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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12749) Tighten HFileLink api to enable non-snapshot uses
Date Tue, 23 Dec 2014 11:59:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14256911#comment-14256911
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Jonathan Hsieh commented on HBASE-12749:
----------------------------------------

bq. the only other concern is the removed FileStatus from the StoreInfo and the addition of
the FileSystem, but I still have to figure out why is that necessary.

check out HBASE-12332.  We don't have a FileStatus to attach to in that particular case initially.
 In the snapshot case we have the pattern file and get a fileStatus, and in the replicas case
we have a file status as well[1] 

The fs was needed for StoreFileInfo#getFileStatus (and getModificaitonTime) and StoreFile.Reader#open.
 Probably can just as easily as of a FS in StoreFileInfo#getFileStatus.  Didn't tackle those
pieces yet (they also seem more tightly coupled than ideal)

[1] https://github.com/apache/hbase/blob/master/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionFileSystem.java#L186


> Tighten HFileLink api to enable non-snapshot uses
> -------------------------------------------------
>
>                 Key: HBASE-12749
>                 URL: https://issues.apache.org/jira/browse/HBASE-12749
>             Project: HBase
>          Issue Type: Bug
>          Components: snapshots
>    Affects Versions: 2.0.0, 1.1.0
>            Reporter: Jonathan Hsieh
>            Assignee: Jonathan Hsieh
>         Attachments: hbase-12749.patch
>
>
> In HBASE-12332 we'd like to use the FileLink's IO redirecting powers but want to be able
to specify arbitrary alternate link paths and not be tied to the SnapshotFileLink file pattern
(aka, table=region-hfile).  
> To do this we need change the constructors and some internals so that it is more generic.
 Along the way, we remove the FileStatus constructor arguments in favor of Path's and reduce
the number of ways to create HFileLinks, and tighten up the scope privacy of many methods.



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