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https://issues.apache.org/jira/browse/HBASE-1249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12703742#action_12703742
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Erik Holstad commented on HBASE-1249:
-------------------------------------
Extra comment on Jonathan's comment:
About deletes.
So when you enter a new file and walking down the lists doing the sorted merge
between the data in the store, the gets and the previous deletes. When finding
a delete in the current file this is just added to the newDelete list. Since
all data is sorted the inserts in the newDeletes list will be sorted too. When
the current store is done and if you need to go to the next one you first merge
the oldDeletes with the new and use these for checking in the next storefile.
Same thing is done for the gets, in the case of a GetRow/GetFamilies call.
Versions are just a different list that sits in the GetXServer. This list is
handled differently depending on what kind of call it is. In case of a
GetColumns call this list is getting smaller and smaller and for the other
cases it gets bigger and bigger. This is because columns are removed from the
column list in the case of a GetColumns call, so the versions list has to match.
> Rearchitecting of server, client, API, key format, etc for 0.20
> ---------------------------------------------------------------
>
> Key: HBASE-1249
> URL: https://issues.apache.org/jira/browse/HBASE-1249
> Project: Hadoop HBase
> Issue Type: Improvement
> Reporter: Jonathan Gray
> Priority: Blocker
> Fix For: 0.20.0
>
> Attachments: HBASE-1249-Example-v1.pdf, HBASE-1249-Example-v2.pdf,
> HBASE-1249-GetQuery-v1.pdf, HBASE-1249-GetQuery-v2.pdf,
> HBASE-1249-GetQuery-v3.pdf, HBASE-1249-GetQuery-v4.pdf,
> HBASE-1249-StoreFile-v1.pdf, HBASE-1249-StoreFile-v4.pdf
>
>
> To discuss all the new and potential issues coming out of the change in key
> format (HBASE-1234): zero-copy reads, client binary protocol, update of API
> (HBASE-880), server optimizations, etc...
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