Penghui Li created PULSAR-9:
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Summary: Improve the message written count metrics for the topic
Key: PULSAR-9
URL: https://issues.apache.org/jira/browse/PULSAR-9
Project: Pulsar
Issue Type: Improvement
Reporter: Penghui Li
Currently, Pulsar exposes the message written count metrics though the
Prometheus endpoint, and the metrics maintain in the broker, no been
persistent. So if the topic ownership changes or restart broker, this will lead
to reset the message written count of the topic to 0. This will confused users
and not able to get the correct message written count metrics.
PIP-70
[https://github.com/apache/pulsar/wiki/PIP-70%3A-Introduce-lightweight-raw-Message-metadata
|https://github.com/apache/pulsar/wiki/PIP-70%3A-Introduce-lightweight-raw-Message-metadata]Introduced
a broker level entry metadata which can support message index for a topic(or
message offset of a topic), this will provide the ability to calculate the
precise message written count for a topic. So we can leverage PIP-70 to improve
the message written count metrics for the topic
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