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: Fri Oct 24 08:59:26 2025 Auto Mode Machine = Linux oleg103-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-oleg103-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 10034 20144 508587 647135 64 8 13442 31938 811459 877797 64 16 10830 55372 538156 863676 64 32 14807 76547 1143223 1163036 64 64 13658 82347 901377 1363961 128 4 11813 19601 774922 618653 128 8 15256 35635 211549 767171 128 16 14201 54605 1057236 847059 128 32 25492 70596 1269781 673778 128 64 22191 105334 1183041 1291158 128 128 20385 104923 1539168 3468030 256 4 14693 20861 739590 373111 256 8 13991 26798 707430 792543 256 16 26315 59815 1148625 603630 256 32 35010 70776 904732 1137672 256 64 38507 100784 1158540 653204 256 128 30321 116789 1487577 2486631 256 256 34238 102078 1673001 2152625 512 4 13568 19824 654759 619262 512 8 26593 36513 780390 772252 512 16 36657 58169 1132755 1080328 512 32 48016 70030 1387437 986529 512 64 40848 113199 1645826 1132755 512 128 44452 107450 1176828 1368865 512 256 35874 122932 1679288 1361920 512 512 38067 129064 1201856 2150051 1024 4 17789 21779 735086 599537 1024 8 29368 34969 803127 821876 1024 16 43958 56882 1291406 669331 1024 32 51893 83722 1358390 856286 1024 64 44950 101820 1480101 1248607 1024 128 51706 135775 1667426 1268896 1024 256 75510 143056 1136593 1261072 1024 512 65040 141064 1729884 1517224 2048 4 15593 20830 632133 463974 2048 8 31139 33727 983639 832212 2048 16 39646 59520 1170321 1001998 2048 32 57659 79599 1227693 924165 2048 64 63058 120825 1467159 1454489 2048 128 70552 126334 1425288 1305301 2048 256 89299 127062 1264191 1453505 2048 512 83769 146483 1756343 1657071 4096 4 18774 21793 593190 594751 4096 8 28798 36670 887353 1002922 4096 16 49153 59865 1223480 788002 4096 32 58932 68556 1526176 1241247 4096 64 74244 105241 1410868 1325115 4096 128 91785 128812 1570543 1445775 4096 256 81533 102448 1817243 1087346 4096 512 64274 141956 1792406 1669763 8192 4 20221 22259 661874 566013 8192 8 31009 33675 834646 863856 8192 16 45663 53381 874854 696121 8192 32 67262 85906 1479759 983313 8192 64 73330 100885 1174137 1209176 8192 128 75869 121810 1632539 1480525 8192 256 92874 139163 1585458 1462066 8192 512 82677 137898 1755752 1645281 16384 4 19942 22036 683009 579496 16384 8 32319 38415 991826 757574 16384 16 46679 54480 1304251 937256 16384 32 66336 74963 1436810 1131635 16384 64 77187 98506 1469564 1284817 16384 128 77055 111041 1744290 1331261 16384 256 86088 124974 1378309 1387296 16384 512 98059 138119 1536221 1497358 32768 4 19040 21981 656212 577756 32768 8 32778 36623 962937 875191 32768 16 42633 53126 1086724 955639 32768 32 60381 55629 1270820 737650 32768 64 54492 59064 1490276 978792 32768 128 60352 43544 850589 1096145 32768 256 26672 40660 564849 269290 32768 512