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 8 00:41:47 2026 Auto Mode Machine = Linux oleg637-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-oleg637-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 4679 18407 679917 222989 64 8 4120 29466 955947 712397 64 16 4842 42637 1143223 874936 64 32 8323 49850 1304314 1049372 64 64 5067 86962 1562436 1734015 128 4 5880 11572 677178 415597 128 8 9725 9144 681476 831319 128 16 3335 36260 753179 921183 128 32 8443 69680 927549 739689 128 64 5140 30984 1598754 1306873 128 128 13228 87015 1409828 1543594 256 4 8557 15174 705107 282503 256 8 7044 26747 883152 770920 256 16 13517 36797 977189 757326 256 32 21494 24240 1122215 894929 256 64 15212 29398 901693 569985 256 128 10139 64711 1561112 1280084 256 256 17520 86901 1591186 1996523 512 4 11160 12508 571929 499437 512 8 11190 12702 805264 447131 512 16 10980 21998 1132755 819398 512 32 20139 49946 143024 433152 512 64 18809 44065 1391933 767559 512 128 25251 62761 1171691 633699 512 256 12046 99416 1463057 1451192 512 512 10775 74310 1619757 1882427 1024 4 8121 13892 243757 397542 1024 8 17470 16445 567606 374393 1024 16 20549 47069 895941 930088 1024 32 17857 17668 878171 1087111 1024 64 16383 29328 571078 760735 1024 128 62435 108797 895754 803728 1024 256 37744 64031 1034481 968686 1024 512 35322 94832 1350701 612446 2048 4 8760 7262 406589 549059 2048 8 11985 14206 380172 217017 2048 16 14034 8168 462724 914717 2048 32 8400 60711 159739 344495 2048 64 16708 35718 831165 237338 2048 128 52944 41311 966050 628065 2048 256 31968 51398 1235996 929263 2048 512 40074 66597 346482 339579 4096 4 6494 6165 383952 261972 4096 8 5490 9991 182222 593620 4096 16 10649 12942 612805 598313 4096 32 12409 17472 364406 419064 4096 64 41743 45459 1068080 804421 4096 128 33640 40504 424762 640208 4096 256 35646 54689 504314 807749 4096 512 35113 61217 765597 525333 8192 4 5616 5533 191013 162969 8192 8 7805 10523 340891 310243 8192 16 9927 18308 320099 318311 8192 32 22971 28398 686442 536797 8192 64 27217 33766 434703 363476 8192 128 25220 46293 1004030 838905 8192 256 29946 48419 717579 772531 8192 512 26267 42885 351197 217017 16384 4 5701 6840 225612 162933 16384 8 9531 12063 441676 435708 16384 16 14622 14333 764213 580725 16384 32 21944 26561 387366 443086 16384 64 24825 30742 493182 694916 16384 128 24876 49506 467604 555579 16384 256 30914 57781 1091759 603661 16384 512 37448 56308 571710 601226 32768 4 6392 7006 236394 368801 32768 8 9960 11574 466766 453097 32768 16 14166 25708 298893 321012 32768 32