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 19 17:01:23 2025 Auto Mode Machine = Linux oleg301-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-oleg301-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 12841 26734 237174 300665 64 8 19323 47868 566551 503814 64 16 30696 75301 640954 939223 64 32 35936 104376 955947 1336792 64 64 37403 145115 1599680 735831 128 4 16098 25559 246632 243832 128 8 31551 32388 731625 643108 128 16 40958 83770 1114289 948860 128 32 41666 115959 1217930 707520 128 64 50673 100072 1598754 1024942 128 128 68558 185012 1727352 2464907 256 4 19954 25293 355096 408297 256 8 34632 52426 619655 680960 256 16 36121 73144 880256 914752 256 32 64451 111155 927393 1312954 256 64 60377 170874 1855098 1868008 256 128 90360 192917 1445521 1523457 256 256 70856 233381 1376935 2350543 512 4 21498 29273 443254 428057 512 8 29976 31523 398434 604447 512 16 55279 67412 637650 535558 512 32 69162 107833 605982 696600 512 64 78902 168922 1635797 1040545 512 128 86911 127169 1677976 1089647 512 256 85120 225343 2287463 2357784 512 512 103354 228072 1413929 2152206 1024 4 20838 27171 232829 372090 1024 8 43760 37540 478238 369116 1024 16 59618 65389 1087111 863343 1024 32 58894 91739 1274922 1167489 1024 64 102687 105915 1101046 1004951 1024 128 114310 125967 1251518 1768345 1024 256 93609 145474 1442326 1352828 1024 512 105610 152067 2259550 1416636 2048 4 23442 24048 297540 234538 2048 8 35833 47091 742315 547869 2048 16 54323 83394 1197736 1054134 2048 32 81009 129834 1529327 1379952 2048 64 107484 160626 1094565 1513696 2048 128 131942 153559 1284033 1306890 2048 256 139442 227326 2197023 1209712 2048 512 126522 197071 2420514 2273187 4096 4 20219 23169 366599 357632 4096 8 36898 44474 750743 630342 4096 16 63273 75755 1091699 839524 4096 32 67246 103964 913686 1369808 4096 64 99519 144749 1878853 1644351 4096 128 127612 188384 1946770 1075367 4096 256 114666 202230 2216240 1759366 4096 512 151709 229816 2340643 2227447 8192 4 24020 24623 393204 227536 8192 8 37444 43741 762333 421396 8192 16 62468 67751 877468 601601 8192 32 98308 125103 873919 992832 8192 64 121438 142812 1793698 973286 8192 128 95303 189003 1939824 1645281 8192 256 147760 192301 1416031 1910062 8192 512 140964 188816 2365590 2080793 16384 4 21317 24120 447576 421411 16384 8 37795 46094 623250 429948 16384 16 55861 67473 719727 897416 16384 32 81326 118257 1093357 917362 16384 64 94439 115400 1356167 1126663 16384 128 97586 168823 1396771 1673032 16384 256 120531 194219 2237049 1957942 16384 512 129382 209554 2381065 2088242 32768 4 20929 25080 334972 322316 32768 8 36868 44237 746237 657952 32768 16 62520 71373 985029 773720 32768 32 85772 107900 1421118 1200908 32768 64 106009 143845 1860002 1574459 32768 128 124422 164877 1809388 1716853 32768 256 119461 205390 1902695 1616571 32768 512 124626 208681 2275411 2071023 65536 4 20890 20886 376422 243750 65536 8 32393 36677 628781 622031 65536 16 51929 65112 912579 629198 65536 32 81015 105841 1295684 1156719 65536 64 103948 140448 1602041 1329063 65536 128 121443 175978 1650781 1476434 65536 256 136581 186339 1913075 1549980 65536 512 137705 181323 2035592 1370389 iozone test complete. Excel output is below: "Writer report" "4" "8" "16" "32" "64" "128" "256" "512" "64" 12841 19323 30696 35936 37403 "128" 16098 31551 40958 41666 50673 68558 "256" 19954 34632 36121 64451 60377 90360 70856 "512" 21498 29976 55279 69162 78902 86911 85120 103354 "1024" 20838 43760 59618 58894 102687 114310 93609 105610 "2048" 23442 35833 54323 81009 107484 131942 139442 126522 "4096" 20219 36898 63273 67246 99519 127612 114666 151709 "8192" 24020 37444 62468 98308 121438 95303 147760 140964 "16384" 21317 37795 55861 81326 94439 97586 120531 129382 "32768" 20929 36868 62520 85772 106009 124422 119461 124626 "65536" 20890 32393 51929 81015 103948 121443 136581 137705 "Re-writer report" "4" "8" "16" "32" "64" "128" "256" "512" "64" 26734 47868 75301 104376 145115 "128" 25559 32388 83770 115959 100072 185012 "256" 25293 52426 73144 111155 170874 192917 233381 "512" 29273 31523 67412 107833 168922 127169 225343 228072 "1024" 27171 37540 65389 91739 105915 125967 145474 152067 "2048" 24048 47091 83394 129834 160626 153559 227326 197071 "4096" 23169 44474 75755 103964 144749 188384 202230 229816 "8192" 24623 43741 67751 125103 142812 189003 192301 188816 "16384" 24120 46094 67473 118257 115400 168823 194219 209554 "32768" 25080 44237 71373 107900 143845 164877 205390 208681 "65536" 20886 36677 65112 105841 140448 175978 186339 181323 "Reader report" "4" "8" "16" "32" "64" "128" "256" "512" "64" 237174 566551 640954 955947 1599680 "128" 246632 731625 1114289 1217930 1598754 1727352 "256" 355096 619655 880256 927393 1855098 1445521 1376935 "512" 443254 398434 637650 605982 1635797 1677976 2287463 1413929 "1024" 232829 478238 1087111 1274922 1101046 1251518 1442326 2259550 "2048" 297540 742315 1197736 1529327 1094565 1284033 2197023 2420514 "4096" 366599 750743 1091699 913686 1878853 1946770 2216240 2340643 "8192" 393204 762333 877468 873919 1793698 1939824 1416031 2365590 "16384" 447576 623250 719727 1093357 1356167 1396771 2237049 2381065 "32768" 334972 746237 985029 1421118 1860002 1809388 1902695 2275411 "65536" 376422 628781 912579 1295684 1602041 1650781 1913075 2035592 "Re-Reader report" "4" "8" "16" "32" "64" "128" "256" "512" "64" 300665 503814 939223 1336792 735831 "128" 243832 643108 948860 707520 1024942 2464907 "256" 408297 680960 914752 1312954 1868008 1523457 2350543 "512" 428057 604447 535558 696600 1040545 1089647 2357784 2152206 "1024" 372090 369116 863343 1167489 1004951 1768345 1352828 1416636 "2048" 234538 547869 1054134 1379952 1513696 1306890 1209712 2273187 "4096" 357632 630342 839524 1369808 1644351 1075367 1759366 2227447 "8192" 227536 421396 601601 992832 973286 1645281 1910062 2080793 "16384" 421411 429948 897416 917362 1126663 1673032 1957942 2088242 "32768" 322316 657952 773720 1200908 1574459 1716853 1616571 2071023 "65536" 243750 622031 629198 1156719 1329063 1476434 1549980 1370389