Backup and restore times

Restore Speeds of 15gigsI have a Barracuda 390 backup unit that backs up over the network.  I have a 1TB file server that took 3 days to fully backup and I just did a test restore of 15gigs that took 18mins. To me these times seem very poor. Any thoughts on these times?

I just inherited this site that I am currently working.
GorapsI.T. ManagerAsked:
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robocatCommented:
It depends. If the file server contains millions of small files, then backup & restore times will be slow and this is to be expected.

It also depends on the storage subsystem of your file server and the number of IOPS it can handle.
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GorapsI.T. ManagerAuthor Commented:
I thought the network would have more of a impact on the speeds.  thoughts?
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noxchoGlobal Support CoordinatorCommented:
For 15MB/s network speed you got good results. Imho the bottle neck here is your network. See with this calculator how many MBs are transferred per second or minute: http://www.ibeast.com/content/tools/band-calc.asp
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Fred MarshallPrincipalCommented:
noxcho: that's a great calculator!  You have to "read between the lines" for Fast Ethernet and Gb Ethernet but that's easy to do.  

Indeed, it appears that the network is a likely bottleneck.  I hope it's obvious that a network rated at 1Gbps isn't going to deliver 1Gbps performance to any one particular application / task.  And the computers come into the limitation as well.
So, using that calculator, if you look at T3/DS3 for Fast Ethernet and OC12 for GB Ethernet then you will probably be quite close to reality.
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GorapsI.T. ManagerAuthor Commented:
So if I use a Approx in this next example it means that my 15.68GB that took 18mins is well above 45Mbs and just below OC3 156Mbs.  and your saying that's normal or not normal?  Gigabit switchs and Cat5e
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robocatCommented:
Why does everybody automatically assume the network is the bottleneck, when this is rarely the case in network backups?

Gigabit ethernet = 100MB/s.  
The restore throughput was only 15MB/s, using only 15% of available bandwidth.

Most file backups require IOPS, not throughput.  Are you backing up large amounts of small files?  What is the storage subsystem of your file server?
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robocatCommented:
I did a search for the Barracuda 390 and found this is a low end backup solution. A review claimed speeds between 9MB/s and 23MB/s for an average file system backup.

So you're getting what can be expected and the bottleneck is in the Barracuda.
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GorapsI.T. ManagerAuthor Commented:
@robocat Do you have a link to your findings?
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noxchoGlobal Support CoordinatorCommented:
The screenshot you've posted shows at which speed the restore was done. As you did not provide any additional details about your network speeds I suggested it is 15MBs. Well, if it is not then Barracuda is not using the full resources. Maybe it is inbuilt throttling to avoid network overusage?
Does you Narracuda provide an option to backup to local storage so that you could measure the speeds?
Are all switches really working on Gbit speeds?
If yes then you have to contact Barracuda directly and request explaining.
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robocatCommented:
http://www.pcpro.co.uk/reviews/servers/386974/barracuda-backup-server-390

"Performance for the 390 is similar to the Unitrends Recovery-312. A 23GB folder copy averaged 21MB/sec, while a Windows 8 full system backup ran at a more lowly 9MB/sec. "
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GorapsI.T. ManagerAuthor Commented:
I disagree with "I did a search for the Barracuda 390 and found this is a low end backup solution. A review claimed speeds between 9MB/s and 23MB/s for an average file system backup.  So you're getting what can be expected and the bottleneck is in the Barracuda." - I've tested in production and gotten a network assessment done.  Our network switch was causing performce issues.
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noxchoGlobal Support CoordinatorCommented:
As I said in my comment ID: 40715800
Are all switches really working on Gbit speeds?
If yes then you have to contact Barracuda directly and request explaining.
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GorapsI.T. ManagerAuthor Commented:
All Switches in here are crap and are being fork lifted out... This is not happening for 3 weeks.  I'll look at all the responses and give out points later today .
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