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Features Not in LevelDB · facebook/rocksdb Wiki · GitHub
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Features Not in LevelDB
Siying Dong edited this page Mar 3, 2020
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12 revisions
We stopped maintaining this page since 2016. New features are not added to the lists.
- Multithread compaction
- Multithread memtable inserts
- Reduced DB mutex holding
- Optimized level-based compaction style and universal compaction style
- Prefix bloom filter
- Memtable bloom filter
- Single bloom filter covering the whole SST file
- Write lock optimization
- Improved Iter::Prev() performance
- Fewer comparator calls during SkipList searches
- Allocate memtable memory using huge page.
- Column Families
- Transactions and WriteBatchWithIndex
- Backup and Checkpoints
- Merge Operators
- Compaction Filters
- RocksDB Java
- Manual Compactions Run in Parallel with Automatic Compactions
- Persistent Cache
- Bulk loading
- Forward Iterators/ Tailing iterator
- Single delete
- Delete files in range
- Pin iterator key/value
- Plain Table format for memory-only use cases
- Vector-based and hash-based memtable format
- Clock-based cache (coming soon)
- Pluggable information log
- Annotate transaction log write with blob (for replication)
- Rate limiting
- Tunable Slowdown and Stop threshold
- Option to keep all files open
- Option to keep all index and bloom filter blocks in block cache
- Multiple WAL recovery modes
- Fadvise hints for readahead and to avoid caching in OS page cache
- Option to pin indexes and bloom filters of L0 files in memory
- More Compression Types: zlib, lz4, zstd
- Compression Dictionary
- Checksum Type: xxhash
- Different level size multiplier and compression type for each level.
- Statistics
- Thread-local profiling
- More commands in command-line tools
- User-defined table properties
- Event listeners
- More DB Properties
- Dynamic option changes
- Get options from a string or map
- Persistent options to option files
Contents
- RocksDB Wiki
- Overview
- RocksDB FAQ
- Terminology
- Requirements
- Contributors' Guide
- Release Methodology
- RocksDB Users and Use Cases
- RocksDB Public Communication and Information Channels
-
Basic Operations
- Iterator
- Prefix seek
- SeekForPrev
- Tailing Iterator
- Compaction Filter
- Multi Column Family Iterator
- Read-Modify-Write (Merge) Operator
- Column Families
- Creating and Ingesting SST files
- Single Delete
- Low Priority Write
- Time to Live (TTL) Support
- Transactions
- Snapshot
- DeleteRange
- Atomic flush
- Read-only and Secondary instances
- Approximate Size
- User-defined Timestamp
- Wide Columns
- BlobDB
- Online Verification
- Options
- MemTable
- Journal
- Cache
- Write Buffer Manager
- Compaction
- SST File Formats
- IO
- Compression
- Full File Checksum and Checksum Handoff
- Background Error Handling
- Huge Page TLB Support
- Tiered Storage (Experimental)
- Logging and Monitoring
- Known Issues
- Troubleshooting Guide
- Tests
- Tools / Utilities
-
Implementation Details
- Delete Stale Files
- Partitioned Index/Filters
- WritePrepared-Transactions
- WriteUnprepared-Transactions
- How we keep track of live SST files
- How we index SST
- Merge Operator Implementation
- RocksDB Repairer
- Write Batch With Index
- Two Phase Commit
- Iterator's Implementation
- Simulation Cache
- [To Be Deprecated] Persistent Read Cache
- DeleteRange Implementation
- unordered_write
- Extending RocksDB
- RocksJava
- Lua
- Performance
- Projects Being Developed
- Misc
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