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: Sun Nov 16 17:37:49 2025 Auto Mode Machine = Linux oleg243-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-oleg243-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 2521 4056 228493 245190 64 8 4269 27814 146063 353294 64 16 5312 40030 659861 587635 64 32 5748 60900 913649 780776 64 64 3196 70570 1429325 763021 128 4 4193 16764 283188 272965 128 8 3854 22764 415597 410199 128 16 10549 23934 253983 744820 128 32 9560 65139 816154 490380 128 64 9877 76654 955616 776042 128 128 11168 107121 1440082 387966 256 4 8765 12074 288267 64051 256 8 4631 14314 412849 445202 256 16 8827 34925 532397 264741 256 32 14330 70502 947860 831194 256 64 6365 86426 1175022 286958 256 128 7211 63731 1523457 1471270 256 256 9550 105602 1629830 1543163 512 4 5615 4442 259489 256268 512 8 9896 7161 107385 99879 512 16 13219 33481 766464 616950 512 32 12798 32086 882718 162076 512 64 14287 90876 326077 1255246 512 128 17040 27381 1410215 853257 512 256 14776 103205 1600443 1472083 512 512 9298 85979 866338 2187279 1024 4 7311 7920 165268 60097 1024 8 6751 10225 70228 336522 1024 16 19927 8836 262083 268204 1024 32 11942 66954 894262 823926 1024 64 37745 36502 1097669 1007781 1024 128 35349 107347 1046071 1131503 1024 256 32248 31003 841357 1265531 1024 512 19712 121169 1600327 336495 2048 4 7900 6661 224070 225749 2048 8 11832 25331 366577 424701 2048 16 12508 44164 623823 425606 2048 32 12087 54042 929666 847316 2048 64 25252 85967 762207 1056208 2048 128 19560 37268 1322992 938092 2048 256 20798 54257 418800 406416 2048 512 16340 59559 657889 723679 4096 4 5605 8455 91705 90417 4096 8 10017 16504 443582 143252 4096 16 21388 35324 433202 540148 4096 32 27499 50168 929203 414784 4096 64 52992 78114 1030227 469770 4096 128 54763 65182 579523 807104 4096 256 43752 35487 653157 213266 4096 512 31858 101526 1246109 1493277 8192 4 10039 10293 220951 160159 8192 8 19282 18342 334656 341206 8192 16 28632 38416 614886 532397 8192 32 38532 54278 577748 545074 8192 64 42791 45369 513930 261492 8192 128 46605 91503 1066814 624917 8192 256 48609 61134 433299 586776 8192 512 49843 57488 1259945 1296407 16384 4 5832 5370 92698 151293 16384 8 10140 10494 139146 97642 16384 16 14479 17228 532536 381315 16384 32 18111 39194 773155 225323 16384 64 16374 33962 238771 353682 16384 128 19216 40290 886956 833581 16384 256 28355 31546 1273932 1365573 16384 512 38739 44530 493923 230662 32768 4 6017 9116 79395 90903 32768 8 10839 15245 221766 376004 32768 16 16930 25672 343811 457896 32768 32 24542 28597 465925 629694 32768 64 23693 30796 473958 574876 32768 128 28317 48185 902648 330319 32768 256 30260 36033 1525865 840333 32768 512 44041 34623 913975 385818 65536 4