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 Jul 15 01:29:28 2026 Auto Mode Machine = Linux oleg359-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-oleg359-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 5548 17391 463774 520419 64 8 7012 23574 780776 481234 64 16 8378 38955 1066042 799377 64 32 7239 48264 1033216 913649 64 64 8401 70182 1363961 1421755 128 4 8498 16397 526444 576780 128 8 10178 23473 821147 684081 128 16 15765 43053 1111981 140365 128 32 10158 65441 1487977 747933 128 64 16518 89885 1303699 1539168 128 128 18516 118310 1451764 2377579 256 4 9561 15790 609455 406288 256 8 13647 24397 699594 733527 256 16 18361 47397 1629830 766517 256 32 15185 45779 750445 627256 256 64 17933 78865 2152625 984356 256 128 26374 93159 1504249 1639786 256 256 23605 114791 1704877 1802167 512 4 14493 15815 761031 644927 512 8 15577 27271 944860 598217 512 16 22918 47926 1071167 1210664 512 32 34290 66115 1809465 843537 512 64 33238 80352 1196499 1387437 512 128 48179 103519 1772135 1305615 512 256 34390 118326 1255246 909640 512 512 40868 141200 1537424 1834193 1024 4 11469 15096 436888 508954 1024 8 23431 26705 994941 921705 1024 16 31871 43270 1336827 1141730 1024 32 43757 85228 1076755 1082454 1024 64 58503 91598 909410 1169078 1024 128 55154 104384 1446211 1454537 1024 256 60857 105579 1488307 1546729 1024 512 55919 86802 1796451 1524224 2048 4 14341 16316 800343 714588 2048 8 22643 28129 994688 740396 2048 16 33347 44016 1230683 884665 2048 32 51148 70182 1331606 1204792 2048 64 49379 98230 1462911 1207501 2048 128 62177 114874 1588726 1171598 2048 256 66679 95983 1588726 1170321 2048 512 68168 97537 1761024 1437211 4096 4 14888 16470 629765 301375 4096 8 23838 28693 914902 964900 4096 16 37424 45693 1169987 1216893 4096 32 53601 75394 1292904 1259908 4096 64 46900 76216 1492758 598043 4096 128 78728 102197 1763338 1155119 4096 256 52206 98338 1749690 1492758 4096 512 67314 126255 1987305 1637611 8192 4 14066 14438 630340 743913 8192 8 23070 26005 868441 617472 8192 16 33922 44551 1043582 911742 8192 32 48315 62058 1404168 1112620 8192 64 64147 70908 1064302 1168785 8192 128 67507 97637 1772417 1302797 8192 256 79699 90478 2074011 1325105 8192 512 74773 101564 1828150 1225653 16384 4 14783 16069 606725 571230 16384 8 25557 28339 898096 860501 16384 16 40032 44979 1132194 1059916 16384 32 50044 62941 1315336 1229003 16384 64 60974 74179 1549487 1413143 16384 128 73377 101594 1577661 1234101 16384 256 82875 100185 1699050 1294668 16384 512 88141 112821 1575383 1455587 32768 4