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Re: 20020305: moving the ldm.pq file?

Unidata Support wrote:
> 
> ------- Forwarded Message
> 
> >To: address@hidden
> >cc: address@hidden
> >From: Christopher Herbster <address@hidden>
> >Subject: moving the ldm.pq file?
> >Organization: Embry Riddle
> >Keywords: 200203052023.g25KNYK17050 LDM ldm.pq
> 
> I would like to move the ldm.pq file to a different filesystem.  Can I do the 
> following:
> 
> ldmadmin stop
> 
> cp old_path/ldm.pq new_path/ldm.pq
> 
> Make the appropriate change to the pq_path variable in ldmadmin
> 
> ldmadmin start
> 
> I'd prefer to do this so that we don't request those products that we already 
> have in the queue.
> 
> I'd guess that this is okay to do, but I think that the pq file is "memory 
> mapped" and I want to make sure that this is only an issue when the ldm is 
> running.
> 
> Thanks, as always, for the help!
> 
> Chris H.
> 
> ------- End of Forwarded Message

-- 
Hi Chris,

The process you described sounds fine.  In theory you could probably cp
the queue without stopping the ldm, but that might produce some odd
results depending on exactly how cp works and what state the queue is in
when the copy occurs.  Better to have the queue in a known stable state.

But, you mentioned copying the queue to another file system.  Bear in
mind that when the ldm is running the queue must be on a local disk. 
So, if you fire up the ldm using the new queue, that queue must be
local.

But, I don't fully understand your broader goal.  Do you expect to do
this often? 

Anne

***************************************************
Anne Wilson                     UCAR Unidata Program            
address@hidden                 P.O. Box 3000
                                  Boulder, CO  80307
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