On Thu, 1 Feb 2001, Gerhard den Hollander wrote:
> The avg dump rate is listed as 2M/s
> The avg tape rate is listed as 10M/s
> ...
> is there any way to speed up the dump process ?
If you take a closer look at the numbers you'll see these are actually
averages over the individual file systems' dump rates, without taking
into account amount of data dumped for each data point in the average.
Put more plainly, these numbers are really bogus.
To really know how fast your dumps are going, look down the KB/s
column. Your numbers look pretty good to me. You've got better than
1 MB/s on all your big dumps. The slower ones are all small
incrementals. Incrementals are generally slower due to dump having
to hunt through the filesystem looking for stuff to dump. With fulls
you don't have to do that, you just dump everything. I normally look
at the KB/s column and only take notice of the level 0 speeds. If
they're up to snuff I'm happy and pretty much ignore the incrementals.
-Mitch
