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 Sep 11 07:00:05 2026 Auto Mode Machine = Linux oleg642-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-oleg642-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 1287 6791 407457 454354 64 8 1740 6557 821391 760859 64 16 4090 9360 916769 519412 64 32 2488 19771 1336792 155003 64 64 2055 32502 1143223 1562436 128 4 4831 4230 499970 506097 128 8 2906 5255 549056 490380 128 16 6634 19260 662962 947186 128 32 2994 35585 1102844 914904 128 64 7554 39665 1133103 1093856 128 128 7649 66984 477725 2027414 256 4 6652 4668 386682 416371 256 8 8470 16551 850282 595264 256 16 6330 12908 1241598 951219 256 32 8763 20645 812944 442268 256 64 14838 45886 1398455 1212164 256 128 12318 79455 1497953 1471270 256 256 6452 90650 1683493 1237306 512 4 4774 7456 78373 551654 512 8 7054 8031 285881 361054 512 16 5014 7745 841884 425935 512 32 6381 24866 1169140 964378 512 64 20557 42702 816594 503890 512 128 17139 40172 1505098 563820 512 256 13112 19009 211933 664895 512 512 14962 50492 664073 2089386 1024 4 3508 4399 146767 215797 1024 8 11454 5235 885778 653047 1024 16 17220 20838 465639 651067 1024 32 13203 14177 1124099 1083819 1024 64 10576 23492 742071 413064 1024 128 23399 45519 1357961 1213334 1024 256 17676 32192 153705 203092 1024 512 22925 47971 517478 238917 2048 4 3258 5829 334254 377998 2048 8 7940 13483 532220 812071 2048 16 12631 41358 462500 254820 2048 32 30515 25430 692859 1151804 2048 64 20229 31316 954882 367282 2048 128 30060 65040 362080 500118 2048 256 46562 22511 297973 1319740 2048 512 38524 38817 260523 351530 4096 4 5600 8862 198931 226310 4096 8 13302 11918 341984 347006 4096 16 12259 7543 229659 165108 4096 32 10151 12281 299281 272139 4096 64 12439 17129 311084 609608 4096 128 29084 47160 415838 486919 4096 256 33044 69960 1006624 717567 4096 512 40150 37617 668846 1367192 8192 4 8127 5530 214303 147181 8192 8 7747 10666 298269 422354 8192 16 12549 15369 731824 149178 8192 32 15274 22708 602350 696898 8192 64 22986 23464 839254 576701 8192 128 17659 43807 666121 1057326 8192 256 28731 30957 683234 476280 8192 512 22878 41964 742691 677415 16384 4 6620 5608 188684 434161 16384 8 7274 11685 169016 184319 16384 16 11789 19447 466848 334427 16384 32 20169 26835 783513 764001 16384 64 26881 34131 539815 534134 16384 128 33009 50530 818958 734843 16384 256 30244 32434 725472 531638 16384 512 32954 42042 734906 703748 32768 4 6124 6467 310435 267837 32768 8 9712 9302 649615 456251 32768 16 16073 17595 421170 387736 32768 32