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pravega / zookeeper-operator

Kubernetes Operator for Zookeeper
Apache License 2.0
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Allow mounting 2 separate persistent volumes for dataDir and dataLogDir #587

Open rodolphogarrido opened 8 months ago

rodolphogarrido commented 8 months ago

Description

Proposal for allowing mounting 2 separate persistent volumes for dataDir and dataLogDir.

Importance

As mentioned in Zookeeper oficial doc:

Be careful where you put the transaction log. A dedicated transaction log device is key to consistent good performance. Putting the log on a busy device will adversely affect performance

Having a dedicated log device has a large impact on throughput and stable latencies. It is highly recommended to dedicate a log device and set dataLogDir to point to a directory on that device, and then make sure to point dataDir to a directory not residing on that device.

We could benefits in latency by separating these two directories.

Suggestions for an improvement

Allow mounting 2 separate persistent volumes for dataDir and dataLogDir.