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Exchange 2010 creating log file every 2 minutes

Posted on 2011-09-06
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I've got an Exchange 2010 server that is creating a 1MB log file every 2 minutes or so.  Any idea why this could be happening and how I might stop it?  Thanks.
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Question by:SupermanTB
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setasoujiro earned 250 total points
ID: 36493642
I think you are refering to transaction logs...
and this is normal behavior, but when you backup the server (exchange aware backup) then it should flush/commit all these logs
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by:Akhater
Akhater earned 250 total points
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Exchange transactional logs are an intrinsic part of exchange operation, they are used for recovery in case of a failure.

You should not attempt to change this behavior nor delete these logs manually. the correct way to flush (remove) the logs is by taking a full backup of your information store with an exchange aware backup

More about transactional logs
http://www.msexchange.org/articles/Transaction-Logs-Lifeblood-Exchange.html (it is for exchange 2003 but it is still the same with 2010 just the size of the log file changed from 5mb to 1 mb)

how to backup exchange http://www.simple-talk.com/sysadmin/exchange/backing-up-exchange-2010-for-free/
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by:SupermanTB
ID: 36496032
Interesting.  Currently it's creating 1.2GB/day of log files.  Seems a bit excessive, but I'm sure there's a good reason.

I'm also surprised that the only way to flush these logs is to backup using that process.  The Exchange database is about 50GB.  Transferring that much data across the network on a frequent basis would be annoying.

Is this the process you all use to backup Exchange 2010?  What do you use for offsite backup?
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by:setasoujiro
ID: 36496066
no i use backup exec, but it is pricy.

however windows backup can do the same since exchange 2010
http://technet.microsoft.com/en-us/library/dd876854.aspx

should be able to handle it as well.

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by:SupermanTB
ID: 36496091
Do you know if the QuickStart Edition of Backup Exec will backup Exchange?  What do you do about backing up offsite?
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by:setasoujiro
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no you need backup exec 2010 + exchange agent
costs about 1500€ i think (not sure)

to be honest i backup to tape and the clients store them at home/remote place
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by:Akhater
ID: 36496197
backupexec is a great solution but very costly for just one product if it is not part of a global backup solution. Built in backp is more than enough for one servers enviroments. 50gb database is really nothing to worry about
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by:Akhater
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just to add you dont need to backup to a netwoek location, any usb disk will do
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by:SupermanTB
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It is just a one server network, but I still have the problem of offsite backup.  I can backup to USB all day long, but if the building burns down, I'm toast.
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by:setasoujiro
ID: 36527397
the best option would be to have a branch office/remote home of someone, set up an IPSec tunnel between 2 firewalls

Office<--->home  , and setup a NAS so you can make the backupdisk copy itself to the NAS during the day.
this will not take too long and be a 'good' solution.
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by:Akhater
ID: 36527576
so what is the question? i mean what assistance you still need with this ?
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by:SupermanTB
ID: 36528943
Is the IPSec tunnell really an option for a 50GB exchange file?  I would think it would take quite some time to transfer a file of that size over an IPSec tunnel.
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by:Akhater
ID: 36528952
It depends on the link bandwidth but how is this relevant to the question ?
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by:setasoujiro
ID: 36528962
yeah as akhater says, it's not the same question anymore.
and as i said, you should do differential backups after the full initial backup.
then it will be a 2% of the 50GB each day...
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by:Akhater
ID: 36528964
your best option is to have a DAG with an offsite copy of the database if you want a real DR
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by:SupermanTB
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Thanks for the help guys.
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