Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Tue, 8 Jan 2013, Andy Dills wrote: > # lvcreate -n test -L 10G data > # mkfs.ext3 /dev/data/test > # mount /dev/data/test /mnt > # pveperf /mnt > > CPU BOGOMIPS: 95995.32 > REGEX/SECOND: 838290 > HD SIZE: 9.84 GB (/dev/mapper/data-test) > BUFFERED READS: 477.27 MB/sec > AVERAGE SEEK TIME: 5.87 ms > FSYNCS/SECOND: 631.64 > DNS EXT: 43.10 ms > DNS INT: 1.18 ms > > The fsyncs/second should be tremendously higher. For what it's worth, here's what pveperf looks like with the resource disconnected: # pveperf /mnt CPU BOGOMIPS: 95997.00 REGEX/SECOND: 877865 HD SIZE: 9.84 GB (/dev/mapper/data-test) BUFFERED READS: 465.67 MB/sec AVERAGE SEEK TIME: 5.83 ms FSYNCS/SECOND: 1691.68 DNS EXT: 42.45 ms DNS INT: 1.01 ms And here are some simple DD tests: Connected: # dd if=/dev/zero of=/mnt/file.tmp bs=512M count=1 oflag=direct 1+0 records in 1+0 records out 536870912 bytes (537 MB) copied, 3.2879 s, 163 MB/s Disconnected: # dd if=/dev/zero of=/mnt/file.tmp bs=512M count=1 oflag=direct 1+0 records in 1+0 records out 536870912 bytes (537 MB) copied, 1.54669 s, 347 MB/s Any ideas why I'm seeing roughly 40% performance when my nodes are connected? Thanks, Andy --- Andy Dills Xecunet, Inc. www.xecu.net 301-682-9972 ---