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: Mon May 25 03:22:22 2026 Auto Mode Machine = Linux oleg207-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-oleg207-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 1865 3539 124981 225234 64 8 2297 5096 811459 603489 64 16 3877 20888 1033216 811459 64 32 3933 16671 1033216 743988 64 64 6928 37361 1066042 1518251 128 4 7629 10517 1123617 468962 128 8 2974 4161 757430 345965 128 16 8180 14160 405245 370050 128 32 8099 22703 1000121 826202 128 64 5169 43039 824932 343970 128 128 3966 61859 1508887 913347 256 4 6906 4593 520272 498995 256 8 8796 16206 567575 706964 256 16 10721 9261 898674 853662 256 32 10726 31604 1016025 815414 256 64 12188 54641 292269 781013 256 128 13037 155709 1471270 1319408 256 256 19178 32610 1683493 1142514 512 4 4715 6990 523035 519241 512 8 6768 25203 575917 306923 512 16 6166 33844 478942 610287 512 32 10622 66311 1051242 1007827 512 64 19469 70154 630536 308999 512 128 31128 28274 593259 943200 512 256 28530 118764 1479181 1236455 512 512 24629 68385 1589779 269047 1024 4 5607 4773 127872 229593 1024 8 10748 17500 494424 535011 1024 16 24065 13375 736725 85446 1024 32 13747 38534 373286 489465 1024 64 17452 49150 550862 593899 1024 128 27045 82533 1102176 1174513 1024 256 44722 72593 230778 974400 1024 512 63159 42170 1548960 1675884 2048 4 5936 7003 216514 217066 2048 8 9979 9147 297757 310680 2048 16 16356 21972 1131474 1001881 2048 32 14089 19133 319105 498898 2048 64 27929 34428 704046 698720 2048 128 23687 49641 1191423 1438174 2048 256 43162 52922 1748834 739313 2048 512 32293 84961 230059 1647852 4096 4 5479 6164 344549 315488 4096 8 10558 7795 494743 367351 4096 16 26003 24288 331198 384528 4096 32 19930 32148 991290 953864 4096 64 19794 39994 1000236 822168 4096 128 28840 41609 1206129 1218620 4096 256 41716 60124 619478 338147 4096 512 37566 72645 846974 958815 8192 4 9280 9999 200028 400762 8192 8 12377 16524 434154 533090 8192 16 17662 24996 883810 1217230 8192 32 31260 41834 791046 585316 8192 64 38148 54589 1208794 886089 8192 128 52077 50972 1241373 597085 8192 256 44006 53444 1697464 989857 8192 512 39214 51401 861042 479116 16384 4 6162 7287 178944 157416 16384 8 11673 16434 496091 523853 16384 16 16876 19335 276127 323346 16384 32 27464 33349 501361 708310 16384 64 24456 36538 1106739 470022 16384 128 28560 35413 652855 478308 16384 256 42588 61673 1164701 429304 16384 512 51922 63728 504586 508442 32768 4 6590 8216 519047 574342 32768 8 16848 11542 443044 488607 32768 16 14185 10759 496973 355343 32768 32 21384 31136 1070990 826741 32768 64