Offer rate limits for replicating data
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Key: HDFS-1195
URL: https://issues.apache.org/jira/browse/HDFS-1195
Project: Hadoop HDFS
Issue Type: Improvement
Components: data-node
Affects Versions: 0.20.2
Environment: Linux, Hadoop 0.20.1 CDH
Reporter: Kevin Weil
If a rack of Hadoop nodes goes down, there is a lot of data to re-replicate.
It would be great to have a configuration option to rate-limit the amount of
bandwidth used for re-replication so as not to saturate network backlinks.
There is a similar option for rate limiting the speed at which a DFS rebalance
takes place: dfs.balance.bandwidthPerSec.
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