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 Jan 9 20:31:16 2026 Auto Mode Machine = Linux oleg257-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-oleg257-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 4266 9174 222250 195111 64 8 4554 32653 418903 415659 64 16 7124 45071 470274 293434 64 32 8571 52584 614542 901377 64 64 7034 101265 1119387 1083249 128 4 12102 18604 428193 294207 128 8 16926 36477 535903 719853 128 16 17625 59206 800337 544601 128 32 14421 72689 992724 770474 128 64 13800 93161 586868 1074159 128 128 22064 99002 1504659 1487977 256 4 13928 18710 244989 303676 256 8 8431 16864 427478 408297 256 16 19253 33181 661657 615393 256 32 24965 80455 1652404 762164 256 64 19774 89197 944525 831194 256 128 38203 105789 1561112 1208072 256 256 27965 123677 1361224 1790149 512 4 12807 17372 266113 325681 512 8 25385 27988 447970 397549 512 16 34222 58393 639169 690996 512 32 37048 66935 1147892 792486 512 64 43269 97916 1239310 1060063 512 128 32028 107000 1049187 1322500 512 256 50562 153240 2327124 1827947 512 512 49844 116018 1216149 1990612 1024 4 18462 17919 359658 232514 1024 8 32528 34405 504648 518978 1024 16 40061 55231 726752 638770 1024 32 47640 80929 1172909 1013010 1024 64 68426 102359 1430318 1037480 1024 128 50173 125801 1462960 1256277 1024 256 64686 137929 1928757 1247519 1024 512 71136 137281 1594978 1831694 2048 4 17412 19968 214294 322920 2048 8 28231 34511 593440 454210 2048 16 32478 44221 332906 350155 2048 32 47962 66349 913841 835856 2048 64 60627 109618 1115459 1071090 2048 128 65071 108326 1701042 1306095 2048 256 55206 134941 1444219 1386411 2048 512 43449 143505 1719773 1412630 4096 4 16784 20201 302890 277131 4096 8 29526 32137 417526 370776 4096 16 40176 50132 640709 423798 4096 32 42837 73900 748388 904784 4096 64 58055 84614 1109466 682775 4096 128 64734 128854 1652894 1258063 4096 256 66991 132573 1560415 1135573 4096 512 67598 130259 1880704 1572268 8192 4 16788 18067 356374 276896 8192 8 29845 33070 503965 484589 8192 16 46907 57088 815762 703231 8192 32 62390 75666 1091658 997096 8192 64 82509 99457 1166444 985315 8192 128 74656 107743 899709 778553 8192 256 71585 118130 1316828 828388 8192 512 91408 121738 1095172 1568450 16384 4 16576 16045 238541 282887 16384 8 27761 29305 484903 493019 16384 16 27822 41824 524152 541922 16384 32 61495 57071 1190528 953552 16384 64 69035 77250 1217420 1159102 16384 128 70530 103698 1732286 1463773 16384 256 81237 108583 1098056 1295181 16384 512 94365 125387 2010822 1424066 32768 4 17043 18943 319442 296377 32768 8 29461 31096 520291 426971 32768 16 46050 51784 731494 710371 32768 32 61698 74761 1098713 622231