Back up to a San is very slow
snowsnake
September 10th, 2009
Good morning. About 3 weeks ago I began noticing that my daily incremental back ups were running slower than usal. They would average 560 mb a minute now they are running at 70mb a minute. This is also happening with my full tape backups on the weekends. They all use to run around 560mb a minute and no anywhere from 33 to 60 mb a minute. I am not sure what else to check. The servers are both Dell's, a 2850 and a 2950 and I am running a Dell 3000i san. I am using Symantec 12.5 back up. Like I have stated before, I am not sure why this has slowed down. Any help would be appricated.
Thanks
May I know what is your
May I know what is your deployment strategy ?
perhaps using -SAN mode backup can faster the backup process.
/* Infrastructure Support Engineer */
If you're using a SAN, look
If you're using a SAN, look into SAN SSO which ships with Backup Exec (and is licensed).
It will allow you to utilise the full speed of your SAN, taking the network out of the equation. It will allow you to share your tape drive with other servers, and they can backup to that (assuming that your tape drive is connected to the SAN).
Backup times will increase, because currently your backups are going across the LAN. 4Gbps SAN vs. 1Gbps LAN...
Have you considered this?
If you find this is a solution, please mark it as such.
Mr SnowSnake, Please try to
Mr SnowSnake,
Please try to use something like the built-in FTP program via command line with WIndows and copy data from the SAN to a host.
When the transfer is complete, you will have a throughput figure in Kb/s.
There is a bottleneck somewhere in your network, and that dramatic change in throughput happened more than likley becuase of some sort of environmental change. Whether it be software, driver, disk config, AV software, etc...
Disable AV, test again, update NIC drivers, and tape drivers, test again, defrag, and even playing with MPIO if your array supports it.
Why do people complain about support wait times, when there is an online portal?
http://mysupport.symantec.com
MPIO will help with
MPIO will help with multi-pathing, and assuming that the tape drive is also connected to the SAN.
However, those jobs are going across the LAN...that's always going to be the bottleneck, and SAN SSO will help with this.
If you find this is a solution, please mark it as such.
Any news on this one...?
Any news on this one...?
If you find this is a solution, please mark it as such.
SAN SSO License
Hi Craig, does that means SAN SSO license is another option that we have to purchase separately ?
and one last question, so in this case by using the iSCSI SAN connection sharing the same switch we can backup the host into the iSCSI SAN storage off the LAN ?
Thanks.
/* Infrastructure Support Engineer */
Hi Albert, SAN SSO is another
Hi Albert,
SAN SSO is another license that you need to buy, yes. From there you run a wizard on the server that has BEWS on it, and you need a license for a full installation of BEWS on any other server you want to backup via the SAN. The benefit of this is that it offers backups at SAN speeds, and takes the performance hit off your LAN. Your jobs would therefore finish a lot quicker.
You can read up on it here:
http://support.veritas.com/docs/258734
If you find this is a solution, please mark it as such.
OK, thanks for the
OK, thanks for the clarification Craig.
Cheers.
/* Infrastructure Support Engineer */
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