Tracking messages in Exchange 2013 log files - easy and quick!

Tracking messages in Exchange 2013 log files - easy and quick!

The huge scalability of Microsoft Exchange carries serious disadvantages in addition to all its benefits. One of these cons - difficulties in message tracking from log files. Because of you have multiple transport servers, every message passing through every mailbox server and leave it's trail in logs.

Today I will try to at least partially help you in message tracking in Exchange 2013.

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Step-by-step deploying AlwaysOn on MS SQL 2012

Step-by-step deploying AlwaysOn on MS SQL 2012

Before Microsoft SQL Server 2012 and mechanism AlwaysOn were released, database administrators had only Database Mirroring as solution for replicating databases. It was the only option to get the "cheap" high availability. And Database Mirroring was not so good as it intended to be. Moreover, as my testings showed (and this is NOT written in documentation), it is NOT synchronous replication and transaction logs.

In short - we have studied the behavior of the database during intensive recording and different faults. What failures we saw:

  • Planned shutdown of the master server (manual service stop) of the master server without any notification of the mirror server.
  • Unplanned shutdown of the master server.

Oddly enough, it was a planned shutdown that showed that there is a difference between a mirrored database on the master and the mirror servers.

Therefore, I would not recommend to use Database Mirroring in production deployments, but take a look at the AlwaysOn technology.

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High availability and fault tolerance of Client Access Servers (CAS) in Exchange 2013

High availability and fault tolerance of Client Access Servers (CAS) in Exchange 2013

Starting from version Exchange 2010, developers presented to us very good solution for high availability and fault tolerance of Mailbox Database Servers - Database Availability Group (DAG).

But situation was not so funny with high availability of Client Access Server in Exchange 2010. We had to create CAS-Arrays and NLB-clusters (based on Windows or hardware solutions).

Fortunately, in Exchange 2013 Microsoft gone forward to the brand new solution of providing client access to the service. Actually, now we have "former" Outlook Anywhere, which work for the clients from the Internet, as well as for the clients from the Intranet. Client requests to servers now processed independently of connection, i.e. now it's absolutely not important, which exactly CAS-server respond to the client, because all processings of requests are done at Mailbox servers, and CAS-servers just throw packets hither and thither .

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