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: Tue Sep 15 14:53:44 2026 Auto Mode Machine = Linux oleg242-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-oleg242-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 2297 9049 546928 524487 64 8 3194 9483 266620 811459 64 16 5247 29534 889431 889431 64 32 4356 46140 1124074 673098 64 64 2852 27910 1392258 132770 128 4 2552 2986 568836 334331 128 8 2785 8499 914904 242839 128 16 8562 46729 1015251 411772 128 32 3319 63778 1085013 870405 128 64 1850 31993 1243315 1093856 128 128 3459 61653 1561553 1455701 256 4 2798 3616 629094 575484 256 8 9133 18738 800221 385018 256 16 8788 35126 449112 859127 256 32 13692 41344 1180188 443730 256 64 13785 46860 1292410 917880 256 128 8275 64812 1422540 456366 256 256 11506 70253 1718521 668246 512 4 7650 6139 179783 304055 512 8 12202 19241 417245 332437 512 16 11574 16399 631277 542457 512 32 11799 34487 1182661 141274 512 64 17772 17170 279627 1041049 512 128 6552 23517 791318 655558 512 256 7210 32102 1017858 1533034 512 512 21934 74266 1620980 2032051 1024 4 8323 7765 353588 358188 1024 8 12981 20748 424705 691865 1024 16 8338 11244 881234 548190 1024 32 23404 21463 174480 558019 1024 64 25075 46907 1028043 148277 1024 128 29910 57280 1352828 659870 1024 256 31912 78388 491088 930894 1024 512 29384 76940 381374 95202 2048 4 5453 9191 208742 205207 2048 8 9214 15964 867511 327674 2048 16 20588 25081 828520 548603 2048 32 16317 34467 699916 987938 2048 64 29386 47369 1144133 1245675 2048 128 31154 42418 1647536 484518 2048 256 17412 76461 1023975 978931 2048 512 21305 37663 873777 118389 4096 4 4104 4534 202851 131590 4096 8 6794 9406 643421 502514 4096 16 11297 17828 807711 444972 4096 32 36779 48608 615946 1228554 4096 64 34857 73054 1218360 509519 4096 128 35222 50943 276997 483534 4096 256 33568 30399 1652894 473042 4096 512 47476 45716 1611951 507562 8192 4 5607 2056 280069 137383 8192 8 6693 7348 484132 572587 8192 16 10250 11603 341688 469775 8192 32 14254 18204 227789 223203 8192 64 15768 19604 769641 444614 8192 128 33454 37219 1061016 449659 8192 256 32020 41626 338961 279486 8192 512 30849 39914 449294 991542 16384 4 5427 5531 195863 219166 16384 8 9151 7874 453999 252792 16384 16 11567 12517 472406 452048 16384 32 12493 20562 305300 505897 16384 64 19261 31538 826811 1033565 16384 128 29427 33315 1236900 925492 16384 256 27449 40626 682608 841420 16384 512 33125 43070 519697 614028 32768 4 6623 7636 302941 205019 32768 8 9092 10609 357608 571469 32768 16 14067 10368 318138 163145 32768 32