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: Thu Aug 6 12:49:36 2026 Auto Mode Machine = Linux oleg160-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-oleg160-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 1635 6523 546928 441646 64 8 3288 22409 818885 821391 64 16 4676 21024 886494 666414 64 32 3437 15148 399573 901377 64 64 3846 20513 877797 1526887 128 4 2474 4084 109681 19300 128 8 6047 14380 794416 472678 128 16 6984 14800 847059 612303 128 32 6212 17107 727658 549618 128 64 6670 41557 934004 284388 128 128 8887 31381 1363288 1598754 256 4 2162 2499 709299 500157 256 8 3541 5848 251709 654798 256 16 3628 6234 984356 812944 256 32 3467 5944 556398 810490 256 64 10085 42167 1058076 1066483 256 128 7871 37268 977189 1347557 256 256 16462 48092 1300235 1952947 512 4 5617 4340 268643 270470 512 8 5515 6117 142455 728255 512 16 14235 18146 643189 806171 512 32 19961 14997 1190529 1078159 512 64 22234 56851 1672748 770037 512 128 17492 56425 1387437 942786 512 256 9103 50991 864942 835010 512 512 15295 96110 1434711 3182373 1024 4 5106 7958 328542 142298 1024 8 14891 9826 435957 199804 1024 16 15427 6321 1107005 244215 1024 32 20437 31317 571458 524044 1024 64 17610 12593 143295 1080275 1024 128 19337 61417 1563622 1331440 1024 256 16676 44185 1374474 1132697 1024 512 17062 43428 1094034 1727102 2048 4 8044 9015 414996 193555 2048 8 13914 17813 467153 438915 2048 16 24608 15563 502458 1004928 2048 32 26867 33144 515732 738042 2048 64 32304 62315 1016463 707642 2048 128 15726 65435 1659632 377499 2048 256 38461 69690 1883837 941176 2048 512 38142 89261 897889 910258 4096 4 5033 3367 238292 207004 4096 8 9209 13942 269012 284285 4096 16 14951 10973 499824 266632 4096 32 12817 22884 563555 227874 4096 64 16453 19592 644024 749629 4096 128 23241 25612 404262 289102 4096 256 28115 44622 652735 457449 4096 512 39142 62026 665040 175658 8192 4 4301 1941 171863 167162 8192 8 8761 8216 327748 262386 8192 16 10513 9740 626638 450059 8192 32 12867 18409 295934 369241 8192 64 21670 43022 324875 427754 8192 128 14582 44154 877468 481884 8192 256 17056 37963 826217 818697 8192 512 19475 39470 811580 684377 16384 4 5188 3579 110116 274645 16384 8 6349 5993 705960 393778 16384 16 10274 9529 261993 203670 16384 32 11565 19638 932601 783853 16384 64 19357 20687 410697 347310 16384 128 25159 43321 901998 611460 16384 256 26652 35250 974885 518810 16384 512 27653 41086 928907 815411 32768 4 4439 3696 152922 143861 32768 8