Sumit Agrawal created HDDS-13657:
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Summary: min free space default configuration
Key: HDDS-13657
URL: https://issues.apache.org/jira/browse/HDDS-13657
Project: Apache Ozone
Issue Type: Sub-task
Components: Ozone Datanode
Reporter: Sumit Agrawal
Generally for cluster to be healthy, its recommended to have no more than
80-90% of disk utilization.
Currently our default
{code:java}
hdds.datanode.volume.min.free.space.percent is 0.1%
hdds.datanode.volume.min.free.space = 20GB
{code}
20GB/0.1% is being set considering previous default value of 5GB, considering
ozone use case. But overall,
Mostly as observed for disk size in TB range, and more particulary 16TB.
||%cent config||Disk size||min-free-space||
|0.1%|16TB| 20GB (Max(16GB,20GB)|
|1%|16TB|160GB|
|5%|16TB|800TB|
|10%|16TB|1.6TB|
Considering 10-20% should be kept free, 5% being better default configuration
based on disk size.
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