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 Apr 10 10:50:50 2026 Auto Mode Machine = Linux oleg422-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-oleg422-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 5094 17385 1105556 331481 64 8 5418 23289 679917 760859 64 16 8358 35433 542506 673098 64 32 6769 70256 1204796 1033216 64 64 6625 75470 1255511 1679761 128 4 8213 16283 513847 669577 128 8 12933 29171 940549 606767 128 16 15717 47111 1076312 1727352 128 32 10055 66151 1206978 1102844 128 64 12341 78194 1000121 1152564 128 128 11199 101741 1278855 2727923 256 4 9794 12058 876662 259620 256 8 17953 29561 731528 587127 256 16 16388 45214 1763685 873809 256 32 17721 69002 1839210 992545 256 64 15778 84488 548161 1219045 256 128 30769 110960 1629830 1506359 256 256 28212 108198 2345409 1855098 512 4 12281 14099 618371 557816 512 8 13998 26151 1069035 943200 512 16 22245 53461 850554 971797 512 32 27044 69800 1329871 312188 512 64 24845 67716 1729323 1383861 512 128 31712 102564 1475116 1264113 512 256 27605 98158 2014892 888930 512 512 31094 117055 817837 2105777 1024 4 9961 15708 680357 439301 1024 8 20331 29542 834491 821876 1024 16 30847 48311 906913 805084 1024 32 33044 71824 2028027 673635 1024 64 39839 90173 1400926 970437 1024 128 49600 96731 1558516 1241389 1024 256 49316 79918 2150918 1605111 1024 512 40999 119781 1530742 1396825 2048 4 13284 16221 704277 649974 2048 8 25139 28942 602176 622874 2048 16 35683 38971 849411 899393 2048 32 35916 74402 1275264 1177057 2048 64 58038 81577 1943069 1191423 2048 128 72539 121185 1646273 1327285 2048 256 73767 126661 1060642 1474462 2048 512 78651 124445 2519185 1470424 4096 4 15604 18063 713959 702457 4096 8 24830 28607 1116097 1003977 4096 16 39870 48037 1351382 941837 4096 32 55964 68233 1357576 1175350 4096 64 61842 92169 1687807 1367627 4096 128 75237 95605 1639018 685746 4096 256 68014 112105 1322056 1511539 4096 512 81103 126357 1855116 800299 8192 4 15430 16802 499358 674966 8192 8 21924 24336 1151357 577059 8192 16 35679 46983 1282615 1160339 8192 32 55252 66648 1422716 1420774 8192 64 66483 96449 1634092 1198213 8192 128 65882 117547 1479250 1238420 8192 256 78094 105688 983792 1615119 8192 512 90369 127100 2195116 1547749 16384 4 15264 16339 627960 533557 16384 8 24245 28282 1056689 885094 16384 16 38442 41958 1397964 845270 16384 32 51193 67041 1350464 1224055 16384 64 66433 80898 1556365 1514351 16384 128 66617 106059 1530370 1469815 16384 256