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 Sep 1 19:49:33 2026 Auto Mode Machine = Linux oleg147-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-oleg147-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 2588 5298 576282 608965 64 8 2445 8901 712397 598110 64 16 2318 12020 877797 467002 64 32 4854 60611 1029254 901377 64 64 8090 62809 1484662 1188789 128 4 7813 4356 210223 504196 128 8 9259 16264 740710 212975 128 16 5407 16913 1048974 643880 128 32 5740 42967 540217 1162547 128 64 12658 85274 1243315 337695 128 128 14255 89765 1281909 1939522 256 4 3698 9462 311789 306188 256 8 11644 25261 870974 664935 256 16 11286 24897 996229 166994 256 32 10876 45390 1066483 390905 256 64 12755 50067 484801 1286217 256 128 28299 85388 1479379 1642294 256 256 16878 78119 1729594 1523457 512 4 8980 13447 632765 548274 512 8 12312 25489 245909 740050 512 16 10362 36629 1017858 977103 512 32 12296 46503 1803387 1130370 512 64 15954 65716 1652157 885631 512 128 22164 70757 1795846 1252318 512 256 24098 149485 1789859 1827947 512 512 13187 104323 1882427 2089386 1024 4 10712 7484 189985 504708 1024 8 19180 13019 257279 763576 1024 16 14577 18684 1029275 256311 1024 32 33666 51125 949834 1064479 1024 64 40241 30817 1932227 1091532 1024 128 55082 81625 1286763 471207 1024 256 45341 81355 1150600 1014925 1024 512 48327 55959 1537868 1414770 2048 4 7610 7571 134067 341673 2048 8 15088 16832 399777 229697 2048 16 13622 22979 1003871 874488 2048 32 18924 32114 857295 443378 2048 64 33074 40234 699916 621521 2048 128 33284 38364 898640 638808 2048 256 24204 32457 406435 498319 2048 512 39643 57786 902986 658747 4096 4 5883 7590 429166 161667 4096 8 13000 13987 269332 276832 4096 16 22995 30625 279858 702572 4096 32 26860 32410 1517682 729853 4096 64 21859 29029 752123 384132 4096 128 34597 41987 286174 465354 4096 256 30684 47891 375501 720607 4096 512 28702 1697 1945007 1443710 8192 4 5385 4416 396169 181278 8192 8 13154 13466 389611 275917 8192 16 14370 24941 740482 506871 8192 32 23003 29998 807480 762841 8192 64 31634 42723 408680 913560 8192 128 37194 35399 643322 914800 8192 256 36281 38039 1174338 729214 8192 512 35303 52787 864682 834484 16384 4 7233 7563 237979 200696 16384 8 14450 14739 213867 253308 16384 16 17620 20933 679101 652645 16384 32 24310 37072 685407 438637 16384 64 32840 40796 801292 889712 16384 128 32670 36837 945197 602555 16384 256 42064 54797 1256830 985864 16384 512 48197 56141 943666 731433 32768 4 5764 6763 374435 241465 32768 8 11715 15486 897802 411204 32768 16 19790 21763 438644 357967 32768 32 25372 31770 796984 404848 32768 64 27479 32540 799901 647015 32768 128