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: Tue Sep 8 09:40:07 2026 Auto Mode Machine = Linux oleg640-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-oleg640-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 8056 19764 633392 560635 64 8 12918 35830 418250 743988 64 16 15767 56384 1017549 1029254 64 32 14995 61542 763021 1087638 64 64 15417 111116 1183548 1828508 128 4 13878 21951 442668 546819 128 8 14351 30381 809997 1000121 128 16 19320 57500 1175271 615814 128 32 22571 85627 2132084 948860 128 64 21007 119071 544601 1487977 128 128 15219 120542 1543594 2098744 256 4 15606 21761 855703 549283 256 8 21746 28027 815414 882426 256 16 32891 68226 831194 1195962 256 32 34330 72851 1802167 901693 256 64 37552 133470 1588832 1153561 256 128 48319 132924 1532153 1561112 256 256 49277 151384 1718521 2205688 512 4 17650 21500 474497 610982 512 8 27553 36170 739032 690996 512 16 38063 55065 1182661 890404 512 32 49708 89857 1193838 1736314 512 64 42514 116156 1446306 1309596 512 128 46038 130682 1302447 1700565 512 256 76762 172339 1475116 1541840 512 512 72337 212984 1961520 2471765 1024 4 19721 22806 875308 697143 1024 8 26187 37264 1031252 856799 1024 16 42126 49854 1270397 1163693 1024 32 52827 88421 1575091 1098792 1024 64 61310 111099 1452570 1378445 1024 128 81456 150232 1969440 1302766 1024 256 75864 151163 1825466 1338494 1024 512 69503 155390 1832475 2093262 2048 4 19206 21725 682022 695608 2048 8 32320 37749 1017426 758841 2048 16 41196 57846 1376193 1155678 2048 32 65615 88294 1356204 1264935 2048 64 63200 96110 1629410 1129540 2048 128 72950 109163 776961 1326465 2048 256 90053 124400 1372675 1263447 2048 512 73574 174670 1603854 1448358 4096 4 18700 20507 658716 616853 4096 8 34507 36988 1199476 927348 4096 16 48220 65940 1538752 1436707 4096 32 68940 84401 2074912 1387509 4096 64 79053 122283 1654964 1665070 4096 128 90138 131177 1766421 1452498 4096 256 92208 149684 1455575 1755770 4096 512 102858 139211 1912954 2077923 8192 4 19062 19957 725213 701923 8192 8 31409 35008 799774 810355 8192 16 47780 51512 1308005 1186217 8192 32 60802 79918 1712011 1151666 8192 64 81877 90562 1524402 1217575 8192 128 89615 102452 1492421 1462315 8192 256 92281 156598 1005293 1582391 8192 512 100440 162868 1852596 1486481 16384 4 19110 20160 715426 666346 16384 8 28765 34807 1061209 906137 16384 16 47409 55817 1352617 1202507 16384 32 65766 85474 1657776 1277793 16384 64 79784 116450 1550781 1505757 16384 128 96676 141254 1642678 1464834 16384 256 96773 129309 1771038 991339 16384 512 100813 143922 1895876 1246209 32768 4 17802 20235 751337 659012 32768 8