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: Sat Aug 8 01:21:27 2026 Auto Mode Machine = Linux oleg109-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-oleg109-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 1759 9969 367817 780776 64 8 5016 27350 889431 1017549 64 16 4983 44108 1083249 901377 64 32 5653 42752 1492919 1143223 64 64 5052 72163 801764 1828508 128 4 5311 10094 214765 609522 128 8 6400 21164 871818 848397 128 16 7967 9223 1123617 901083 128 32 6438 50218 450846 805138 128 64 9578 54935 1440082 1561553 128 128 10575 43493 1406136 1911894 256 4 4067 10811 340459 524593 256 8 9533 20061 1312954 799625 256 16 7356 16092 713067 748353 256 32 15260 37869 585845 635423 256 64 5194 31345 1479379 1024752 256 128 14002 37892 2114473 2509882 256 256 6084 84594 1673001 50987 512 4 3445 6920 114466 301536 512 8 18216 19654 694572 518740 512 16 17831 13151 1190529 520879 512 32 8253 76679 255871 1057974 512 64 19295 40819 1264113 1293037 512 128 24589 82156 1585086 1270846 512 256 7482 26892 1329871 1492545 512 512 23856 85418 764281 837942 1024 4 4464 6912 575593 538972 1024 8 5777 7249 431186 161745 1024 16 6439 12141 355932 541213 1024 32 15757 25587 1253344 640771 1024 64 17150 35301 1347311 317046 1024 128 20457 69076 941093 844168 1024 256 21460 76275 2211841 1452570 1024 512 33155 24411 1648862 1169078 2048 4 9022 7276 643787 351760 2048 8 13199 15903 325600 405629 2048 16 14921 22736 458061 291403 2048 32 25632 44241 1353639 510460 2048 64 17468 46625 1082427 1331606 2048 128 41696 68856 890905 1368956 2048 256 37903 75423 1213129 1185177 2048 512 43910 71056 218357 882394 4096 4 5794 8776 272614 393241 4096 8 13313 24779 438723 535568 4096 16 16222 25590 510791 608076 4096 32 14304 20719 939468 239698 4096 64 26619 24688 402434 639303 4096 128 24451 38819 1346933 1266876 4096 256 44399 65391 1615893 433760 4096 512 19566 47780 1688305 623728 8192 4 5486 5219 147532 145165 8192 8 9109 8604 249809 629612 8192 16 3322 26215 474596 807556 8192 32 23004 25691 266917 253043 8192 64 19736 73115 1669828 1200809 8192 128 38040 47108 1016746 726685 8192 256 29922 60211 988177 692250 8192 512 32828 61073 965817 794485 16384 4 7927 8387 446965 408061 16384 8 10599 11858 636988 521155 16384 16 17322 32011 817069 523501 16384 32 22457 27081 797359 619692 16384 64 23622 29059 539836 534707 16384 128 23936 40942 488446 652514 16384 256 36945 47263 914640 782131 16384 512 43979 55720 1527343 949363 32768 4 7763 7175 403695 292940 32768 8 10850 11535 442015 390183 32768 16 12753 16534 807311 368780 32768 32 17163 35867 611046 503419 32768 64 23376 38933 1179340 825866 32768 128 36192 41484 536548 704007 32768 256 38572 46248 763894 420436 32768 512 38218 42347 984944 939022 65536 4