[
https://issues.apache.org/jira/browse/HIVE-21225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16856184#comment-16856184
]
Gopal V commented on HIVE-21225:
--------------------------------
The DirSnapshot can also implement .exists(), so that you can avoid having
methods like
{code}
public static boolean isRawFormat(Path baseOrDeltaDir, FileSystem fs,
List<FileStatus> files) throws IOException
{code}
instead be able to do
isRawFormat(HdfsDirSnapshot)
directly
> ACID: getAcidState() should cache a recursive dir listing locally
> -----------------------------------------------------------------
>
> Key: HIVE-21225
> URL: https://issues.apache.org/jira/browse/HIVE-21225
> Project: Hive
> Issue Type: Improvement
> Components: Transactions
> Reporter: Gopal V
> Assignee: Vaibhav Gumashta
> Priority: Major
> Attachments: HIVE-21225.1.patch, HIVE-21225.2.patch,
> async-pid-44-2.svg
>
>
> Currently getAcidState() makes 3 calls into the FS api which could be
> answered by making a single recursive listDir call and reusing the same data
> to check for isRawFormat() and isValidBase().
> All delta operations for a single partition can go against a single listed
> directory snapshot instead of interacting with the NameNode or ObjectStore
> within the inner loop.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
