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: Mon Jul 28 18:51:29 2025 Auto Mode Machine = Linux oleg155-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-oleg155-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 3518 14817 140630 293755 64 8 3774 24286 296349 361867 64 16 6367 46718 519412 695778 64 32 6248 63809 1013707 998622 64 64 6194 32471 1033216 1484662 128 4 4004 16255 63147 154771 128 8 7515 22198 78480 398921 128 16 4886 42357 662962 518312 128 32 5743 72522 914904 722760 128 64 8029 18401 1057236 800337 128 128 7945 97936 962469 1802755 256 4 4276 4440 263378 148147 256 8 4151 9331 378770 264155 256 16 5159 12115 135388 100945 256 32 7844 21993 723153 625794 256 64 15908 85962 1128110 996229 256 128 13609 18542 152481 1112909 256 256 11016 106937 1619994 1235882 512 4 10766 13910 97934 145367 512 8 15404 8796 429857 438368 512 16 9054 19861 650593 247954 512 32 12176 39263 740050 115625 512 64 24901 95097 1221684 801059 512 128 18009 43467 1547395 1145443 512 256 17147 86210 1471074 740050 512 512 20606 77423 1518938 2097550 1024 4 6695 4534 88697 84370 1024 8 8327 27730 195565 349133 1024 16 9151 11542 568207 556501 1024 32 31791 67448 931096 799985 1024 64 34175 98860 1159922 1115632 1024 128 30568 21705 1250061 902340 1024 256 18609 101215 1607514 669226 1024 512 24314 60299 1535119 1486247 2048 4 7074 15471 206370 118662 2048 8 11739 16842 411320 188096 2048 16 12843 14163 336453 546266 2048 32 31242 37647 888141 734320 2048 64 19387 18920 914230 897045 2048 128 21753 33305 1270548 1104700 2048 256 22931 89257 1328106 627652 2048 512 48649 97380 1399968 1346636 4096 4 5771 9026 186862 191151 4096 8 19346 13954 351198 356238 4096 16 34160 34268 332062 480182 4096 32 45087 62895 704502 733655 4096 64 37373 36961 378629 1085629 4096 128 46257 41401 1164989 380070 4096 256 46425 43437 1536962 762878 4096 512 36536 33074 1490039 1327265 8192 4 5300 8754 52539 116236 8192 8 11048 10584 161478 309938 8192 16 27227 18123 167769 293723 8192 32 33679 35203 809973 659043 8192 64 24138 41368 1086308 843829 8192 128 22890 27513 852878 585606 8192 256 25032 31100 235883 889461 8192 512 27035 28566 446869 918395 16384 4 6164 6635 115477 117809 16384 8 11041 14108 367692 324853 16384 16 18385 30241 293383 370753 16384 32 22661 29987 576293 748294 16384 64 43787 40088 770649 469456 16384 128 35637 54991 709664 1121734 16384 256 41830 33211 1395806 620649 16384 512 29673 68660 884661 1215890 32768 4 8040 8130 131373 113494 32768 8 11692 13466 198357 373275 32768 16 22868 27240 623346 504147 32768 32 26408 28449 820022 814922 32768 64 24729 54150 761600 480934 32768 128 42600 52817 1351032 1011013 32768 256 48339 67150 585415 564821 32768 512 44402 69971 731736 755197 65536 4