Land DocValues on trunk
-----------------------
Key: LUCENE-3108
URL: https://issues.apache.org/jira/browse/LUCENE-3108
Project: Lucene - Java
Issue Type: Task
Components: core/index, core/search, core/store
Affects Versions: CSF branch, 4.0
Reporter: Simon Willnauer
Assignee: Simon Willnauer
Fix For: 4.0
Its time to move another feature from branch to trunk. I want to start this
process now while still a couple of issues remain on the branch. Currently I am
down to a single nocommit (javadocs on DocValues.java) and a couple of testing
TODOs (explicit multithreaded tests and unoptimized with deletions) but I think
those are not worth separate issues so we can resolve them as we go.
The already created issues (LUCENE-3075 and LUCENE-3074) should not block this
process here IMO, we can fix them once we are on trunk.
Here is a quick feature overview of what has been implemented:
* DocValues implementations for Ints (based on PackedInts), Float 32 / 64,
Bytes (fixed / variable size each in sorted, straight and deref variations)
* Integration into Flex-API, Codec provides a
PerDocConsumer->DocValuesConsumer (write) / PerDocValues->DocValues (read)
* By-Default enabled in all codecs except of PreFlex
* Follows other flex-API patterns like non-segment reader throw UOE forcing
MultiPerDocValues if on DirReader etc.
* Integration into IndexWriter, FieldInfos etc.
* Random-testing enabled via RandomIW - injecting random DocValues into
documents
* Basic checks in CheckIndex (which runs after each test)
* FieldComparator for int and float variants (Sorting, currently directly
integrated into SortField, this might go into a separate DocValuesSortField
eventually)
* Extended TestSort for DocValues
* RAM-Resident random access API plus on-disk DocValuesEnum (currently only
sequential access) -> Source.java / DocValuesEnum.java
* Extensible Cache implementation for RAM-Resident DocValues (by-default
loaded into RAM only once and freed once IR is closed) -> SourceCache.java
PS: Currently the RAM resident API is named Source (Source.java) which seems
too generic. I think we should rename it into RamDocValues or something like
that, suggestion welcome!
Any comments, questions (rants :)) are very much appreciated.
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