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Re: amanda not dumping in parallel?
2007-10-03 07:49:06
Jean-Louis Martineau wrote:
What's the maxdumps setting?
Jean-Louis
Paul Lussier wrote:
Hi all,
I recently changed my disklist such that all DLEs which pertain to my
NFS appliance have a -1 spindle entry. My understanding of the man
page was that a -1 spindle setting for a set of DLEs on the same host
means they would be backed up in parallel.
I've checked with amadmin that the configuration change for these DLEs
reflect a -1 spindle, and I have 'inparallel' set to 16. Yet when I
look at the process table for the host in question, amstatus tells me
that all the DLEs are 'getting estimate', yet there's only single tar
process running for the estimate phase.
Did I do something wrong, or are estimates run sequentially and only
once the estimates are in are the actual dumps performed in parallel?
Could you post your config file?
There are a couple of things that could cause this. One example would be
if you don't have a holding disk. If you are going direct to tape, then
it won't dump in parallel. If that is your configuration, it could also
contribute to your speed issues in other ways, for example causing
"shoe-shining" on your LTOs, which would slow things down more. I don't
think I've seen an answer on that question yet.
There could also be issues with what partitions or spindles things are
mounted on, and contention from that perspective (referring to the speed
issue).
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Chris Hoogendyk
-
O__ ---- Systems Administrator
c/ /'_ --- Biology & Geology Departments
(*) \(*) -- 140 Morrill Science Center
~~~~~~~~~~ - University of Massachusetts, Amherst
<hoogendyk AT bio.umass DOT edu>
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Erdös 4
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