Lync Server 2. 01. SQL Mirroring. Redundancy in Microsoft Lync Server 2.

Here's how to configure the mirror, handle routine server maintenance, and deal with. For SQL Server professionals, Windows PowerShell has been something of a mystery. Here's an introduction to the SQLServer Provider and sqlps cmdlets. Most modern Windows applications require.NET Framework to work properly. The roles and features setup wizard Server Manager in Windows Server 2012 R2 allows to. SQL Server Setup provides the ability to generate a configuration file based upon the system default and run-time inputs. You can use the configuration file to deploy.

SQL clustering configuration to SQL mirroring. SQL mirroring has been around for a while in the Microsoft SQL Server realm, but it's new to the Lync infrastructure.

The ability to provide redundancy in the back- end SQL Server infrastructure is key. Setting up and working with SQL mirroring in Lync isn't complicated. Let's take a look at what is involved with setting up the mirror, how to handle routine server maintenance when SQL mirroring is configured, and what to do when an outage occurs in a SQL Server node. It requires that you have two Back End servers running SQL Server 2. R2 or later. One server functions as the primary server.

The other server contains the same databases as the primary server, so it's essentially a mirror of the primary server. The idea is that, if the primary server goes offline, a failover to the databases on the mirror server occurs so that database operations can continue. If you want the failover to be automatic, you need a SQL witness as the decision maker.

The SQL witness isn't needed for scenarios in which manual intervention is acceptable. The Tech. Net article . If you want automatic failover, be sure to select the Use SQL mirroring witness to enable automatic failover option and specify the store you want to use as the SQL witness, as shown in Figure 1.

To do so, you can run Windows Power. Shell commands in the Lync Server 2. Management Shell. First, you can use the Get- Cs.

Database. Mirror. State cmdlet to find out the location of the primary and secondary databases on each SQL Server node and the mirroring status of those databases. The Get- Cs. Database. Mirror. State command to run is: Get- Cs. Database. Mirror. State –Pool. Fqdn Your. Pool. FQDN `–Database.

Learn how to uninstall stubborn SQL Server components from your system.

How to set up a mail server on a GNU / Linux system Step by step guide to install Postfix Ubuntu + Postfix + Courier/Dovecot IMAP + MySQL + Amavisd-new + SpamAssassin. Brent Ozar Unlimited's specialized experts focus on your goals, diagnose your tough database pains, and make Microsoft SQL Server faster and more reliable.

There are probably open sessions on the database you are attempting to bring offline. SQL Server is trying to roll back any existing workloads in-flight for that.

Type Userwhere Your. Pool. FQDN is the Fully Qualified Domain Name (FQDN) of the pool containing the databases you want to check.

Figure 2 shows sample output. In this case, the rtcab database located on the primary SQL Server node named State. On. Primary is the principal database and the rtcab database located on the secondary SQL Server node named State. On. Mirror is the mirror database. The principal and mirror databases are synchronized. Once the location is established and the status is checked, you can use the Invoke- Cs.

Database. Failover cmdlet to perform a manual failover so that the mirror database becomes the principal database. The command to run is: Invoke- Cs. Database. Failover –Pool. Fqdn Your. Pool. FQDN `–Database.

Type User –New. Principal Mirror. As you can see in Figure 3, you'll be asked to confirm the failover. If you proceed, you'll see the results.

In this case, the failover to the mirror databases on the State. On. Secondary node was successful. After the failover has completed, you can run the Get- Cs.

Database. Mirror. State command again to check the database location and status. As you can see in Figure 4, the rtcab database has changed from being hosted on the primary node (State. On. Primary) to being hosted on the mirror node (State. On. Mirror), evident by State. On. Primary now displaying Mirror and State.

On. Mirror now displaying Principal. After your maintenance work is complete, you need to failover your databases back to their original locations. Once again, you can use the Invoke- Cs. Database. Failover cmdlet: Invoke- Cs. Database. Failover –Pool. Fqdn Your. Pool. FQDN `–Database. Type User –New. Principal Primary.

Based on the results shown in Figure 5, the failover was successful. If you run the Get- Cs. Database. Mirror. State command at this point, you'll see that the databases are back their original locations.

However, sometimes operations go awry or something happens that's out of the ordinary. By knowing what to expect and what to do, administrators can improve their comfort level and competency when problems arise.

For example, suppose that the rtcab, rtcxds, and rtcshared databases on the State. On. Primary node are the principal databases. Suddenly, you discover that the State.

On. Primary node has gone offline. You have a SQL witness, so an automatic failover to the State. On. Secondary node occurs. At this point, you should run the Get- Cs.

Database. Mirror. State command shown previously to confirm that a failover occurred. As Figure 6 shows, you'll see that: The primary SQL Server node had indeed gone offline (indicated by the Status. Unavailable state for the State. On. Primary node). After you restart the SQL Server services, you can run the Get- Cs. Database. Mirror.

State command again to make sure the State. On. Primary node is back online and its rtcab, rtcxds, and rtcshared databases are listed as mirror databases.

As you can see in Figure 7, the State. On. Primary node is no longer in a Status. Unavailable state but rather a Mirror state. You can also see that the primary and mirror databases are now synchronized. At this point, you need to decide whether to keep the rtcab, rtcxds, and rtcshared databases on the State.

On. Secondary node as the primary databases or perform a manual failover so that the three databases the State. On. Primary node become the primary databases.

To do the latter, you can run the command: Invoke- Cs. Database. Failover –Pool. Fqdn Your. Pool. FQDN `–Database.

Type User –New. Principal Primary. After the manual failover, you should run the Get- Cs. Petz 5 All Toys Download Itunes there. Database. Mirror.

State command one last time to verify that the rtcab, rtcxds, and rtcshared databases on the State. On. Primary node are the primary databases, which was the original setup before the outage. Without it, automatic failover isn't possible. Even with automatic failover, you need to perform certain actions if a node goes offline. The process for handling an outage is similar to the process for handling maintenance, which is helpful when operations go awry because you'll already be familiar with some of the steps. All in all, I've been quite pleased with the concept and practical sense of how SQL mirroring applies to Lync Server 2.

I hope this back- end architecture will be kept in future Lync Server releases.

Download Windows Server 2. R2 Retired Content from Official Microsoft Download Center. Supported Operating System. Windows 2. 00. 0, Windows Server 2. Windows XP. . Any application capable of displaying PDF files.