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 Jul 13 09:03:36 2026 Auto Mode Machine = Linux oleg254-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-oleg254-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 1756 2715 718114 520419 64 8 2837 26250 627470 771797 64 16 4840 24251 901377 621657 64 32 3497 11013 1013707 423529 64 64 1952 21362 1452528 1452528 128 4 2215 8440 566435 522346 128 8 4143 6966 542400 606767 128 16 3352 8721 579270 558771 128 32 4090 12084 1074159 673778 128 64 6394 33083 551878 670413 128 128 7178 38027 1359835 1622919 256 4 5209 6104 73772 438296 256 8 4312 9973 748875 682691 256 16 6845 27523 928195 705107 256 32 8867 23634 404452 773140 256 64 12730 32816 996229 996229 256 128 11079 48038 1286217 1213534 256 256 9254 56114 1422540 1506359 512 4 5395 7917 240377 464943 512 8 8120 9427 39533 646480 512 16 14079 19247 509509 713021 512 32 16174 34555 610982 270198 512 64 15613 35385 1302447 1001715 512 128 9972 40191 978885 788992 512 256 14948 60959 759685 1350783 512 512 23138 28934 1350783 554789 1024 4 4668 9498 415582 168114 1024 8 12453 12908 739898 517977 1024 16 15259 27476 359417 910181 1024 32 19450 20354 1016847 377851 1024 64 21003 38393 1155553 755118 1024 128 18375 30710 681329 326842 1024 256 32066 57512 690975 699528 1024 512 30538 40649 870694 875129 2048 4 5031 3833 387233 318360 2048 8 5907 9599 206763 475296 2048 16 9648 7058 327462 166436 2048 32 15764 17895 1297023 181272 2048 64 9664 16807 305356 1058942 2048 128 22693 24877 1308682 339633 2048 256 27922 28518 1153815 1016824 2048 512 22996 38531 1401796 1351722 4096 4 3590 4146 257076 157158 4096 8 5777 5697 415285 194232 4096 16 8452 6863 412900 414574 4096 32 21150 14252 315824 228252 4096 64 26786 39367 647178 506619 4096 128 30106 32839 453548 501107 4096 256 36035 62120 894887 774153 4096 512 38437 73299 191117 206974 8192 4 5586 6636 209295 332129 8192 8 5625 8023 240552 178607 8192 16 19399 12933 346855 413067 8192 32 13427 14864 471076 311317 8192 64 31831 23155 525701 550647 8192 128 22795 31996 363522 568852 8192 256 26498 25068 461987 362559 8192 512 19716 21935 1182950 832603 16384 4 4299 4744 218261 273518 16384 8 9715 13002 284879 356203 16384 16 14956 13782 505120 692270 16384 32 21534 24152 518399 437958 16384 64 22963 25437 509864 607965 16384 128 30104 41007 729345 670350 16384 256 26937 41626 877376 804594 16384 512 35419 47307 906448 1334752 32768 4 5721 5593 311950 345431 32768 8 7351 8638 472815 433255 32768 16