Karthik Palanisamy created HDFS-15253:
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Summary: Set default throttle value on
dfs.image.transfer.bandwidthPerSec
Key: HDFS-15253
URL: https://issues.apache.org/jira/browse/HDFS-15253
Project: Hadoop HDFS
Issue Type: Bug
Components: namenode
Reporter: Karthik Palanisamy
Assignee: Karthik Palanisamy
The default value dfs.image.transfer.bandwidthPerSec is set to 0 so it can use
maximum available bandwidth for fsimage transfers during checkpoint. I think we
should throttle this. Many users were experienced namenode failover when
transferring large image size along with fsimage replication on
dfs.namenode.name.dir. eg. >25Gb.
Thought to increase,
dfs.image.transfer.bandwidthPerSec=52428800. (50 MB/s)
dfs.namenode.checkpoint.txns=2000000 (Default is 1M, good to avoid frequent
checkpoint. However, the default checkpoint runs every 6 hours once)
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