How is the Data Repository heartbeat check performed?


Article ID: 221661


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DX NetOps


The Data Aggregator does a heartbeat check to verify node health, how is this performed?


Release : 20.2

Component : IM Data Storage


See: Data Repository Heartbeat Monitor Process

The heartbeat is a SQL call to each node, you can see the detailed check results in <installation_directory>/<apache-karaf-version>/shutdown_details.log

A degraded message indicates that it is taking longer than 20 secs for a heartbeat query to return/complete, this is done over TCP.

In the vertica.log on the Data Repository you can see the queries, for example:

YYYY-MM-DD HH:MM:SS.### Init Session:7ddaabddf700 [Session] <INFO> [Query] TX:0(v_drdata_node0003-12345:0x6b842) SELECT /*+label(DA_HEARTBEAT)*/ 1 FROM DUAL

You would see these on each node.

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