Today I wanted to talk about Distributed Cache (or also called AppFabrikCache) on SharePoint Server 2013.
This new way of caching was originally based on the “Cloud” of Microsoft (Azure) but has been integrated on the On Premise systems of Microsoft. The Distributed Cache can be deployed on 2 different ways
On the dedicated mode only this service is running on the application server and all other services are stopped who is hosting the AppFabric Cache Service.
On The Collocated mode the Distributed Cache is running with all other Service Applications on the Application Server. This is the recommended mode for deploying Distributed Cache.
The SharePoint Prerequisites installation Wizard installs The AppFabric Cache who is needed for SharePoint 2013. Without this prerequisites you can’t install or run SharePoint 2013. How do we configure it or how do we use this cache? Actually you have to
do nothing, it’s all made automatic. In a SharePoint Server 2013 farm, there must be at least one cache host running the Distributed Cache service.
What do we find on this cache?
Check the following link to get a better overview of it:
Some benefits of using microblog features, feeds, and the Distributed Cache include the following:
For SharePoint Server 2013 you have to plan the capacity of Distributed Cache. It’s not because it’s installed automatically that you don’t have to plan it…
As you know the AppFabric Cache stocks data on memory and uses when users try to access it. So if you have more than 500.000 users you need 12GB cache size of the Distributed Cache service. So if you give him only 1 GB, you will ensure some problems.
Distributed Cache 2
By Default it takes 5% of the physical memory of the server. You can’t change this on the Central Administration by the UI but only by PowerShell:
Update-SPDistributedCacheSize. This PowerShell command Specifies the memory size in megabytes (MB) that you want to allocate to the Distributed Cache service. The default value is 5 percent of total system random access memory (RAM). This value
should not be more than 40 percent of total system RAM with a maximum limit of 16 gigabytes (GB).
More information about the PowerShell Command:
An example of changing the SPDistributedCacheSize
Distributed Cache 3
Important to know is that if you are using a Virtual Machine and not a Physical Machine for your SharePoint Farm(s) do not use Dynamic Memory Usage. The Memory Allocation for Virtual Machines should be on “Fixed” Memory.
When the Distributed Cache service runs in collocated mode, the physical memory of the server should be increased and all non-essential services stopped. It is not recommend that any of the following services or applications run on the same server as the
Distributed Cache service:
The Distributed Cache service uses the following communication ports: