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: Sun Nov 16 20:58:00 2025 Auto Mode Machine = Linux oleg140-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-oleg140-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 1838 3548 272300 46580 64 8 2727 5292 76459 325058 64 16 3003 17376 621657 566551 64 32 3384 59259 780776 470274 64 64 2961 75747 1143223 1484662 128 4 3895 4860 257022 239695 128 8 2675 10916 444501 423798 128 16 5477 48337 55126 633247 128 32 1799 68558 934004 630273 128 64 4249 74155 1175271 297632 128 128 2672 20668 1561553 1663139 256 4 6701 17461 20419 253252 256 8 6279 13554 106661 385571 256 16 6106 37836 641497 590031 256 32 7525 48221 844929 454050 256 64 7889 57825 1053922 907792 256 128 4119 81265 260945 1128110 256 256 8231 113373 1437779 1430119 512 4 5962 6574 85052 47877 512 8 11860 20137 415550 291904 512 16 16907 45853 665926 529483 512 32 19242 71628 1094088 837942 512 64 33534 84740 1213400 1127995 512 128 6477 25119 1376763 1103647 512 256 19031 37317 1729323 1625889 512 512 11373 80454 1614885 2124526 1024 4 3913 6343 213565 79159 1024 8 6187 17446 173556 422450 1024 16 9722 44450 711581 459610 1024 32 38879 73111 1076755 875308 1024 64 38376 84881 1206178 977060 1024 128 38981 97898 74396 484879 1024 256 32109 118137 1535119 1174192 1024 512 22325 124637 198603 1347311 2048 4 6231 6879 274274 97066 2048 8 19432 18300 373381 313537 2048 16 29881 49183 336611 322217 2048 32 11798 54232 977038 813301 2048 64 32119 80884 710393 201751 2048 128 45777 41031 352989 1166982 2048 256 56285 111431 810156 1373553 2048 512 47038 82371 1651654 1487484 4096 4 5663 8103 126784 65089 4096 8 10486 10257 152104 140144 4096 16 15063 19776 275195 383489 4096 32 20785 35348 420150 562945 4096 64 25065 28932 305306 355618 4096 128 29989 86817 980652 828952 4096 256 65395 100154 1598751 1282385 4096 512 50514 61968 1602479 1417737 8192 4 11754 5998 223897 72939 8192 8 2608 11629 211275 291466 8192 16 27906 27415 673564 322191 8192 32 23115 61387 927017 670488 8192 64 40741 72006 1070303 931541 8192 128 34067 40192 446840 727932 8192 256 37655 61815 1518407 1129147 8192 512 55028 68624 621032 573189 16384 4 5557 7159 100850 184307 16384 8 12127 11411 379029 265117 16384 16 17940 19080 330383 493062 16384 32 25951 30245 471398 442119 16384 64 31092 40564 913120 585625 16384 128 39413 47591 855733 756490 16384 256 41827 59901 1298755 433956 16384 512 46898 63467 713866 563742 32768 4 7615 6822 136433 131318 32768 8 13221 20342 400807 272283 32768 16 22257 26353 499482 325965 32768 32 24304 39194 799827 608495 32768 64 29200 44466 1039064 889470 32768 128 35525 48122 1190392 1132547 32768 256 35897 50601 1180576 721078 32768 512 46888 59055 1125932 639064 65536 4