https://github.com/apache/cassandra/pull/2045
https://issues.apache.org/jira/browse/CASSANDRA-8928 This is a work in progress and I am looking for some feedback. This fix appears to work correctly. But I think the placement of the v3 directory is probably not the best and perhaps should be moved under the db/compaction directory where the Downgrader code is. Suggestions appreciated. The changes are: *added* - db/compaction/Downgrader - tools/StandAloneDowngrader - getNextsstableID to ColumnFamilyStore - DOWNGRADE_SSTABLES to OperationType - hasMaxCompressedLength to CompressionMetadata constructor and associated calls. - V3 to SSTableFormat.Type - added io/sstable/format/big/v3 directory containing BigFormatV3, BigTableReaderV3, BitTableScannerV3, BitTableWriterV3 *modified* - CompressionMetadata to skip output of maxCompressedLength if not supported *notes* - io/sstable/format/big/v3 classes are the V3 classes modified as necessary to run within the V4 environment.
