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 Jun 29 14:11:36 2026 Auto Mode Machine = Linux oleg242-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-oleg242-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 5286 6480 300328 610350 64 8 1522 27175 780776 727850 64 16 2904 43956 1163036 916769 64 32 3256 36344 392561 1279447 64 64 6713 64329 1279447 1933893 128 4 6302 3089 246180 173195 128 8 4055 12983 881842 739689 128 16 5514 12602 537512 976473 128 32 4075 67874 1424795 1243315 128 64 2779 10162 1152564 895074 128 128 3825 14367 1133103 14977 256 4 3094 2911 507966 426628 256 8 4426 11111 808050 436870 256 16 2068 10281 937924 859127 256 32 5468 28842 1304976 980760 256 64 6012 19121 1471270 1286217 256 128 8414 22501 1312954 606700 256 256 7534 46862 1729594 1570244 512 4 3111 3397 581846 415952 512 8 10916 14937 527792 468493 512 16 22284 20109 368299 640694 512 32 22769 30774 516618 505908 512 64 27939 46677 958781 600895 512 128 31803 59591 1467055 1155924 512 256 10072 51354 275997 1605228 512 512 8996 158663 1821745 2124526 1024 4 6303 10774 637537 448148 1024 8 16337 19600 577917 799985 1024 16 13270 14264 1153071 197190 1024 32 24735 66308 1169078 925877 1024 64 33493 71824 966071 205208 1024 128 32092 78921 1599731 914249 1024 256 49056 56567 955327 1097669 1024 512 39716 72577 735716 1687075 2048 4 8586 8397 249274 256417 2048 8 4541 8035 296084 216170 2048 16 7816 17066 1134013 974268 2048 32 26468 28051 1325646 1122162 2048 64 18757 23611 664505 194545 2048 128 32806 53767 611870 816005 2048 256 27252 59187 299898 493368 2048 512 27803 29094 1892971 1460921 4096 4 5944 8143 178436 238945 4096 8 7426 13413 475727 532695 4096 16 9926 20612 343543 496674 4096 32 12244 33113 644024 596651 4096 64 14713 31343 510275 831841 4096 128 36747 30138 1540960 981998 4096 256 30938 42548 563241 700167 4096 512 25432 53216 1728912 617696 8192 4 3792 7269 262394 265800 8192 8 12841 13211 698144 847158 8192 16 25803 18329 715204 565556 8192 32 23416 29131 538133 530089 8192 64 24068 37864 887348 737605 8192 128 33766 41404 582518 368481 8192 256 39193 58872 830490 802838 8192 512 33897 83570 497384 544754 16384 4 4072 6094 415784 274609 16384 8 11074 11636 307052 204490 16384 16 9456 15332 609183 560212 16384 32 21458 26578 697101 709546 16384 64 27661 35829 1086116 442116 16384 128 40117 42890 530399 923874 16384 256 30241 65587 1015121 848432 16384 512 35177 59374 1178442 1138252 32768 4