Gabor Bota created HADOOP-15423: ----------------------------------- Summary: Use single hash Path -> tuple(DirListingMetadata, PathMetadata) in LocalMetadataStore Key: HADOOP-15423 URL: https://issues.apache.org/jira/browse/HADOOP-15423 Project: Hadoop Common Issue Type: Sub-task Reporter: Gabor Bota Assignee: Gabor Bota
Right now the s3guard.LocalMetadataStore uses two HashMap in the implementation one for the file and one for the dir hash. {code:java} /** Contains directories and files. */ private LruHashMap<Path, PathMetadata> fileHash; /** Contains directory listings. */ private LruHashMap<Path, DirListingMetadata> dirHash; {code} It would be nice to have only one hash instead of these two for storing the values. An idea for the implementation would be to have a class with nullable fields: {code:java} static class LocalMetaEntry { @Nullable public PathMetadata pathMetadata; @Nullable public DirListingMetadata dirListingMetadata; } {code} or a Pair (tuple): {code:java} Pair<PathMetadata, DirListingMetadata> metaEntry; {code} And only one hash/cache for these elements. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org