DataStax Developer Blog

Improved Ring View in OpsCenter 4.0

By Orion Moore -  November 20, 2013 | 0 Comments

We are in the process of completely redesigning the OpsCenter user interface.   The redesign is focused on integrating a large amount of feedback we’ve received and vastly improving our support of larger clusters.  With OpsCenter 4.0 we implemented the redesign of the cluster ring view and it offers an excellent taste of the improvements that are coming to all of OpsCenter.

The Improved Cluster Rings

While OpsCenter’s ring view has always done a great job of displaying small clusters, it was significantly less useful for large ones. With hundreds of nodes, the ring would grow so large that a significant amount of scrolling had to be done to view the entire ring and a huge amount of space was wasted. At that size, the ring view did not provide a meaningful summary of how the cluster was doing at a single glance.

Several changes have made it so the ring view will do a significantly better job of displaying a large cluster. First, the minimum size of the nodes was reduced making it easier to fit more nodes onto the ring. Second, there is now a separate ring for each data center. The end result is that a 200 node cluster split into 2 data centers now easily fits on the screen.

Another new feature that makes the ring easier to examine is a summary that is displayed in the center of the ring when you hover over any node.   Just as the ring view did previously, clicking a node will display a dialog containing a summary of the information for the node and allow you to execute operations on it.

NewRingViewSmall

The Cluster Health Summary

The cluster health summary makes it easy to get a clear picture of how your cluster is doing. It contains counts of nodes experiencing different loads.  It also displays the total data size of your cluster, the average amount of data per node, and the standard deviation.  Even if all your rings don’t fit in your browser window a the same time, the cluster health summary can always be taken in at a glance.

The cluster health summary also allows you to get more detail on a group of nodes.  When you hover over the node counts the corresponding nodes are highlighted in the ring.  When you click on the count, a drop down of the nodes appears allowing you to get to the detailed view of the node.

ClusterHealthClickAndHoverSmall

Download OpsCenter 4.0 to checkout the improved ring view on your cluster.



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