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 Jun 16 11:11:03 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 4 923 5501 453587 528618 64 8 2942 6100 811459 438043 64 16 4549 16293 942521 275656 64 32 3007 9127 1226821 718114 64 64 1991 56101 1017549 1518251 128 4 3341 4510 245729 288360 128 8 5909 2942 831319 1065630 128 16 6427 11597 914904 474349 128 32 6655 33048 669577 969421 128 64 7744 36654 1206978 859260 128 128 7579 64880 1471662 1911894 256 4 2794 3667 125425 522551 256 8 5505 6248 502969 958864 256 16 5543 13269 944525 731528 256 32 8605 23342 729540 966633 256 64 12071 15416 1157291 370025 256 128 10972 28883 1455317 1354356 256 256 12282 63524 1619994 150409 512 4 5141 7887 198147 482601 512 8 7832 14375 780390 416921 512 16 11217 17278 901241 680918 512 32 12482 14743 1130370 422749 512 64 16453 41582 621413 1143004 512 128 17728 57593 648041 736750 512 256 24688 57219 1036527 66021 512 512 9994 17981 1283761 941133 1024 4 2302 5390 298888 528104 1024 8 8342 8555 336733 508231 1024 16 8934 9474 131012 813933 1024 32 17477 36795 858340 702388 1024 64 23014 42405 498036 1103592 1024 128 17173 29745 306941 933525 1024 256 12543 36138 1041758 1268896 1024 512 18570 54950 803728 910953 2048 4 6326 4840 170968 141564 2048 8 4688 6908 252810 134508 2048 16 13829 24535 966920 899393 2048 32 16959 26276 379115 654979 2048 64 16963 20318 656431 656632 2048 128 39697 39358 1032344 1134613 2048 256 34031 58727 897045 1516904 2048 512 44248 44437 423320 292903 4096 4 4090 5934 168455 173076 4096 8 6167 8259 363696 378696 4096 16 16760 17683 480760 415627 4096 32 21957 18916 547377 598751 4096 64 16938 23914 305144 872393 4096 128 22687 70164 1029918 1302412 4096 256 39638 54362 1143509 790867 4096 512 40504 76071 1997936 607173 8192 4 2191 5183 469428 473086 8192 8 6835 7992 408170 378245 8192 16 8511 16441 493704 515510 8192 32 13457 16074 338553 430660 8192 64 14073 21907 651347 463270 8192 128 34724 27007 534966 347560 8192 256 23387 34491 391288 249511 8192 512 28193 32806 1247276 737289 16384 4 4948 5605 286318 264035 16384 8 9114 10181 520011 376046 16384 16 8890 13796 620677 554467 16384 32 18550 24874 581241 714519 16384 64 24757 29087 243853 318618 16384 128 30853 29501 607058 358457 16384 256 29355 43705 739047 681079 16384 512 41056 41159 1258948 520177 32768 4 5550 5097 253076 224812 32768 8 8229 12422 484231 379834 32768 16