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https://issues.apache.org/jira/browse/HBASE-30321?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Charles Connell reassigned HBASE-30321:
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Assignee: Saad Ahmad Sabri
> Implement GzipByteBuffDecompressor with on-heap and off-heap decompression
> paths
> --------------------------------------------------------------------------------
>
> Key: HBASE-30321
> URL: https://issues.apache.org/jira/browse/HBASE-30321
> Project: HBase
> Issue Type: Improvement
> Reporter: Saad Ahmad Sabri
> Assignee: Saad Ahmad Sabri
> Priority: Major
>
> Add GzipByteBuffDecompressor, a ByteBuffDecompressor implementation that
> enables GZIP
> decompression directly from/to ByteBuffer objects without intermediate byte
> array copies.
> Two decompression paths are supported:
> - Off-heap (direct ByteBuffer): delegates to Hadoop's native
> ZlibDirectDecompressor with
> GZIP_FORMAT when native zlib is loaded
> - On-heap (heap ByteBuffer): falls back to Java's Inflater in raw DEFLATE
> (nowrap) mode,
> manually skipping the GZIP header and verifying the CRC32 and ISIZE trailer
> fields
> Also adds GzipHFileDecompressionContext to carry per-block configuration, and
> input-length validation to reject inputs too short to be a valid GZIP member.
> The prior code had no ByteBuff-based GZIP decompression path, requiring byte
> array
> copies for on-heap scenarios. This eliminates those copies for both direct
> and heap
> buffer cases.
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