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 Jul 28 02:35:50 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 4506 7403 576282 307907 64 8 3795 15571 666414 484710 64 16 5325 12668 1143223 955947 64 32 5217 25651 889431 769584 64 64 1980 57557 1679761 1722886 128 4 3369 4722 581781 12800 128 8 4813 12409 935631 290859 128 16 6812 36739 1185654 157819 128 32 9990 31542 1172704 319222 128 64 7186 31119 1349580 1121270 128 128 11164 96736 640042 1802755 256 4 6625 4985 232522 504861 256 8 10030 21578 888266 677095 256 16 6240 17874 995306 691930 256 32 6235 26183 1169901 1012194 256 64 12356 39137 135439 238354 256 128 21537 43873 1071806 624339 256 256 16715 95487 1707589 1570244 512 4 4814 3413 196084 555363 512 8 5082 8765 464139 232290 512 16 9261 17167 292899 536092 512 32 13411 30739 595397 585814 512 64 27177 31736 133187 736750 512 128 11497 55651 728255 609594 512 256 12130 42773 324648 1585086 512 512 23310 60549 1766304 1679288 1024 4 9568 8473 367411 205738 1024 8 9864 11374 199415 519292 1024 16 16600 24599 978172 824558 1024 32 16353 51963 1289467 893517 1024 64 28009 51903 189273 1082454 1024 128 22935 79446 412747 1400926 1024 256 28081 64646 456532 713117 1024 512 27395 79336 1262555 1607514 2048 4 7848 7315 398442 299459 2048 8 10406 11450 448050 267051 2048 16 14258 32661 348535 1054004 2048 32 20659 34831 748264 523910 2048 64 31511 40290 1456709 566364 2048 128 31345 52071 497108 780207 2048 256 35690 56109 952130 1245675 2048 512 24870 71106 1008349 1357275 4096 4 5248 9469 264070 332628 4096 8 10716 12284 367815 602278 4096 16 17022 22474 475280 414064 4096 32 24577 29534 1049164 662578 4096 64 18215 32255 580816 363635 4096 128 26800 1354 1606976 1593856 4096 256 28241 52337 492954 671802 4096 512 33381 48964 929203 648840 8192 4 4913 6238 368809 251651 8192 8 6861 12827 656361 296059 8192 16 15040 20547 557626 604171 8192 32 25265 29625 928370 499823 8192 64 21561 40287 650989 646056 8192 128 28145 30715 577845 420514 8192 256 24079 40400 782952 730579 8192 512 31256 40827 901716 495705 16384 4 8027 5437 345086 279714 16384 8 8711 10894 372778 387329 16384 16 12308 16976 320438 565397 16384 32 23523 26446 623131 625793 16384 64 27159 31408 901312 739851 16384 128 30279 43777 525616 454744 16384 256 30609 40517 708194 448543 16384 512 35674 48385 748506 360832 32768 4 5187 6072 281437 237566 32768 8 9883 10486 349123 233940 32768 16