Networker

Re: [Networker] Limit on number of savesets in an nsrclone?

2008-03-09 03:45:47
Subject: Re: [Networker] Limit on number of savesets in an nsrclone?
From: Vincent Lin <vlinx AT YAHOO DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Sat, 8 Mar 2008 23:33:44 -0800
On one of my 7.2.2 build 494 Networker servers, 
I've got 1,700+ savesets devided into 2 tape pools across 4 x 1 TB AFTDs.
I break them down to some small batches, 100 savesets per run per LTO2 tape 
drive over 4 drives.
It is much more manageable this way.

----- Original Message ----
From: Peter Viertel <Peter.Viertel AT MACQUARIE DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Sent: Sunday, March 9, 2008 12:26:09 PM
Subject: Re: [Networker] Limit on number of savesets in an nsrclone?

I clone absolutely everything by ssid under some of my 7.2.2.494
systems. I've bigger lists than that in by file and by stdin without any
issues. Just looking at recent tempfiles I have lying around - one has
528 ssid's in it and adds up to  11435 bytes, and that went through just
fine.   Not to say there's not a bug in 7.3.3 though.   I will be doing
a big batch on a 7.3.3 system this afternoon and will keep Ian's
reported problem in mind for that.

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Werth, Dave
Sent: Saturday, 8 March 2008 4:37 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Limit on number of savesets in an nsrclone?

I don't know if this applies but often there is a limit on the length of
a command line.  In Solaris I believe it is 2048 bytes.  So even though
you're putting the savesets to be cloned in a file it may be parsing it
into a command line as if you had tried to write it all without the
savesets file.  So it's not so much the number of savesets you can clone
but the total length of the command line that results.  For instance if
your savesets were name a, b, c, etc. you might be able to clone well
over 1000 savesets.

Dave

Dave Werth
Garmin AT, Inc.
Salem, Oregon
-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Ian G Batten
Sent: Friday, March 07, 2008 8:35 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Limit on number of savesets in an nsrclone?

I'm in the process of binary chopping to find the limit, but it  
appears that there is a limit to the number of savesets I can  
reference in an nsrclone -S -f /file/name (Networker 7.3.3 on Solaris  
10).  175 is OK, while 250 is too many.

I have a script which implements a policy of writing a daily tape of  
activity in a given pool, but not deleting the files until a week has  
passed.  Recently we wrote a lot of savesets during one day, taking  
the amount of activity to go to tape at night over the magic  
threshold, from which there is no return.  nsrwatch shows the clone  
job start (cloning session: XXX save sets  reading from...) but then  
immediately reports completion, while the client sees the messages  
below.

/etc/tools/clonetotape.test: saving 313 savesets from  
IncrementalsStaging.003.RO to Incrementals...
+ nsrclone -b Incrementals -s backup-srv.ftel.co.uk -S -f /tmp/ 
clonetotape.test.25004
nsrclone: RPC error: RPC receive operation failed.  A network  
connection could not be established with the host.
nsrclone: Cannot open nsrclone session with backup-srv.ftel.co.uk
nsrclone: Cannot open nsrclone session with backup-srv.ftel.co.uk.  
Error is 'RPC receive operation failed.  A network connection could  
not be established with the host.'
nsrclone: Failed to clone any save sets

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