[jira] [Commented] (SENTRY-1915) Sentry should use old PathDump structures to send full snapshots to HDFS

["Alexander Kolbasov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SENTRY-1915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16151349#comment-16151349 ] 

Alexander Kolbasov commented on SENTRY-1915:
--------------------------------------------

[~vamsee] [~misha@cloudera.com] [~spena] [~mcrocker] FYI


> Sentry should use old PathDump structures to send full snapshots to HDFS
> ------------------------------------------------------------------------
>
>                 Key: SENTRY-1915
>                 URL: https://issues.apache.org/jira/browse/SENTRY-1915
>             Project: Sentry
>          Issue Type: Bug
>          Components: Sentry
>    Affects Versions: 2.0.0
>            Reporter: Alexander Kolbasov
>
> It turns out that in 2.0 we changed the way full snapshots are sent from Sentry to HDFS. Before they were using {{HMSPaths}} which used tree structure and eliminated some duplication. Also SENTRY-1827 helped to compressed this on the serialization side.
> Now we are using {{TPathChanges}} structure that is not tree-based and contains very non-efficient way of representing paths: {{required list<list<string>> addPaths;}} so we split each paths on slashes and store list of elements instead of sorting a tree



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