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 Sep 16 19:37:55 2026 Auto Mode Machine = Linux oleg412-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-oleg412-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 2269 5913 376589 542506 64 8 3525 8253 842003 743988 64 16 4475 37963 145429 653436 64 32 5251 40483 1029254 273409 64 64 4718 62560 1336792 1304314 128 4 7484 2969 627328 513847 128 8 5073 17604 921183 179267 128 16 7099 36376 962469 624409 128 32 12366 42340 1278855 947186 128 64 4861 57475 1209698 836500 128 128 7291 110335 1543594 1710838 256 4 5400 4191 670332 417667 256 8 6011 15329 654798 507725 256 16 11767 18225 270886 797250 256 32 10135 10638 1213534 53232 256 64 14265 92485 1103757 1123389 256 128 24542 43221 437760 251179 256 256 15333 70973 856386 1369908 512 4 3831 4894 525082 268509 512 8 14344 18959 360086 712076 512 16 16064 20045 571472 629058 512 32 18428 44505 948197 780390 512 64 16619 34944 1082507 1190529 512 128 21119 66133 97992 740050 512 256 24585 20233 166551 719954 512 512 28183 82116 1565443 2265742 1024 4 6857 9201 135467 262019 1024 8 11545 21258 388762 373027 1024 16 16404 39386 1073525 864212 1024 32 25737 38689 592261 758050 1024 64 21379 56512 1146607 905384 1024 128 41025 42015 1497127 1267024 1024 256 39428 53685 227105 1341839 1024 512 32933 100580 1662264 393679 2048 4 4623 6485 192281 174447 2048 8 13383 16535 852277 406916 2048 16 38204 25971 575778 967465 2048 32 23833 35540 1244953 1114157 2048 64 18090 34032 585791 286390 2048 128 26716 47708 765672 460838 2048 256 23681 30168 1101724 1442279 2048 512 21774 41991 260895 738550 4096 4 6990 4130 373517 193746 4096 8 7742 11136 471187 231925 4096 16 15553 19134 236941 532497 4096 32 16038 29013 749074 601308 4096 64 15387 20168 540301 183848 4096 128 20186 23570 381980 352741 4096 256 30897 57586 775026 556743 4096 512 27709 28050 1802940 445411 8192 4 4299 4437 275482 291998 8192 8 14536 9583 314990 395176 8192 16 15462 9815 450284 584599 8192 32 21519 35916 404285 528653 8192 64 30439 38282 519171 206217 8192 128 23400 38313 863965 680636 8192 256 32171 40211 1064038 270632 8192 512 34045 31015 338750 776863 16384 4 7425 5448 292101 145896 16384 8 8372 9798 496274 387318 16384 16 13897 24846 802630 547174 16384 32 21081 25865 941442 767834 16384 64 31337 45045 755235 709451 16384 128 28625 41451 621666 509596 16384 256 29208 48994 560121 555166 16384 512 42070 47584 668764 780186 32768 4 5757 6169 207652 344654 32768 8 8639 10268