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: Wed Aug 26 18:12:06 2026 Auto Mode Machine = Linux oleg147-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-oleg147-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 2903 11289 342040 528618 64 8 5702 19086 889431 653436 64 16 5962 10334 998622 789967 64 32 6240 42161 1933893 1562436 64 64 13837 50308 1933893 280847 128 4 5565 11746 571257 90006 128 8 6470 10992 809997 757430 128 16 7966 53288 1254941 457376 128 32 13358 38825 242839 1102844 128 64 9334 46378 1291158 1363288 128 128 3994 61211 942199 1319723 256 4 7382 8207 542347 337781 256 8 6746 13403 847597 785010 256 16 8775 22387 1208072 1011241 256 32 11551 42860 1163562 1158540 256 64 27568 121096 1422540 1391207 256 128 21774 85050 613985 1619994 256 256 24132 151128 870268 2192179 512 4 9764 10327 719230 506385 512 8 10094 10610 946526 751707 512 16 24422 20311 1770674 895230 512 32 8547 47402 752761 981121 512 64 15119 79381 1450212 1174254 512 128 26878 144516 785241 1410215 512 256 43040 73111 1968713 1160923 512 512 18435 156810 525724 1064266 1024 4 8493 6188 163975 334634 1024 8 4210 12283 1250061 754587 1024 16 28929 39816 874417 585879 1024 32 13588 104970 1276817 1343938 1024 64 67302 48643 1414304 730958 1024 128 49475 47603 1267398 1687075 1024 256 43867 86611 1437980 1756054 1024 512 38082 101577 1594978 899694 2048 4 4570 14149 360560 344772 2048 8 10492 20263 958291 541650 2048 16 10624 18016 613926 538391 2048 32 23584 36484 1366343 560342 2048 64 30179 21373 1019842 323442 2048 128 14049 23027 1523630 1385740 2048 256 15169 25055 401571 122233 2048 512 20981 24947 340710 525384 4096 4 5899 5307 385580 241213 4096 8 6861 4961 188885 182077 4096 16 11218 15658 337423 309436 4096 32 1714 25013 256366 398597 4096 64 13042 20754 1334586 330161 4096 128 29162 33434 1425146 1612708 4096 256 67061 116535 1141230 2093113 4096 512 19498 41589 404624 466834 8192 4 7741 4567 173449 240157 8192 8 8281 7706 154755 210546 8192 16 14033 15779 693004 336883 8192 32 16773 34586 682379 741889 8192 64 27190 35425 1287421 818560 8192 128 27346 27751 842794 652596 8192 256 39841 59517 1217791 788830 8192 512 38710 35844 513538 877827 16384 4 6320 8434 282824 234984 16384 8 11634 13326 231749 412363 16384 16 14641 24240 891988 565337 16384 32 35724 35044 404701 761942 16384 64 35326 47567 1114096 587091 16384 128 35928 43730 1334104 864582 16384 256 30352 51591 898049 618332 16384 512 30840 46670 723227 669005 32768 4 5942 6832 394919 416895 32768 8 7736 11589 476993 325990 32768 16