CODEWITHSUNDEEP
activemq-artemis
Viraj
Viraj

Reputation: 5381

Minimum cluster deployment for HA in Apache Artemis?

My application uses the following ActiveMQ Artemis cluster configuration as I need minimum number of nodes and HA.

Is this right cluster configs for production system? If not what you recommend?

Update

In above cluster when master fails we loose HA. Therefore I thought of having 2 slaves.

For split brain i found following documents helps

Specifically, the backup will become active when it loses connection to its live server. This can be problematic because this can also happen because of a temporary network problem. In order to address this issue, the backup will try to determine whether it still can connect to the other servers in the cluster. If it can connect to more than half the servers, it will become active, if more than half the servers also disappeared with the live, the backup will wait and try reconnecting with the live. This avoids a split brain situation. https://activemq.apache.org/components/artemis/documentation/2.0.0/ha.html

Would above documentation means when i have temp network failure between master and slave , slave will check for reachability of other slave before promoting to master , thus mitigating split brain ?

Upvotes: 0

Views: 498

Answers (1)

Justin Bertram
Justin Bertram

Reputation: 35008

If you're using replication then the minimum number of recommended nodes to mitigate split-brain is 6. Three lives to establish a proper quorum and three corresponding backups. Keep in mind that only the live nodes participate in quorum voting so have 1 live and 2 backups won't help with mitigating split-brain in the case of temporary network failures.

If you're using shared-storage then the minimum number of recommended nodes to mitigate split-brain is 2. Just one live and one backup. This is because the file-lock on the file-system (e.g. SAN or NAS) mitigates against split-brain.

Upvotes: 1

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