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: Fri Aug 14 17:55:42 2026 Auto Mode Machine = Linux oleg248-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-oleg248-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 4027 10641 1033216 508587 64 8 4238 19758 811459 831569 64 16 7388 27336 1066042 1285575 64 32 5876 40483 901377 889431 64 64 4221 62560 111300 1841049 128 4 4692 12976 366763 418513 128 8 5679 19311 571257 537512 128 16 8305 21422 135751 1409828 128 32 14986 70180 1074159 919605 128 64 12450 68743 992724 1557024 128 128 8363 110928 1561553 1684006 256 4 4191 6992 561343 103845 256 8 10117 9673 690151 309989 256 16 6386 21151 839644 249486 256 32 5312 10475 937106 251473 256 64 12550 23840 1298662 1325925 256 128 12089 114595 1495866 1248819 256 256 13882 54317 1570244 1805197 512 4 4905 7530 446387 693675 512 8 5794 6643 417326 482493 512 16 2758 22284 863551 795127 512 32 17523 25850 685482 453456 512 64 10431 12085 1075459 975328 512 128 21304 69095 557092 1221684 512 256 39558 81918 1523247 1426135 512 512 33166 45386 751707 97987 1024 4 4017 4430 132573 184802 1024 8 7683 18540 869989 506672 1024 16 13887 46801 440021 878890 1024 32 12286 40335 872995 586839 1024 64 32275 55300 747496 703308 1024 128 36416 63393 941093 1229309 1024 256 29085 69348 1352828 879790 1024 512 43993 108153 1212991 294159 2048 4 8524 9458 177779 267709 2048 8 10270 8873 381439 259963 2048 16 20386 25466 1127760 532352 2048 32 27868 25598 1244231 815618 2048 64 25683 38691 827084 735074 2048 128 32289 53949 966920 523240 2048 256 28998 71535 911031 926257 2048 512 31624 58601 408950 708459 4096 4 6696 6656 254490 290515 4096 8 10989 11294 400352 362637 4096 16 16704 22953 776638 575524 4096 32 18673 27634 544738 578119 4096 64 29048 38461 1452498 613899 4096 128 38719 69034 555626 795961 4096 256 27945 58901 1591788 740549 4096 512 34561 49239 1563966 915341 8192 4 7109 5679 195228 283382 8192 8 11464 14286 531746 361279 8192 16 16625 16611 454982 484214 8192 32 20302 30466 549502 774726 8192 64 21169 35596 1033412 1098112 8192 128 38542 79112 782952 696192 8192 256 28090 43860 972928 655622 8192 512 35033 57634 1176509 867718 16384 4 5293 7419 496862 367863 16384 8 11332 11674 348922 375539 16384 16 21155 20108 545714 569502 16384 32 23069 34836 828936 545878 16384 64 33488 41500 987990 538930 16384 128 30052 51158 969931 1280197 16384 256 38997 47699 887632 608779 16384 512 39292 59077 854583 730088 32768 4 6224 4759 212830 190644 32768 8 7229 10182 203129 306111 32768 16 15432 16478 706449 667222 32768 32