Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
> maybe redo that with record size 4K, which will give the average latency
> for single blocks, so a good estimate for a round trip time.
> iozone -i0 -s 4M -r 4k -Q [-o -e -c]
> the same with large record size (-r 1M) does not say too much,
> just by comparing, one can see that linear streaming will do much
> better than wait for the commit of every single block...
>
> my hope for proto A would be that latency is near the unconnected values,
> which should be virtually identical to the values without drbd.
>
drbd connected
bernd at pc-lenz test>../test1
N: 1024
min: 1380
avg: 2167
max: 211582
N: 1024
min: 1543
avg: 2119
max: 39924
drbd disconnected:
N: 1024
min: 1325
avg: 1738
max: 40091
N: 1024
min: 1514
avg: 2024
max: 15164
('iozone -s 4m -r 4k -i0 -o -c -e -Q' in both cases and in a nfs-mounted
directory)
Cheers,
Bernd