Eliminate FS image loading code duplication between OIV and FSImage
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Key: HDFS-1465
URL: https://issues.apache.org/jira/browse/HDFS-1465
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Affects Versions: 0.22.0
Reporter: Aaron T. Myers
Konstantin wrote in HADOOP-5467:
{quote}
Ideally we should have the same source code reading the fsimage file and then
using different visitors to process deserialized data. I think we can achieve
that goal by implementing a LoadFSImageVisitor, which will call FSNamesystem
methods to add inodes to the directory tree and so on, making it a replacement
to FSImage.loadFSImage().
The LoadFSImageVisitor can be passed to FSImageProcessor same as other visitors
Jakob implemented.
We can do it in a separate Jira, but it should be done before the next release
so that we had uniform deserialization in the release.
This approach will probably also require to move FSImageProcessor code inside
server.namenode package. The OfflineImageViewer itself should remain in tools.
{quote}
This work never got done, and it caused a problem in HDFS-1435. This JIRA is to
track that work.
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