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: Tue Aug 25 07:57:20 2026 Auto Mode Machine = Linux oleg228-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-oleg228-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 3503 8419 614542 201255 64 8 4617 9338 842003 735831 64 16 3660 25087 1138375 155722 64 32 3184 53115 1232453 926260 64 64 4695 65363 496362 1722886 128 4 5918 9752 603357 559353 128 8 7201 20320 785122 757430 128 16 10040 40403 1059322 889145 128 32 9900 52286 1085013 883293 128 64 12260 93080 1359835 1165070 128 128 13479 69490 1377278 2004703 256 4 6681 6886 575484 329388 256 8 11791 9117 461267 686182 256 16 8360 18658 768712 828628 256 32 5869 38724 518263 1190657 256 64 21744 70212 1332507 664935 256 128 24750 161907 463858 1447470 256 256 6282 78790 682691 1952947 512 4 5831 4967 648824 432454 512 8 5116 8251 782951 439805 512 16 16950 31738 800163 481627 512 32 24539 41387 922535 782951 512 64 32382 62898 1306409 1080328 512 128 8146 75316 1459080 1380303 512 256 15861 35704 169362 657969 512 512 38106 101469 1475116 1071167 1024 4 10093 11632 925877 681329 1024 8 12151 20350 427921 572982 1024 16 20959 33572 1313122 1017811 1024 32 29041 44307 864212 782210 1024 64 27268 66294 1162433 1187831 1024 128 35319 83226 994250 1140517 1024 256 43356 104651 1256277 1424152 1024 512 32148 88321 1617808 727244 2048 4 8423 7989 413916 307962 2048 8 12925 13242 234372 445401 2048 16 17819 25322 728034 609137 2048 32 29263 37532 854056 687920 2048 64 27656 46071 1177057 1241893 2048 128 43492 35927 1618968 797224 2048 256 30160 40507 1606254 861594 2048 512 17789 60286 383945 430706 4096 4 5736 4532 296231 242182 4096 8 7624 10908 218490 236367 4096 16 10539 17119 381980 219602 4096 32 11735 13839 475280 421966 4096 64 13438 17317 209708 218674 4096 128 18744 30576 338067 589769 4096 256 28703 43579 460539 599985 4096 512 45660 32273 259915 493677 8192 4 5707 5776 368612 308818 8192 8 10849 10074 481257 285304 8192 16 9104 18195 787240 599962 8192 32 19692 23880 363861 415209 8192 64 15751 26020 757125 350292 8192 128 29451 43882 429395 493789 8192 256 29679 26719 575397 311959 8192 512 33887 43119 1036968 682840 16384 4 5722 9266 163903 166238 16384 8 7428 13281 690198 432868 16384 16 18587 18408 402141 457691 16384 32 23403 28427 812663 733486 16384 64 31701 37544 605715 674184 16384 128 20636 29160 541832 369025 16384 256 36627 49591 1170533 997498 16384 512 34189 43341 862174 530759 32768 4 5810 6447 402412 135290 32768 8 10559 11246 376004 511633 32768 16 16100 25216 749031 336707 32768 32