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 Jul 28 18:37:57 2025 Auto Mode Machine = Linux oleg125-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-oleg125-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 7457 11646 293434 274809 64 8 11183 34314 357529 349613 64 16 13640 53829 645579 440921 64 32 9056 72888 720041 771797 64 64 13657 93701 1066042 1392258 128 4 7375 5687 191889 247656 128 8 17389 9934 492178 438689 128 16 6374 7429 649331 495814 128 32 12071 19649 771581 761728 128 64 17891 57018 633995 1024942 128 128 28445 114892 1332828 1689305 256 4 10603 19157 274137 354627 256 8 17468 26564 472430 59672 256 16 24727 59925 660030 611189 256 32 24481 88186 927393 750970 256 64 39078 61894 1219045 1235882 256 128 40402 28473 1413179 1361224 256 256 28249 148659 1514860 1267990 512 4 14497 18406 272633 66648 512 8 25992 6672 344103 414267 512 16 12423 55889 605128 119878 512 32 35332 82542 882718 893740 512 64 39347 83657 1053821 1023680 512 128 55423 80238 259238 1251589 512 256 63936 153943 1302447 430978 512 512 38203 162690 1438555 1827947 1024 4 16397 14569 274898 129538 1024 8 27443 20040 243398 420176 1024 16 18538 51169 617642 644424 1024 32 32956 25545 690530 877454 1024 64 41245 99862 1072185 957884 1024 128 61357 90755 1286763 1125277 1024 256 20174 54462 1356245 1229309 1024 512 22520 31940 1405050 1183575 2048 4 8110 15126 137035 74135 2048 8 20454 18784 116847 383379 2048 16 11316 32306 692859 499623 2048 32 35903 27296 896671 831165 2048 64 15892 83332 653684 635265 2048 128 36544 51381 1310279 375437 2048 256 34745 51842 1601164 1365474 2048 512 30109 60226 1711208 1534244 4096 4 6848 13584 216034 173287 4096 8 17042 11847 205725 184837 4096 16 22310 44384 285656 253589 4096 32 23322 69886 718979 683237 4096 64 35621 60056 1201153 877831 4096 128 47045 47884 345624 231832 4096 256 57611 36736 1572987 1313666 4096 512 46244 62523 1240083 1319518 8192 4 1870 6169 135806 129491 8192 8 9612 13400 251543 226523 8192 16 24012 28469 656361 436531 8192 32 29448 35903 493945 754200 8192 64 26010 38591 1012969 362078 8192 128 35510 58744 1041178 620987 8192 256 28301 33206 926592 1227624 8192 512 28069 42508 565622 1097972 16384 4 6132 9997 228913 123301 16384 8 9970 16775 196639 233250 16384 16 25371 29350 188960 260800 16384 32 25816 32476 737920 583789 16384 64 28304 38252 599532 435896 16384 128 37684 59325 1063492 557829 16384 256 36798 58017 693150 593643 16384 512 59537 75476 1456883 977214 32768 4 8681 10426 137346 147382 32768 8 12020 15180 195617 284688 32768 16 19752 27956 343171 528660 32768 32 27496 40315 676746 762474 32768 64 40115 36622 657609 406576 32768 128 35095 65240 901955 952361 32768 256 43916 91462 602319 1104718 32768 512 64144 94270 435016 698497 65536 4