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: Thu Apr 30 14:22:28 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 3403 7779 674790 542506 64 8 4604 19869 710511 1232453 64 16 3557 25059 1029254 645579 64 32 5114 39165 1255511 1304314 64 64 7277 75747 955947 1562436 128 4 5932 12790 537512 460514 128 8 6533 15630 677178 628061 128 16 8997 29519 1022989 1065630 128 32 11238 59199 1266785 1057236 128 64 13258 70245 1206978 953918 128 128 10887 71872 1451764 1852520 256 4 8741 15101 417505 368375 256 8 13870 28773 810490 98618 256 16 14174 25969 1138879 1471270 256 32 15312 47328 509895 1023775 256 64 15251 66494 1057034 1137672 256 128 19797 85619 1802167 1384034 256 256 11548 65222 1272498 1729594 512 4 12123 13910 620515 387226 512 8 11619 19851 659788 605982 512 16 15724 41423 1261144 716112 512 32 18066 64265 1190529 1096322 512 64 27942 58748 1150351 1143004 512 128 29689 100987 1267097 1216149 512 256 24604 115837 917804 1533034 512 512 27136 112949 1213400 2116152 1024 4 9940 10730 438897 265912 1024 8 15933 24773 779230 661089 1024 16 19276 31465 794510 878890 1024 32 35637 58404 881234 790707 1024 64 31538 90611 714541 1261072 1024 128 30403 67698 866478 1239598 1024 256 33844 55020 1044037 766574 1024 512 41041 91747 976172 1712639 2048 4 12246 15221 532088 552307 2048 8 21085 24971 869267 724656 2048 16 27329 42441 707409 668435 2048 32 33392 60017 1108263 541377 2048 64 44002 96158 1307685 642007 2048 128 39139 94104 1846977 1330781 2048 256