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.

DiagnosticsDetailsAction

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√óReplicas=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√óReplicas=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.