On Sat, 2009-08-08 at 08:14, Mattias Pantzare wrote:

> Your scalability problem may be in your backup solution.
We've eliminated the backup system as being involved with the
performance issues. 

The servers are Solaris 10 with the OS on UFS filesystems. (In zfs
terms, the pool is old/mature). Solaris has been patched to a fairly
current level.  

Copying data from the zfs filesystem to the local ufs filesystem enjoys
the same throughput as the backup system. 

The test was simple. Create a test filesystem on the zfs pool. Restore
production email data to it. Reboot the server. Backup the data (29
minutes for a 15.8 gig of data). Reboot the server. Copy data from zfs
to ufs using a 'cp -pr ...' command, which also took 29 minutes. 

And if anyone is interested it only took 15 minutes to restore (write) 
the 15.8GB of data over the network. 

-- 
Ed 


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