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Tim McMichael
Navigating the world of high availability...
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May, 2012
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May, 2012
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Tim McMichael
Exchange 2010: The mystery of the 9223372036854775766 copy queue…
Posted
11 months ago
by
TIMMCMIC
3
Comments
Database Copy Self-Protection Mode What would you say if I told you that a copy queue length (CQL) of 9 quintillion log files was not a bad thing? By the way, if you are wondering, that works out to a CQL of 9,223,372,036,854,775,766, a number...
Tim McMichael
Part 2: Datacenter Activation Coordination and the File Share Witness
Posted
11 months ago
by
TIMMCMIC
5
Comments
In Part 1 of this series, I provided a high level overview of how Datacenter Activation Coordination (DAC) mode works and how the database mount process on startup is affected when DAC mode is enabled. ( http://blogs.technet.com/b/timmcmic/archive...
Tim McMichael
Exchange 2010: Using seedingPostponed results in a seeded database…
Posted
over 1 year ago
by
TIMMCMIC
0
Comments
In Exchange 2010 the add-mailboxdatabasecopy command is utilized to add mailbox database copies to database availability group members. When a copy is first added to a member the database is automatically seeded along with the content index. ...
Tim McMichael
Exchange 2010: Mapping DAG network states to cluster network states…
Posted
over 1 year ago
by
TIMMCMIC
1
Comments
In Exchange 2010 after a Database Availability Group (DAG) is created a series of DAG networks is also created. These DAG networks serve to define how Exchange 2010 servers within the DAG will replicate and seed databases. The initial network...
Tim McMichael
Part 1: My databases do not automatically mount after I enabled Datacenter Activation Coordination
Posted
over 1 year ago
by
TIMMCMIC
8
Comments
Datacenter Activation Coordination (DAC) mode is a property of a Database Availability Group (DAG) that, when enabled, forces starting DAG members to acquire permission in order to mount databases. Administrators can enable DAC mode at any time after...
Tim McMichael
Verifying log file truncation…
Posted
over 1 year ago
by
TIMMCMIC
3
Comments
In support we see cases from customers regarding log file truncation. One question that commonly comes up is how do you verify log file truncation actually occurs? The most common method that administrators use when verifying log file truncation...
Tim McMichael
Backup dates and times are incorrect even though data has been committed to backup media successfully….
Posted
over 1 year ago
by
TIMMCMIC
0
Comments
This week I had a chance to speak with a customer who raised concerns that their backups were completed according to their backup application but Exchange was not showing that a successful full backup had occurred. In this instance, the customer...
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