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https://issues.apache.org/jira/browse/HBASE-18232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16062847#comment-16062847
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Anastasia Braginsky commented on HBASE-18232:
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+*Design points:*+
# The variable size chunks are designed *only to hold one cell*, whose size is
bigger than regular size of the chunk. This is for the case when cell must be
allocated on a chunk as in case with CellChunkMap.
# The case when variable size chunk is allocated *should be rare*. If the
majority of the cells is requiring variable size chunks, just increase the
regular size of the chunks.
# Variable size chunks are *allocated and deallocated on demand* and are not
going to be part of the chunk pool.
# Variable size chunks *only support immutable chunks*, meaning they are
allocated at the background as part of flattening, merging or compaction and
not as part of the user write request. Thus their expensive allocation is less
painful.
> Add variable size chunks to the MSLAB
> -------------------------------------
>
> Key: HBASE-18232
> URL: https://issues.apache.org/jira/browse/HBASE-18232
> Project: HBase
> Issue Type: Sub-task
> Reporter: Anastasia Braginsky
>
> Add possibility to create a variable size chunks of memory, so any cell (of
> any size) can reside on a chunk.
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