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Why is the backup of files taking so long?

yaknour
yaknour asked
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Last Modified: 2013-12-01
We are using Symantec BackupExec 12 on a Windows 2k3 Server (Enterprise), backing up a Windows 2k3 (Standard) server containing files and databases. The device we are using is a Quantum Ultrium LTO-4 half-height tape drive.

The databases are on SQL 2000 and take up about 10 GB.
The rest of the files (about 700,000) take up about 100 GB.

Both servers are on the same Gigabit switch.

When the backup runs, the SQL databases are backed up in minutes, with speeds of 4-5 GB/min. The files, on the other hand, take and average of 5 hours and  we are only getting 400-500 MB/min of throughput.

What could be the cause?
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Are you running SQL on the same machine as Backup Exec?
Where are the files stored? On a SAN or separate fileserver?

I use BE12 as wel and when I perform a local back-up the job rate is 2.5 to 3 GB per minute.
Data stored on a separate machine is slower in the backup and the job rate is about 400-500 Mb.

I think your networkspeed is decreasing your job rate numbers.
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Commented:
I am having a very similar issue. I even went sor far as removing Backup Exec 12 and re-installing it. This doesn't seem to have helped at all.  Our total backup is almost 2 terabytes. The backup is BE 12 on a Windows 2003 server and it backs up a single server that it also connects to on the same gigabyte switch. When the backup starts for the first hour or so it runs at sustained rates of between 1500-2000 megs per minute. The after that it drops to around 700 for a few hours then to 400 megs per minute for the duration of the job.  The odd thing is that when we first put in this solution the backup maintianed sustained rates of 1600 or more for the entire job duration.  The backup hardware is an Exabyte 7 tape LTO-4  changer.  I am nt sure how to determine what is causing the slow down.
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