Re: [Networker] How to speed up this backup (4GB -> 8 hours) ?

Hello,
Have you checked your network and make sure there is no errors on NIC card 
( Do a simple copy test, outside of networker and watch the timing).
Can your san performance be verified, any bottleneck or errors on san 
switch, hba ?
Lastly, does the linux server have any errors on it's log file for network 
etc?
Have you upgraded the client version to 7.4.4 ? if everything comes out 
ok, try and run a backup with extra verbose output, i am thinking that 
actual data transfer is quick, it is taking long time to initiate the 
backups ? or do you see a slow backup rate for apx 8 hr ?
HTH



Manel Rodero <manel AT FIB.UPC DOT EDU> 
Sent by: EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU>
03/19/2009 07:13 AM
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Subject
How to speed up this backup (4GB -> 8 hours) ?






Hello,

We have a client that always seems to stall until its backups finishes 
(at morning we see backup process at 99% and only one saveset for this 
client running) and we would like to know where the problem is: client, 
OS, filesystem, etc. so any idea would be very appreciated.

The client is 7.4.2 running in Linux Red Hat Enterprise Linux ES release 
4 (Nahant Update 7). Our server is 7.4.2 but yesterday we upgraded to 
7.4.4 with the same "problem".

The problematic saveset is the following:

/home2:
Used 277078076 1K-blocks
Available 723167204 1K-blocks
%occupied 28%

This saveset is mounted through a Fiber Switch Qlogic SAnSurfer attached 
to a Sun Storedge 3510. The filesystem is GFS from RedHat.

Some fragments from the bootstrap log of last week:

a) For a full backup:

   client1: /home2          level=full,    127 GB 12:19:56 9158073 files

b) For incremental (level) ones:

   client1: /home2          level=1,      1580 KB 07:25:11    121 files
   client1: /home2          level=2,      3391 MB 07:17:54  92124 files
   client1: /home2          level=3,      4409 MB 07:56:02 136712 files
   client1: /home2          level=4,      2748 MB 07:16:39  67574 files

We can notice in level logs that it seems the number of files doesn't 
matter as the backup has, more or less, the same duration. So the 
problem could be the total number of files and their comparison for 
backing up only the changed ones.

Any idea about what can we look for? Any clues about which problem could 
it be?

Thank you very much for any suggestions.

-- 

o o o  Manel Rodero Blánquez             | LCFIB - FIB - UPC
o o o  IT System Manager                 | Campus Nord - Modul B6
o o o  Barcelona School of Informatics   | Jordi Girona, 1-3
U P C  Technical University of Catalonia | 08034 Barcelona (Spain)
                                          |
        manel AT fib.upc DOT edu                 | Tel: +00 34 93 401 0847
        http://www.fib.upc.edu/           | Fax: +00 34 93 401 7040

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