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https://issues.apache.org/jira/browse/HDFS-15133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17024869#comment-17024869
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hemanthboyina edited comment on HDFS-15133 at 1/28/20 5:40 AM:
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thanks for the improvements [~maobaolong]
{quote}how to implements the method getMapIterator graceful for the
RocksInodeStore.
{quote}
you can use
{code:java}
RocksDB db = RocksDB.open(new Options(), "/path");
db.newIterator();{code}
{quote} Clear method will be implements to reset the rocksdb for the
RocksInodeStore.
{quote}
you should delete all the entries in rocksdb , so we should be deleting using
DeleteFilesInRange()
some questions
1) how you have linked HeapInodeStore with RocksInodeStore ?
2) any changes in existing INodeMap tree structure ?
3) are you pushing complete INodeMap to RocksDB ?
was (Author: hemanthboyina):
thanks for the improvements [~maobaolong]
{quote}how to implements the method getMapIterator graceful for the
RocksInodeStore.
{quote}
you can use
{code:java}
RocksDB db = RocksDB.open(new Options(), "/path");
db.newIterator();{code}
one question , how you have linked HeapInodeStore with RocksInodeStore ?
> Use rocksdb to store NameNode inode and blockInfo
> -------------------------------------------------
>
> Key: HDFS-15133
> URL: https://issues.apache.org/jira/browse/HDFS-15133
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 3.3.0
> Reporter: maobaolong
> Priority: Major
> Attachments: image-2020-01-28-12-30-33-015.png
>
>
> Maybe we don't need checkpoint to a fsimage file, the rocksdb checkpoint can
> achieve the same request.
> This is ozone and alluxio way to manage meta data of master node.
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