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 Apr 3 01:34:22 2026 Auto Mode Machine = Linux oleg353-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-oleg353-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 1602 10389 727850 647135 64 8 2238 25858 789967 388021 64 16 3176 20043 129503 1049372 64 32 2939 19716 1421755 809014 64 64 4279 68168 1734015 1638743 128 4 1926 5016 663782 628061 128 8 4026 4571 208428 748976 128 16 7342 18537 1291158 1000121 128 32 7865 41666 1359835 240231 128 64 4645 49514 1102844 1346196 128 128 6905 47074 1504659 2326073 256 4 7719 13503 584570 675391 256 8 3749 7987 944525 547044 256 16 15513 32599 675391 1011241 256 32 8414 23568 1178892 1102624 256 64 14459 30447 817898 1226004 256 128 20882 97712 1339154 147637 256 256 9860 54158 680960 2097948 512 4 7148 8445 553645 546460 512 8 5029 16202 882718 446758 512 16 7876 12082 108290 969603 512 32 12974 50344 1320061 1199171 512 64 10158 33431 485767 520374 512 128 11320 67155 1302447 1383861 512 256 23037 35405 1571169 415952 512 512 17687 109215 787545 705294 1024 4 4807 9727 263983 386418 1024 8 10103 18318 216667 837257 1024 16 25126 44431 1031252 914249 1024 32 15945 14343 1338494 546169 1024 64 27753 24050 1135091 477175 1024 128 13008 22760 622476 481239 1024 256 20236 54494 996094 432054 1024 512 11001 61821 363124 974179 2048 4 3500 2759 156862 117823 2048 8 5956 16684 315611 874845 2048 16 10007 6685 317618 1058942 2048 32 17246 24751 470815 508827 2048 64 19977 29502 965182 1244953 2048 128 18500 24157 407495 399145 2048 256 27969 68321 514465 1470172 2048 512 40807 47967 1256425 845898 4096 4 5124 6355 571580 234663 4096 8 8005 9850 329338 371618 4096 16 12874 25720 450751 479284 4096 32 27898 17588 304668 484953 4096 64 20482 30447 1540960 663550 4096 128 22912 31196 633177 351313 4096 256 24539 48775 1710153 386639 4096 512 36480 48292 897083 287256 8192 4 1968 4433 349145 292685 8192 8 7422 9713 536369 333797 8192 16 13368 26976 436259 521646 8192 32 23554 31511 545662 504838 8192 64 19164 29577 963866 512351 8192 128 34002 30638 614007 612027 8192 256 32445 41501 740546 534933 8192 512 22772 46747 546722 404323 16384 4 5877 5816 267532 178504 16384 8 9828 9126 288292 573169 16384 16 13257 15931 581590 397245 16384 32 19154 30476 510865 552430 16384 64 22242 30168 576395 589604 16384 128 24574 33812 757433 303127 16384 256 32040 27518 500182 336275 16384 512 26452 40639 1237368 719984 32768 4 4637 5894 245377 276390 32768 8 11151 9631 361721 381959 32768 16 12816 15654 400268 556843 32768 32