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 Aug 27 08:50:16 2026 Auto Mode Machine = Linux oleg437-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-oleg437-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 4040 13915 639427 548044 64 8 6112 19190 889431 659861 64 16 6565 20963 1163036 886494 64 32 3630 9683 555990 799377 64 64 7737 10120 198869 1690338 128 4 6187 12833 646983 561107 128 8 5435 21574 927549 280086 128 16 11293 26890 1142750 586868 128 32 8044 19732 1359835 881842 128 64 8552 28951 1377278 1278855 128 128 4717 121441 1508887 2058509 256 4 10328 7504 518263 585845 256 8 7383 11658 977189 775373 256 16 6629 27190 651619 1003679 256 32 13416 50266 1008392 113577 256 64 18039 113373 1153561 1248819 256 128 19220 127434 1570244 1400278 256 256 14536 44654 639967 1938842 512 4 7274 5481 643960 290404 512 8 13129 22065 883081 721163 512 16 19741 45911 986529 953248 512 32 18705 29670 1258188 980673 512 64 28547 47690 1306409 1306409 512 128 10423 49688 1434711 839252 512 256 26944 114338 977103 1797349 512 512 38326 123377 1657257 1062161 1024 4 7237 7375 184699 548470 1024 8 7815 11131 918354 800582 1024 16 10962 22276 534678 517977 1024 32 22258 33053 240038 1004951 1024 64 42800 81295 1019987 906148 1024 128 16648 90435 1570483 1161176 1024 256 39875 63085 1612342 432445 1024 512 25944 114249 743742 481887 2048 4 8444 5071 340602 224463 2048 8 5979 11263 218802 367361 2048 16 15958 26103 196544 234487 2048 32 25881 31786 1303518 1158953 2048 64 14700 38091 1469167 611696 2048 128 46621 35897 1529599 523399 2048 256 38281 69409 1640927 837649 2048 512 34042 59204 784697 851179 4096 4 5726 8650 160382 178172 4096 8 8727 10005 530508 313410 4096 16 19161 22085 228289 735792 4096 32 15488 47699 416685 432526 4096 64 22355 34204 1046480 526411 4096 128 34584 46014 224994 467202 4096 256 33441 48353 1494836 768921 4096 512 25921 55334 622598 409641 8192 4 5223 6241 200853 232786 8192 8 10638 13690 627497 294941 8192 16 13328 18414 464453 315366 8192 32 21428 27117 553780 580913 8192 64 22409 27747 480778 473745 8192 128 24026 33504 1205613 505366 8192 256 23233 38601 395631 571987 8192 512 24452 66232 979082 841412 16384 4 6060 6485 350955 157043 16384 8 9855 9880 606185 578613 16384 16 17429 18240 828556 581570 16384 32 26807 31907 859113 468034 16384 64 25896 29270 781562 382516 16384 128 21416 34997 599485 536951 16384 256 27929 39149 662383 658732 16384 512 46443 51635 969877 388540 32768 4 5807 7452 466575 231360 32768 8 11538 12976 477681 342038 32768 16 15229 15106 499740 298492 32768 32