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 Mar 2 12:52:02 2026 Auto Mode Machine = Linux oleg303-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-oleg303-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 3008 10559 651849 503814 64 8 8477 14719 780776 710511 64 16 6624 31069 1279447 877797 64 32 4019 81521 1363961 1083249 64 64 5544 55315 1049372 1734015 128 4 9024 13907 673778 584950 128 8 11871 13040 1057236 25038 128 16 8506 20430 1196221 848397 128 32 6993 36116 1504659 131560 128 64 25548 59396 1196221 1278855 128 128 11161 73354 1603529 1802755 256 4 6896 8871 682691 253971 256 8 14129 21379 924200 511840 256 16 16443 24318 750970 1036624 256 32 9766 36676 2205688 134810 256 64 19485 32866 124336 797250 256 128 23393 121963 1445521 1292410 256 256 18586 130676 1312954 876662 512 4 13430 14749 263501 530006 512 8 14621 19214 755144 692780 512 16 14893 18311 1132755 521385 512 32 19304 33719 668413 462440 512 64 11970 53222 1273861 613951 512 128 19452 78709 1514652 571472 512 256 28966 177348 1514652 2105777 512 512 37841 109004 1011625 2022482 1024 4 7866 9767 647241 436311 1024 8 14673 9596 1094034 681329 1024 16 26372 49049 1239598 572066 1024 32 14688 48884 337527 283256 1024 64 25739 64245 1920993 1852232 1024 128 32004 85956 1196434 1281771 1024 256 47962 135540 1402756 2260740 1024 512 21333 72424 1130312 1799462 2048 4 12507 11367 617456 322060 2048 8 11709 11996 438266 849831 2048 16 22497 24708 790765 525545 2048 32 36564 45118 952130 817559 2048 64 33561 67994 1502575 508466 2048 128 44335 54333 1310279 1383731 2048 256 36555 77611 1692329 1413560 2048 512 31585 51704 572211 1397008 4096 4 9656 6721 159701 128067 4096 8 12085 20901 197606 578041 4096 16 19292 28306 526750 417242 4096 32 35373 57918 1214742 946402 4096 64 31184 38518 1499926 1034071 4096 128 30020 43677 1208929 645548 4096 256 35676 44153 1039326 935630 4096 512 32415 68334 966040 795481 8192 4 7647 8907 376277 307299 8192 8 14610 15494 542449 335269 8192 16 20284 3189 704254 833978 8192 32 17775 35604 571274 679545 8192 64 20342 34987 1132273 974556 8192 128 38086 58961 901409 1122177 8192 256 32135 52126 834383 560254 8192 512 34414 52174 848036 905089 16384 4 8437 9873 487995 301981 16384 8 18350 17271 444902 917558 16384 16 20459 20317 1102407 702755 16384 32 32574 35726 599312 529626 16384 64 32729 48714 858469 1049315 16384 128 39135 64482 1162907 1183373 16384 256 57081 83341 992298 1023604 16384 512 42597 75019 1222422 845145 32768 4 8533 8184 226283 352275 32768 8 11396 17427 1100331 421323 32768 16 37782 28588 541539 642950 32768 32 36726 45994 412451 551955 32768 64 39585 71410 764412 611549 32768 128 48294 67790 626120 813807 32768 256 58128 85040 1214341 1214577 32768 512 66170 88214 1359949 1202095 65536 4