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: Tue Jun 23 10:38:23 2026 Auto Mode Machine = Linux oleg124-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-oleg124-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 2078 2888 633392 453587 64 8 2582 8215 831569 587635 64 16 5262 20976 1049372 874936 64 32 4308 19802 1029254 60720 64 64 6021 53646 939223 1828508 128 4 2981 5322 621518 188520 128 8 3641 3022 156303 643108 128 16 3632 12095 985435 256042 128 32 6010 69988 1067750 1057236 128 64 5581 18111 1172704 1306873 128 128 5774 26304 407707 1852520 256 4 6274 8536 621448 349206 256 8 9080 11570 713541 82819 256 16 10275 30125 1040643 606700 256 32 4661 20453 1084800 602614 256 64 10991 44382 1286217 612584 256 128 11183 38918 1354356 1561112 256 256 14377 84018 2435861 1523457 512 4 4520 2368 184971 99744 512 8 8479 9925 148534 107112 512 16 6361 16457 296294 973559 512 32 6732 12109 738777 616772 512 64 24307 13435 698412 1252318 512 128 19418 21900 451549 444815 512 256 21913 63007 471476 184178 512 512 25457 97804 1429934 1293037 1024 4 6744 3649 281474 249087 1024 8 12710 17101 745808 637253 1024 16 20175 16154 879610 761950 1024 32 21259 43028 1351126 716567 1024 64 30834 47085 900637 965203 1024 128 40707 55739 1110727 264536 1024 256 32068 70563 1556257 1345623 1024 512 32930 87851 1689730 1233900 2048 4 6747 6610 162525 154919 2048 8 6329 10165 467153 323845 2048 16 10648 22881 563244 230059 2048 32 10816 17118 524198 519004 2048 64 17852 25235 1229979 265738 2048 128 13657 35133 917551 1297023 2048 256 28620 34639 956477 972944 2048 512 23679 33064 711098 664505 4096 4 961 4227 230863 203923 4096 8 5181 9496 309978 172347 4096 16 15986 13111 528858 202461 4096 32 14026 19229 295121 452342 4096 64 18541 23485 542948 660667 4096 128 14098 25262 1517012 865057 4096 256 26970 39668 1435147 1031216 4096 512 23483 38652 902408 531953 8192 4 5732 3638 298446 168795 8192 8 9230 6368 203178 355754 8192 16 10058 12191 482250 342748 8192 32 15976 20983 455012 266892 8192 64 18342 25024 799290 495848 8192 128 19220 24245 851546 943461 8192 256 26826 28785 1006884 431206 8192 512 26611 51316 817645 502880 16384 4 5235 5031 96707 183447 16384 8 10269 6824 187036 378645 16384 16 13646 15138 482533 505897 16384 32 13663 16089 388136 236560 16384 64 22111 19020 373220 250879 16384 128 22139 32300 792184 472786 16384 256 24967 32004 1357641 451811 16384 512 31156 38388 766968 282971 32768 4