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Can you add a ha namenode without cluster downtime?

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Can you add a ha namenode without cluster downtime?

Explorer

Currently we have no HA on the name node in a HDP 2.2 cluster in production.

We are trying to determine if we can add a new node and enable it has a standby namenode.

Our objective is to enable namenode HA on the hortonworks cluster without taking the cluster offline.

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Re: Can you add a ha namenode without cluster downtime?

@S Roy

No as we have to run checkpoint on the NN and save the namespace. You have to have downtime to enable HA

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Re: Can you add a ha namenode without cluster downtime?

@S Roy

No as we have to run checkpoint on the NN and save the namespace. You have to have downtime to enable HA

View solution in original post

Re: Can you add a ha namenode without cluster downtime?

Re: Can you add a ha namenode without cluster downtime?

Explorer

We have a process which pulls messages from MQ and puts it in HBase. Since the messages have a 10 sec expiry we cannot afford to have the cluster down. What do people do in such situations?

Re: Can you add a ha namenode without cluster downtime?

@S Roy Please post it as new question :) I will try to answer

Re: Can you add a ha namenode without cluster downtime?