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 Jun 7 13:17:12 2026 Auto Mode Machine = Linux oleg227-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-oleg227-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 1289 8330 346008 542506 64 8 4195 27921 877797 454354 64 16 4578 46475 481234 901377 64 32 4743 33774 1255511 1049372 64 64 6429 53872 1255511 1933893 128 4 1806 6765 392505 484625 128 8 4719 22983 934004 699227 128 16 9798 24554 1142750 761728 128 32 7970 7683 1455701 992724 128 64 7090 39987 1266785 1406136 128 128 13648 86025 1508887 1332828 256 4 9445 4119 399932 332036 256 8 6190 4981 446684 817898 256 16 5272 11515 695516 876662 256 32 5817 25055 1190657 632056 256 64 15269 63303 1132871 1266495 256 128 10894 18237 1532153 1230218 256 256 36765 64097 1629830 725106 512 4 9701 5596 129586 149226 512 8 9644 7798 524056 570713 512 16 6686 15851 990168 1047141 512 32 12085 41792 705294 477557 512 64 20177 24492 242057 111454 512 128 25199 76863 1049187 1320061 512 256 31291 126020 1605228 1441452 512 512 34517 73817 605811 216309 1024 4 5442 8149 635180 207158 1024 8 8577 10729 383109 781641 1024 16 23282 37278 595711 457553 1024 32 27032 52704 1238168 525647 1024 64 27424 60267 638390 796868 1024 128 41593 66592 767670 146787 1024 256 42284 89676 262563 268489 1024 512 11383 78950 1116792 1503942 2048 4 4631 7239 137090 359234 2048 8 6283 7817 778157 578688 2048 16 16874 22911 590543 347351 2048 32 28122 34290 706478 552307 2048 64 35049 58794 781627 1393156 2048 128 58256 54501 1166982 665793 2048 256 44984 130946 530020 1622945 2048 512 59788 90327 2169281 2343259 4096 4 9481 4071 294378 324897 4096 8 8468 11974 275734 495285 4096 16 1951 21491 762066 438499 4096 32 18849 18756 688853 752091 4096 64 39004 60804 1462389 1152175 4096 128 55811 120498 2063696 795481 4096 256 24946 28620 504195 454255 4096 512 40013 86934 223871 660438 8192 4 6469 4493 207120 262673 8192 8 9214 12879 321077 248407 8192 16 14517 16848 515898 516355 8192 32 21352 25916 850324 471943 8192 64 28375 37217 673802 936875 8192 128 33626 46801 1020157 609206 8192 256 35317 40111 795349 713274 8192 512 27354 37033 392620 522885 16384 4 5113 8994 218444 284075 16384 8 8951 12424 530399 547483 16384 16 16399 22139 833703 671227 16384 32 22253 27302 687450 616961 16384 64 28387 34879 954280 820640 16384 128 32505 43304 986940 883660 16384 256 26225 46204 1268710 916530 16384 512 38195 48220 1048915 717743 32768 4 5253 5631 351855 375710 32768 8 8753 12529 737821 445696 32768 16