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 13:54:10 2026 Auto Mode Machine = Linux oleg211-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-oleg211-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 2066 5303 627470 297664 64 8 1067 5391 780776 249057 64 16 2289 6388 877797 780776 64 32 3983 32389 192730 703068 64 64 4558 35916 136482 1828508 128 4 3592 10258 566435 493989 128 8 4837 7824 805138 809997 128 16 4574 17985 312897 330625 128 32 7668 53559 1291158 985435 128 64 8859 46938 1281909 1111981 128 128 9144 39875 1206978 1048974 256 4 6438 9206 443730 489442 256 8 9519 16377 757326 366239 256 16 11346 23289 901693 889002 256 32 11395 35266 668246 933846 256 64 10237 38164 1254656 970126 256 128 9440 39256 1099237 1142514 256 256 15050 29805 1694118 2081678 512 4 3859 3080 219740 288764 512 8 4557 11321 558832 415952 512 16 9616 18705 689886 568296 512 32 10171 19864 1273861 603089 512 64 6184 35032 1286067 1045103 512 128 18398 47676 1293037 860437 512 256 6546 69069 1086890 1418599 512 512 25116 72759 1640796 1605228 1024 4 8827 5783 323128 536079 1024 8 10711 16349 787084 179842 1024 16 15220 15332 947320 382359 1024 32 24129 41659 447354 922497 1024 64 27878 35100 350786 671423 1024 128 27319 38925 996094 137027 1024 256 14158 59890 1808555 473180 1024 512 18209 20720 670166 1689730 2048 4 6875 3431 137679 354885 2048 8 6660 10227 383945 854396 2048 16 10560 14828 1207501 384460 2048 32 15299 24097 1392253 1132070 2048 64 17188 17098 481990 1287111 2048 128 38252 36316 805371 1369829 2048 256 38404 36794 584993 1459680 2048 512 22936 60236 1449336 518346 4096 4 4251 4699 479686 317031 4096 8 5224 9214 112877 312982 4096 16 24228 18770 258259 348533 4096 32 16486 18333 1504787 746502 4096 64 12397 23100 418727 537546 4096 128 15246 29846 215600 322773 4096 256 14802 23211 688632 514647 4096 512 25396 35352 755298 588657 8192 4 7188 3669 254805 368260 8192 8 6048 6457 261082 240001 8192 16 6705 11289 626970 345755 8192 32 9499 18142 552506 228795 8192 64 18217 22149 480583 826396 8192 128 23909 30573 843581 732214 8192 256 24305 35490 614919 650681 8192 512 38223 75724 1061147 593280 16384 4 3469 5221 227312 252445 16384 8 7363 13711 622093 458821 16384 16 10488 13718 410984 407521 16384 32 13964 17774 276653 344607 16384 64 16948 21630 828736 602354 16384 128 24484 24433 946278 340249 16384 256 21477 24784 349974 335647 16384 512 24785 38840 476167 552657 32768 4