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 Jul 4 00:27:48 2026 Auto Mode Machine = Linux oleg409-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-oleg409-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 2249 2272 555990 576282 64 8 2390 20499 939223 735831 64 16 4684 23669 1049372 939223 64 32 3424 9137 212570 1029254 64 64 2638 45778 1363961 1648808 128 4 2976 9832 402510 481150 128 8 3758 14196 870405 859260 128 16 5434 24984 1133103 962469 128 32 6089 45440 1363288 1121270 128 64 6768 52676 300464 864797 128 128 5724 39432 2464907 2132084 256 4 4955 9720 213518 593947 256 8 4847 6528 375328 534517 256 16 9157 21944 1178892 670332 256 32 6420 33333 1398455 545931 256 64 13180 41171 215835 1312954 256 128 8749 46250 1319408 1369908 256 256 12494 74920 1561112 156961 512 4 5522 3947 377028 341097 512 8 6805 20374 363868 323669 512 16 11605 21681 925717 960496 512 32 7615 36084 1045103 265258 512 64 10252 31805 457222 1333173 512 128 22649 42306 806474 544658 512 256 12744 29287 901241 1740536 512 512 17059 55985 1165966 1560891 1024 4 5363 6864 601636 167237 1024 8 6532 9822 262355 265550 1024 16 11727 11171 1155553 689533 1024 32 17559 43796 986485 401744 1024 64 17706 51095 452682 1175477 1024 128 21071 36999 526163 1262555 1024 256 15230 36962 1049138 1178380 1024 512 26985 39790 1643814 1460969 2048 4 5406 4501 255715 449221 2048 8 8179 11191 509069 456333 2048 16 24560 17131 943347 555773 2048 32 13950 19837 803788 1095123 2048 64 20237 32074 321554 265286 2048 128 46603 78434 1699696 616304 2048 256 37026 42507 627423 683378 2048 512 42480 73735 863066 1734007 4096 4 5295 9698 403910 282894 4096 8 11828 9341 539148 228177 4096 16 12354 15515 527964 507562 4096 32 30444 20680 425783 875014 4096 64 28757 36322 972933 530917 4096 128 34681 76206 951909 1409016 4096 256 26550 45967 519126 241739 4096 512 18686 53613 628314 1499272 8192 4 5430 6160 360532 247103 8192 8 8594 9428 337605 262882 8192 16 11649 28247 401099 408928 8192 32 16436 24842 873253 897266 8192 64 30813 22649 606271 986872 8192 128 25298 28213 317127 604044 8192 256 27591 28198 517335 937642 8192 512 42599 55389 1294551 590588 16384 4 4858 4868 186893 226604 16384 8 8382 9783 396823 167836 16384 16 14243 17403 938972 424994 16384 32 23018 25416 538487 328757 16384 64 25599 38244 448201 616822 16384 128 25397 35460 634055 523167 16384 256 31761 45682 562947 1042312 16384 512 29329 64038 760778 622798 32768 4 4819 5482 350925 311024 32768 8 9401 11690 482606 305318 32768 16 19620 17460 488943 480841 32768 32 21510 25667 361151 502352 32768 64 22015 30127