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: Sun Nov 16 19:27:26 2025 Auto Mode Machine = Linux oleg159-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-oleg159-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 3134 13353 131663 197552 64 8 3665 31682 418250 511494 64 16 5147 40556 459802 557144 64 32 7655 64701 913649 720041 64 64 6350 79706 1255511 998622 128 4 6011 9080 235696 222232 128 8 8990 16368 387966 343091 128 16 10014 20715 643108 568836 128 32 14322 60378 895074 628061 128 64 12277 91494 803932 908709 128 128 8019 109502 774922 1561553 256 4 8721 12986 256274 186032 256 8 17559 24471 222962 215835 256 16 12441 36430 554101 510866 256 32 27030 85818 951219 338526 256 64 16640 105353 1108314 1076103 256 128 7389 90490 1122215 1339154 256 256 17413 122492 1775350 1718521 512 4 10061 9558 259113 247696 512 8 10595 5621 449564 475864 512 16 12514 52394 640885 577932 512 32 28420 70416 924521 888930 512 64 31748 39782 243015 1001715 512 128 16389 106888 1442420 1252318 512 256 18355 59355 1546280 1433753 512 512 36480 122841 1289930 1747618 1024 4 6918 6477 74121 124000 1024 8 15531 23249 200588 425589 1024 16 18855 53497 168948 560788 1024 32 40103 64540 823136 652650 1024 64 37358 98009 900449 905384 1024 128 31064 98443 1032492 1134192 1024 256 47745 116537 1418508 744774 1024 512 31618 130542 1466957 1556257 2048 4 8885 16285 239502 231492 2048 8 14929 17148 260129 161108 2048 16 17300 43369 664762 592417 2048 32 28724 40427 492915 641575 2048 64 26326 42508 1083109 400000 2048 128 38160 42770 1211077 480399 2048 256 29170 70728 1540020 1395873 2048 512 62249 89863 1543340 1135212 4096 4 11631 11243 199095 91139 4096 8 16766 19138 414704 373517 4096 16 33645 33135 547237 300663 4096 32 30394 52084 791195 697806 4096 64 35932 37481 621450 643927 4096 128 29935 80952 467316 1123689 4096 256 50830 66162 1108535 1398464 4096 512 43527 98053 690486 593211 8192 4 9338 10816 135779 187946 8192 8 13154 2952 239502 272857 8192 16 24107 28235 465164 424368 8192 32 34493 40417 347324 562133 8192 64 43621 61338 712535 485685 8192 128 47190 70321 865314 505589 8192 256 51356 76983 846720 805435 8192 512 54708 73969 439693 1188104 16384 4 11679 12162 235081 167501 16384 8 20229 20608 426231 320094 16384 16 31866 42361 399047 442318 16384 32 56556 56662 943290 571149 16384 64 57783 62268 743139 614066 16384 128 47584 56700 866556 539925 16384 256 43518 68836 1361703 777890 16384 512 57449 79458 1238126 718471 32768 4 13085 13716 200254 167165 32768 8 22765 21889 293045 327833 32768 16 22908 29718 449185 297980 32768 32 32883 47610 619491 410656 32768 64 43456 63997 652294 643128 32768 128 50913 80354 785747 1060659 32768 256 51057 85687 1130470 662689 32768 512 49630 67809 862065 895573 65536 4 11766 14065 183206 181459 65536 8 18393 19845 266447 257116 65536 16