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https://issues.apache.org/jira/browse/HDFS-12713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16243860#comment-16243860
]
Ewan Higgs commented on HDFS-12713:
-----------------------------------
In HDFS-12665, [~virajith] suggested that we make the following changes to
{{BlockAliasMap.java}}:
{code}
diff --git
a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/blockaliasmap/BlockAliasMap.java
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/blockaliasmap/BlockAliasMap.java
index d276fb52036..e564097fd2e 100644
---
a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/blockaliasmap/BlockAliasMap.java
+++
b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/blockaliasmap/BlockAliasMap.java
@@ -47,6 +47,7 @@
*/
public abstract U resolve(Block ident) throws IOException;
+ public abstract String getBlockPoolID() throws IOException;
}
/**
@@ -74,10 +75,12 @@
/**
* Returns the writer for the alias map.
* @param opts writer options.
+ * @param blockPoolID block pool id to use
* @return {@link Writer} to the alias map.
* @throws IOException
*/
- public abstract Writer<T> getWriter(Writer.Options opts) throws IOException;
+ public abstract Writer<T> getWriter(Writer.Options opts, String blockPoolID)
+ throws IOException;
{code}
I think this is a good idea. Sketching it out in the code on my local branch I
think we also need to add BlockPoolID to the {{getReader}} call as well. This
is so readers can also load the right file, put the right bpid in the WHERE
clause, etc.
> [READ] Refactor FileRegion and BlockAliasMap to separate out HDFS metadata
> and PROVIDED storage metadata
> --------------------------------------------------------------------------------------------------------
>
> Key: HDFS-12713
> URL: https://issues.apache.org/jira/browse/HDFS-12713
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Virajith Jalaparti
> Assignee: Ewan Higgs
> Attachments: HDFS-12713-HDFS-9806.001.patch
>
>
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