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: Fri Sep 4 20:46:06 2026 Auto Mode Machine = Linux oleg446-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-oleg446-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 2225 7869 492717 444572 64 8 1927 8413 969761 842003 64 16 4715 27445 598110 592827 64 32 2894 12779 1310683 1168097 64 64 5096 56289 1518251 1336792 128 4 3368 7542 601330 261275 128 8 5817 7785 680612 526961 128 16 2625 23720 1093856 859260 128 32 9165 35099 1067750 320940 128 64 6982 59062 1455701 1346196 128 128 9538 60692 1278855 1705404 256 4 4830 6747 83191 336405 256 8 6051 7478 831194 598249 256 16 3666 27938 512818 868157 256 32 15202 44344 1201314 1062263 256 64 16023 64066 1391207 1237306 256 128 18075 75203 1463250 1610276 256 256 8189 41210 1117543 351147 512 4 8733 11767 706221 270470 512 8 14454 10941 186919 827289 512 16 7276 16672 1143004 698640 512 32 12115 23088 693003 601568 512 64 10078 16523 1528669 984720 512 128 12719 66692 949875 1139970 512 256 13428 77706 1372364 552363 512 512 32409 87045 282868 1551867 1024 4 6159 4807 80031 169729 1024 8 12343 12825 735590 337182 1024 16 4230 6254 599537 509437 1024 32 8301 38982 974179 997019 1024 64 25543 55255 896502 1284839 1024 128 12636 77782 227912 609145 1024 256 21418 41278 514071 1068717 1024 512 36888 80591 477388 1452570 2048 4 5259 6156 249599 238969 2048 8 7024 9111 159164 238358 2048 16 20919 13048 398534 287117 2048 32 25075 20049 763562 295229 2048 64 28217 50340 899487 1230683 2048 128 37324 59578 947300 788298 2048 256 47935 75905 522317 527449 2048 512 45497 77923 1135362 797224 4096 4 8286 6586 239347 120117 4096 8 9193 12159 426227 352893 4096 16 16537 12464 176240 169656 4096 32 13914 19673 300647 362064 4096 64 32260 29534 314041 639398 4096 128 18577 37950 1466509 694141 4096 256 54805 59778 678836 477778 4096 512 31961 35597 498837 801755 8192 4 7319 6902 241075 220434 8192 8 7395 9008 306379 476749 8192 16 16173 16707 597822 316954 8192 32 21360 24399 522575 618550 8192 64 23529 35229 638956 635622 8192 128 23098 30956 700235 700521 8192 256 26274 41509 1040012 613908 8192 512 24977 32232 900228 831515 16384 4 5720 5929 308869 167448 16384 8 8172 8932 455627 448874 16384 16 12205 16498 418651 507530 16384 32 21805 16783 930429 614275 16384 64 19764 24617 311465 352463 16384 128 34010 27635 983381 677861 16384 256 27926 31271 1038406 705388 16384 512 24214 46357 526103 293467 32768 4 4841 5708 266217 233801 32768 8 8807 11038 453529 404442 32768 16 14328 19742 745254 606345 32768 32 16647 27855 601557 327716 32768 64