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 Oct 14 10:32:12 2025 Auto Mode Machine = Linux oleg343-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-oleg343-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 16112 24892 634890 438759 64 8 20291 39628 1033216 809014 64 16 23676 56790 1049372 586352 64 32 30650 90632 1304314 987600 64 64 31790 111671 1204796 1879725 128 4 19659 26196 640042 496272 128 8 29130 39987 767171 1294270 128 16 36572 70838 914904 883293 128 32 32208 109861 1183041 1243315 128 64 47302 123310 1852520 1266785 128 128 35397 138697 1121270 1561553 256 4 20727 24688 691930 552960 256 8 36198 38811 1206714 817898 256 16 36570 62928 1173737 839644 256 32 60493 96094 1570244 761623 256 64 42447 155528 1415041 1224606 256 128 52652 169418 1707589 1479379 256 256 72360 166347 1461259 1572543 512 4 21333 24809 555363 643381 512 8 31665 41686 843537 911184 512 16 48794 63405 1333173 988345 512 32 68374 98917 1296159 1086890 512 64 72759 173089 1975959 1589779 512 128 84824 161515 2141475 1316016 512 256 117382 241975 2169601 1566585 512 512 85062 186935 2532990 2057359 1024 4 24229 26007 864038 915809 1024 8 42122 48514 879070 1151834 1024 16 64080 87312 1512415 1580306 1024 32 92518 145435 1935711 1298041 1024 64 121743 184271 2056183 2115949 1024 128 107492 219794 1537317 1544504 1024 256 140217 251788 1950656 1917562 1024 512 157608 240482 1738286 1653942 2048 4 27497 28407 687920 724962 2048 8 45288 48445 1337619 1325646 2048 16 61234 86849 1809243 1235996 2048 32 85967 109788 1935626 1670281 2048 64 122811 153903 1793378 1409617 2048 128 119899 180677 2204918 2024111 2048 256 139701 214674 1725300 1982533 2048 512 138051 162255 2231264 2243502 4096 4 25849 26911 724956 752387 4096 8 42940 52986 1275624 1185815 4096 16 61902 70883 1492240 1577175 4096 32 88004 100836 1793342 1542759 4096 64 109043 156240 1337183 1196969 4096 128 110463 184597 1864376 1356290 4096 256 104316 191992 1761711 1625372 4096 512 126873 202052 1711516 1520368 8192 4 23876 28432 984609 823563 8192 8 42556 50177 1164468 815123 8192 16 66078 81913 1511992 657190 8192 32 81563 123578 1876780 1366257 8192 64 100953 166243 1726116 1425194 8192 128 143186 195204 1801220 2033745 8192 256 129538 223245 2187430 1871159 8192 512 126568 218377 2351988 2065036 16384 4 23715 27132 853458 803371 16384 8 48051 52174 848034 1116757 16384 16 60688 76145 1498174 1250495 16384 32 82779 100394 1882993 1388726 16384 64 107636 154199 1664885 1301140 16384 128 125792 182869 1956994 1392130 16384 256 137666 212371 2204822 1779338 16384 512 152703 236831 2280250 1977322 32768 4 26363 28604 975963 631526 32768 8 41915 44981 1051570 914925 32768 16 58783 73201 1399271 1109731 32768 32 89186 90678 1442704 1309980 32768 64 106884 131204 1808768 1441614 32768 128 112097 171000 1706133 1371334 32768 256 119061 179486 1760958 1580470 32768 512 123075 194848 1823068 1541161 65536 4 23111 24844 711457 714849 65536 8 37609 43793 982504 844144 65536 16 59878 72970 1406414 1118932 65536 32 82472 99509 1593155 1312349 65536 64 103695 147204 1368553 1461294 65536 128 117698 161379 1881877 1643654 65536 256 129882 174923 2029415 1699895 65536 512 134878 156625 2155722 1627895 iozone test complete. Excel output is below: "Writer report" "4" "8" "16" "32" "64" "128" "256" "512" "64" 16112 20291 23676 30650 31790 "128" 19659 29130 36572 32208 47302 35397 "256" 20727 36198 36570 60493 42447 52652 72360 "512" 21333 31665 48794 68374 72759 84824 117382 85062 "1024" 24229 42122 64080 92518 121743 107492 140217 157608 "2048" 27497 45288 61234 85967 122811 119899 139701 138051 "4096" 25849 42940 61902 88004 109043 110463 104316 126873 "8192" 23876 42556 66078 81563 100953 143186 129538 126568 "16384" 23715 48051 60688 82779 107636 125792 137666 152703 "32768" 26363 41915 58783 89186 106884 112097 119061 123075 "65536" 23111 37609 59878 82472 103695 117698 129882 134878 "Re-writer report" "4" "8" "16" "32" "64" "128" "256" "512" "64" 24892 39628 56790 90632 111671 "128" 26196 39987 70838 109861 123310 138697 "256" 24688 38811 62928 96094 155528 169418 166347 "512" 24809 41686 63405 98917 173089 161515 241975 186935 "1024" 26007 48514 87312 145435 184271 219794 251788 240482 "2048" 28407 48445 86849 109788 153903 180677 214674 162255 "4096" 26911 52986 70883 100836 156240 184597 191992 202052 "8192" 28432 50177 81913 123578 166243 195204 223245 218377 "16384" 27132 52174 76145 100394 154199 182869 212371 236831 "32768" 28604 44981 73201 90678 131204 171000 179486 194848 "65536" 24844 43793 72970 99509 147204 161379 174923 156625 "Reader report" "4" "8" "16" "32" "64" "128" "256" "512" "64" 634890 1033216 1049372 1304314 1204796 "128" 640042 767171 914904 1183041 1852520 1121270 "256" 691930 1206714 1173737 1570244 1415041 1707589 1461259 "512" 555363 843537 1333173 1296159 1975959 2141475 2169601 2532990 "1024" 864038 879070 1512415 1935711 2056183 1537317 1950656 1738286 "2048" 687920 1337619 1809243 1935626 1793378 2204918 1725300 2231264 "4096" 724956 1275624 1492240 1793342 1337183 1864376 1761711 1711516 "8192" 984609 1164468 1511992 1876780 1726116 1801220 2187430 2351988 "16384" 853458 848034 1498174 1882993 1664885 1956994 2204822 2280250 "32768" 975963 1051570 1399271 1442704 1808768 1706133 1760958 1823068 "65536" 711457 982504 1406414 1593155 1368553 1881877 2029415 2155722 "Re-Reader report" "4" "8" "16" "32" "64" "128" "256" "512" "64" 438759 809014 586352 987600 1879725 "128" 496272 1294270 883293 1243315 1266785 1561553 "256" 552960 817898 839644 761623 1224606 1479379 1572543 "512" 643381 911184 988345 1086890 1589779 1316016 1566585 2057359 "1024" 915809 1151834 1580306 1298041 2115949 1544504 1917562 1653942 "2048" 724962 1325646 1235996 1670281 1409617 2024111 1982533 2243502 "4096" 752387 1185815 1577175 1542759 1196969 1356290 1625372 1520368 "8192" 823563 815123 657190 1366257 1425194 2033745 1871159 2065036 "16384" 803371 1116757 1250495 1388726 1301140 1392130 1779338 1977322 "32768" 631526 914925 1109731 1309980 1441614 1371334 1580470 1541161 "65536" 714849 844144 1118932 1312349 1461294 1643654 1699895 1627895