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question

aravinth_chakravarthyr_173918 avatar image
aravinth_chakravarthyr_173918 asked ·

Opscenter on rac

Can opscenter be made to run on a RAC.

opscenter
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You can try "Failover Configuration" but not exactly RAC

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Lewisr650 answered ·

The Opscenter application uses the DSE Driver to talk to the cluster. The driver has load balancing algorithms built into it to do just that. Matter of fact, that's one of the value propositions of the entire DSE/Cassandra architecture is to provide high-availability, fault tolerance and no single point of failure to your application and the database. When you build an application on top of DSE/Cassandra using the DSE drivers your application will have those same highly available, fault tolerant, automated failover and fail back as well as load balancing across the cluster. Furthermore, the architecture supports the ability where if a node fails the data is still highly available and consistent. Nodes can come and go and your data will still be available. This is an Active-Active architecture that allows you to support the same application running in multiple regional datacenters where you application can failover from one DC to another and still maintain state.

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@Lewisr650 Thanks for your reply . Our question is related to opscenter and not datastax Enterprise . Opscenter multi node configuration with high availability.

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Lewisr650 avatar image Lewisr650 aravinth_chakravarthyr_173918 ·

OpsCenter comes with DataStax Enterprise. It does not support OSS environments. You can configure OpsCenter in a multi-instance, highly available config: https://docs.datastax.com/en/opscenter/6.5/opsc/configure/configFailover.html

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Lewisr650 answered ·

Opscenter is a monitoring and management console application written on top of Cassandra so it can run colocated with your environment or be offloaded to a dedicated DSE Cluster to manage multiple clusters while offloading the impact to application clusters. The intent is also to reduce Oracle across the datacenter for applications that don't need it. So, to answer your question, you can offload the impact of Opscenter to it's own cluster, but not to Oracle RAC.

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@Lewisr650 Our requirement is to build datastax opscenter and LCM in three nodes and share the loads across the three nodes .So in case if any one of the node is down ,the remaining nodes in the LCM can communicate and update the monitoring status of the DSE nodes.
do we have option like set load balancer / multi node LCM with failover ?

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aravinth_chakravarthyr_173918 avatar image
aravinth_chakravarthyr_173918 answered ·

@Lewisr650 in order to reduce the server load .As opscenter runs only on a single node, if many users are using the opscenter console ,the server load increases .Hence is there any way to resolve this issue.

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Lewisr650 avatar image
Lewisr650 answered ·

Why would you want to do that?

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