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 12 19:09:51 2025 Auto Mode Machine = Linux oleg351-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-oleg351-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 7415 17462 208444 246089 64 8 11636 32083 426219 336889 64 16 11542 43451 577521 450541 64 32 12195 56838 780776 789967 64 64 14742 68013 710511 743988 128 4 10305 18295 249962 227313 128 8 14502 31107 444501 337908 128 16 19811 46681 747933 571257 128 32 20809 54538 955616 703810 128 64 23071 86903 700139 983630 128 128 21107 109324 1254941 814915 256 4 13539 16881 289277 218426 256 8 20215 32603 450620 382140 256 16 25452 53287 746272 523570 256 32 30044 82634 337251 773140 256 64 37904 81555 868157 937924 256 128 39162 85900 1173737 1286217 256 256 35540 99073 1445521 1924938 512 4 15391 19118 265291 246615 512 8 26071 33977 445646 466661 512 16 31616 51435 597385 881269 512 32 37646 68267 670919 799865 512 64 48183 97653 857345 1003588 512 128 58883 106687 1537424 1368865 512 256 53339 128316 1273106 1718254 512 512 51072 128033 1977778 2237414 1024 4 16466 19253 263854 274600 1024 8 28085 34573 505420 448710 1024 16 40725 53572 680897 599872 1024 32 56989 81971 903099 838728 1024 64 59201 89408 1281771 949834 1024 128 74898 130594 1356245 1137798 1024 256 79930 143943 1837965 1503942 1024 512 80346 132885 1720874 1590254 2048 4 17181 20323 308992 326690 2048 8 29070 33679 430059 463149 2048 16 47852 55519 688196 636630 2048 32 57481 77802 882394 894709 2048 64 77646 101216 1312882 1201926 2048 128 76216 123045 1674514 1455722 2048 256 83752 117578 1530689 1473451 2048 512 78911 129685 1508115 1497076 4096 4 16777 18967 303002 273469 4096 8 28918 32663 472483 429896 4096 16 46703 60657 945517 618074 4096 32 62291 86398 1306473 885614 4096 64 71213 113343 1212599 1115155 4096 128 82869 126318 1612708 1229257 4096 256 103914 114528 1502024 1315375 4096 512 94663 141265 1947653 1450413 8192 4 18179 19382 308190 332669 8192 8 31746 36091 507343 497572 8192 16 50150 58228 826137 655197 8192 32 69133 78585 1130075 905996 8192 64 73817 101265 1399821 1226003 8192 128 96607 122088 1450463 1291923 8192 256 95541 148947 1753870 1345814 8192 512 98225 138371 1801220 1395557 16384 4 18761 19551 317660 304738 16384 8 31021 35735 498538 445279 16384 16 47552 57216 785987 796998 16384 32 63087 84177 1041175 948642 16384 64 74767 101720 1309570 1225059 16384 128 80215 116520 1641344 1249744 16384 256 97027 118897 1683854 1265743 16384 512 91615 129091 1630749 1477494 32768 4 17744 19591 310588 300872 32768 8 29706 34574 546134 469192 32768 16 50166 58062 829735 682777 32768 32 66000 80828 1095185 1032686 32768 64 80250 110276 1307065 1079817 32768 128 89744 120741 1715610 1449643 32768 256 93555 128521 1570842 1497959 32768 512 100741 135735 1741126 1562608 65536 4