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R16 backup jobs start fast, then gradually slow down to a crawl

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dekkar

Technical User
Nov 18, 2008
11
AU
Hi all.... have a question on my backups using arcserve.

I was troubleshooting our nightly backup job (around 640Gb) which starts off really well.... in the 2,300Mb/min range.... I know the system is probably capable of more, but that speed is acceptable for me.

Anyways.... as time goes on, the speed reduces to around 600Mb/min..... which means the backup ends up taking 12hrs.


I did think it was the tape drive, so we purchased an RDX device to test with as they are cheap and run on a completely different interface. And exactly the same thing happens.

THe biggest culprit is an image of a VM, 420Gb in size. It seems that when Arcserve starts a new 'subjob' the whole slowdown thing starts again, but the other jobs are all smaller files.

I was wondering if anyone has seen this??


It doesnt matter if the files are local on the Arcserve box or across the network....


Thanks for the help,
Dekkar
 
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