Content Balance Check

This diagnostic is launched automatically every time you open its page and it allows you to rebalance the content in your cloud enhancing its performance and reliability.

Diagnostics	Details	Action
DataStores have Nodes with non-uniform capacity	Shows if the actual size of connected nodes is the same and/or how much it differs from the average size of the nodes.
DataStores have non-uniform Node structure	Indicates the average number of nodes per compute resource and shows the deviations in percents for each cluster.
Some disks are not distributed between compute resources	The disabled local read performance ensures that all stripes are located on different compute resources. This diagnostic ensures that you have the maximum reliability and in case a compute resource reboots or crashes, only one vDisk stripe gets degraded or inactive. This tab list the disks which stripes are located on the same compute resources. You can click the disk's label to view its details. The diagnostic is triggered red for data stores where the amount of compute resources equals to the number of stripes multiplied by replicas, that is Stripes×Replicas=Compute Resources. Using the Rebalance action without adding more compute resources will have no effect since this is an expected behavior.	Use rebalance to redistribute the content between compute resources so that each compute resource has one stripe of the vdisk.
Some disks are not optimized for local read performance	Local read performance ensures the complete stripe set is located on the same compute resource. This tab list the disks which stripes are located on different compute resources. You can click the disk's label to view its details.	Use rebalance option to rebalance the disk so that the complete stripe set is within one compute resource.
Content is not uniformly distributed across compute resources	Show the list of compute resources with indication of free space available for each compute resource and the percentage ratio to the average free space for all compute resources within one data store.	Use rebalance to redistribute the content between compute resources so that each compute resource has the same amount of free space which is equal to the average value.
Content is not uniformly distributed within compute resources	Shows the list of nodes with indication of free space available for each node and the percentage ratio to the average free space for all nodes in the data store. The diagnostic is not run for data stores where the amount of nodes equals to the number of stripes multiplied by replicas, that is Stripes×Replicas=Nodes. In this case, the Rebalance action is not available either.	Use rebalance to redistribute the content between nodes so that each node has the same amount of free space which is equal to the average value.
Some Virtual Servers are not placed in an optimal way	Lists the virtual servers which are running on different compute resources than their disks. This item will only be displayed for the current compute zone on the content balancer window if you are using "Local Read Path" there.	Use migrate option to migrate the virtual server to the compute resource where its disks are located.