It's not "suicide" to back up an active db, but you can run into problems backing up the target db of a mass migration while the migration is going on.
Backup suspends committing log files to the DB while the backup is running. Exchange has a threshold of the maximum number of uncommitted log files it will allow. If it exceeds that number, it dismounts the database. Normally you won't ever exceed that, but migrations generate massive amounts of log files on the target db, and you can end up having the db dismount in the middle of your migration if you try to run a backup while it's going on. DAMHIKT. From: David Liu [mailto:ganymed...@gmail.com] Sent: Friday, July 01, 2011 10:00 AM To: MS-Exchange Admin Issues Subject: Re: 2010 migration Sorry to hijack the thread but conitnuing on the thread of backup, is it suicidal to backup the active db? Problem we run into in our environemtn as we plan out migration to 2010 is that we have one prod site & one DR site & our backup library & mgmt console both reside in prod. So, in other to perform 2010 backup either we'd have to spin up another server hosting all the passive mb db's or cough up extra $$ to set up a backup enviroement in our DR site to backup the passive db's. I understand best practice is to backup passive db's but what is everyone doing in a situation such as ours, which I assume is quite a common setup. We are overprovisioning our Ex2k10 setup to use 10K RPM SAS disks/8 core proc's/36GB RAM on 2 mb servers hosting some 4000 mb's averaging 300mb each (which is more than what the mailbox calculator recommends) but I'm still not not sold that we wont run into potential performancne issues if we were to backup the active db's. Any thoughts? On Fri, Jul 1, 2011 at 8:25 AM, Sobey, Richard A <r.so...@imperial.ac.uk<mailto:r.so...@imperial.ac.uk>> wrote: Re: the backups - is that merely for performance reasons? -----Original Message----- From: bounce-9366658-8066...@lyris.sunbelt-software.com<mailto:bounce-9366658-8066...@lyris.sunbelt-software.com> [mailto:bounce-9366658-8066...@lyris.sunbelt-software.com<mailto:bounce-9366658-8066...@lyris.sunbelt-software.com>] On Behalf Of Campbell, Rob Sent: 01 July 2011 00:19 To: MS-Exchange Admin Issues Subject: RE: 2010 migration If you can, allocate more log file space on the 2010 servers while you're doing the migration, and monitor it, or turn on circular logging until you're done migrating. Moving mailboxes generates lots of transactions and lots of logs. Also be sure you don't have any backups of the 2010 servers scheduled while the migration is running. -----Original Message----- From: Wayne Dueck [mailto:wayne.l.du...@state.or.us<mailto:wayne.l.du...@state.or.us>] Sent: Thursday, June 30, 2011 6:05 PM To: MS-Exchange Admin Issues Subject: 2010 migration Hello, We are migrating our mailboxes from 2007 to 2010 and I was looking into a powershell command to simlify things. I google'd it and found scripts that had alot of confusing language. (I'm not a programmer). What I have come up with is - Get-Mailbox -Database <database name> | New-MoveRequest -TargetDatabase <new DB name> and I was wondering if this is all that's needed. Appears to work in my test lab. Should I add any parameters? Any other advice? Thanks in advance. -Wayne --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist ************************************************************************************************** Note: The information contained in this message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. ************************************************************************************************** --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist ************************************************************************************************** Note: The information contained in this message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. ************************************************************************************************** --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
