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 Oct 23 09:15:11 2025 Auto Mode Machine = Linux oleg153-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-oleg153-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 7674 19405 581273 516414 64 8 4329 30373 746056 420873 64 16 11086 57140 727850 771797 64 32 3976 5016 1087638 987600 64 64 3607 96670 1392258 1599680 128 4 4069 8026 584313 576780 128 8 6775 32561 761728 711270 128 16 19968 29419 1017175 907174 128 32 10969 93567 1196221 1114289 128 64 19198 106483 1332828 1306873 128 128 16729 126985 921183 1231904 256 4 15475 4771 573946 435276 256 8 25206 34014 328280 709299 256 16 11364 59412 995306 626159 256 32 8628 28262 1213534 794889 256 64 17060 85191 911645 958864 256 128 32561 137786 1561112 1089202 256 256 29290 75916 1619994 2097948 512 4 11805 8581 660600 354850 512 8 11382 7464 803757 225272 512 16 38778 41751 1032540 883081 512 32 45141 76133 1096322 793951 512 64 46272 32138 1196499 1143004 512 128 16300 37976 1361920 1179413 512 256 23853 132398 1570020 935801 512 512 59868 132333 1524329 2152206 1024 4 10486 9070 582146 486472 1024 8 21152 28937 1007781 846998 1024 16 44048 33247 737738 944819 1024 32 29816 38431 1161176 929283 1024 64 39219 108300 1452570 885048 1024 128 31058 90974 1448650 1499217 1024 256 33376 115602 1653942 1554004 1024 512 62424 127176 1662264 1612342 2048 4 11619 11691 620803 580840 2048 8 17032 19257 874399 792224 2048 16 26959 34905 945527 264470 2048 32 36458 36597 1292923 823200 2048 64 44004 46023 1244231 568087 2048 128 34208 123978 1249480 1281543 2048 256 43583 93876 1662201 1280015 2048 512 44122 42670 1650385 1558743 4096 4 9505 13711 515156 499141 4096 8 20540 13184 484092 746632 4096 16 21770 30834 1006153 868512 4096 32 22491 51580 1212599 778256 4096 64 33249 65590 1325524 1115155 4096 128 36202 79083 1394605 1066092 4096 256 66077 121890 1381928 1256039 4096 512 63975 77952 1453481 1336766 8192 4 10109 12528 452120 337366 8192 8 2601 26533 840897 568175 8192 16 24076 23002 593752 904589 8192 32 26335 62582 834808 875210 8192 64 39017 51507 311944 334232 8192 128 45431 51801 688119 438901 8192 256 38757 99376 1039320 1245017 8192 512 59752 111236 1165969 1182095 16384 4 9756 15310 616678 543899 16384 8 19277 21093 709078 467365 16384 16 27702 38466 1116685 922114 16384 32 38269 47617 705902 1133614 16384 64 34224 58991 757850 642029 16384 128 61106 64149 1141807 477318 16384 256 42791 64078 786517 1128439 16384 512 59375 94890 906197 769993 32768 4 8429 8826 316033 299568 32768 8 15980 17505 266697 301753 32768 16 27179 32569 545605 733344 32768 32 33407 55665 609888 596604 32768 64 46473 49562 627329 902453 32768 128 51125 65646 1202137 867589 32768 256 57865 76412 1152500 857847 32768 512 44120 59177 1616742 1141815 65536 4