474 34495 309765 397316 8192 4 3736 12158 150717 144795 8192 8 9583 8533 180408 394206 8192 16 15110 11390 416578 270496 8192 32 17471 16918 521749 274456 8192 64 27770 32536 639741 540113 8192 128 34116 46587 712402 606229 8192 256 23571 35304 745883 410129 8192 512 31490 88043 1154142 1439223 16384 4 6221 6773 241083 213530 16384 8 10194 9284 557467 431352 16384 16 15731 15551 361973 277421 16384 32 18331 26554 737825 423064 16384 64 24569 27360 512354 561251 16384 128 17655 29945 436813 523669 16384 256 27678 36850 1174816 444844 16384 512 73631 33666 797618 581364 32768 4 9278 8835 227768 397530 32768 8 8538 7878 220712 213258 32768 16 11870 21555 375117 746578 32768 32