Details
Description
Currently, the default block placement policy always places the first replica in the pipeline on the local node if there is a valid DN running there. In some network designs, within-rack bandwidth is never constrained so this doesn't give much of an advantage. It would also be really useful to disable this for MiniDFSCluster tests, since currently if you start a multi-DN cluster and write with replication level 1, all of the replicas go to the same DN.
[per discussion below, this was changed to not add a config, but only to add a hook for testing]
Attachments
Attachments
Issue Links
- blocks
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HDFS-2826 Test case for HDFS-1476 (safemode can initialize repl queues before exiting)
- Closed