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Update HISTORY.md

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Wanning Jiang 2016-08-09 21:12:45 -07:00 committed by GitHub
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* enum type CompressionType and PerfLevel changes from char to unsigned char. Value of all PerfLevel shift by one.
* Deprecate options.filter_deletes.
* options.memtable_prefix_bloom_huge_page_tlb_size => memtable_huge_page_size. When it is set, RocksDB will try to allocate memory from huge page for memtable too, rather than just memtable bloom filter.
* Options file is in backup now. After restore, you can load options file and reuse it.
### New Features
* Add avoid_flush_during_recovery option.
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* RepairDB support for column families. RepairDB now associates data with non-default column families using information embedded in the SST/WAL files (4.7 or later). For data written by 4.6 or earlier, RepairDB associates it with the default column family.
* Add options.write_buffer_manager which allows users to control total memtable sizes across multiple DB instances.
* A tool to migrate DB after options change. See include/rocksdb/utilities/option_change_migration.h.
* Options file is in backup now. After restore, you can load options file and reuse it.
## 4.9.0 (6/9/2016)
### Public API changes