google/leveldb

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LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.

Stars: 39.4k
Forks: 8.2k
Open beginner issues: 0
Indexed issues: 260

Dominant language: C++
License: BSD-3-Clause
Last GitHub push: Mar 11, 2026
Latest indexed: Sep 16, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted
PR merge metrics: No merged PRs in 30d

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260 open issues indexed

minor correction to project home page (re sync time) Open

enhancement

google/leveldb#62 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Mutate and append to value support Open

enhancement

google/leveldb#71 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add a Get API which allows for caller-allocated result buffer storage ( e.g. on stack ) Open

enhancement

google/leveldb#141 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Assertion Failure When Closing Database Open

bug

google/leveldb#142 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
PosixMmapFile which using ftruncate+mmap may crash on Append() while the disk have no enough space Open

bug

google/leveldb#150 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
port_win.cc: deadlock in CondVar::SignalAll Open

bug

google/leveldb#155 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Deleted entries don't get compacted. Open

bug

google/leveldb#164 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
leveldb writes blocks occassionarily Open

bug enhancement

google/leveldb#170 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Improper condition test in FilterBlockReader::KeyMayMatch Open

bug

google/leveldb#171 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
[Feature Required] Compaction read/write speed limit Open

enhancement

google/leveldb#174 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Leveldb keeps generating small sst file Open

question

google/leveldb#175 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
PosixSequentialFile::Skip(uint64_t n) Open

bug

google/leveldb#179 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
My implementation: Compaction IO speed limitation Open

enhancement

google/leveldb#185 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Possible bug: Missing a fsync() or msync() call after creating MANIFEST-000001 Open

bug

google/leveldb#189 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Possible bug: Missing a fsync() on the ".log" file before compaction Open

bug

google/leveldb#193 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Possible bug: fsync() required after calling rename() Open

bug

google/leveldb#195 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Isssue 178 patch:Compaction causes previously deleted value to reappear Open

bug

google/leveldb#205 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Random never return 0 Open

bug

google/leveldb#208 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Mattew from BOSHO about LEVELDB hickuips and performance Open

enhancement

google/leveldb#212 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
DestroyDB() doesn't remove .ldb files Open

bug

google/leveldb#214 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Invalid options range calcultion function Open

bug

google/leveldb#219 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
CompactRange() does not fully compact after WriteBatch is written Open

bug

google/leveldb#227 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Tunable allowed_seeks - feature request Open

enhancement

google/leveldb#229 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
memory increasing when using LRUCache in different threads Open

bug

google/leveldb#231 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
leveldb core dump Open

bug

google/leveldb#232 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Prevent snappy and tcmalloc detection Open

enhancement

google/leveldb#234 · 0 comments · 6 reactions · 0 assignees · Indexed Sep 16, 2026
Allow clients to set maximum number of memory mapped files Open

enhancement

google/leveldb#238 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Benchmark additions and enhancements Open

enhancement

google/leveldb#244 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Possible bug: After a power-loss, LevelDB does not discard partially-flushed transactions Open

bug

google/leveldb#251 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Why not keep memtable in recover? Open

question

google/leveldb#270 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
a new strategy to triple the write speed of LevelDB Open

enhancement

google/leveldb#298 · 7 comments · 2 reactions · 0 assignees · Indexed Sep 16, 2026
MANIFEST file grows forever if the DB is not closed and re-opened Open

enhancement

google/leveldb#299 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Why usage_ in LRUCache::Insert from cache.cc just add charge? Open

question

google/leveldb#327 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
LevelDB PUT sometimes lock Open

question

google/leveldb#334 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Question about exception safety Open

bug question

google/leveldb#335 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Filter name key is not an internal key? Open

question

google/leveldb#342 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
why not use a immutable vector? Open

question

google/leveldb#398 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
when we do memtable dump, split memtable into different files with range Open

enhancement

google/leveldb#405 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Local variable tests in util/testharness.cc may not have been deallocated? Open

bug

google/leveldb#407 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
not an sstable (bad magic number) Open

bug

google/leveldb#408 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
RES consistently increasing while using leveldb Open

google/leveldb#420 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
SQLite benchmarks are completely WRONG Open

bug

google/leveldb#421 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 16, 2026
Segfault in createFilter() Open

bug

google/leveldb#425 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
skiplist synchronization question Open

question

google/leveldb#428 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
leveldb minimize compilation dependicies design Open

question

google/leveldb#436 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Why the write amplification of LevelDB smaller than the logical value? Open

question

google/leveldb#437 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
How can I config the max_file_size and enable it work well? Open

question

google/leveldb#438 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
leveldb::port::CondVar::Wait for a long time Open

question

google/leveldb#444 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
overflow bug in SanitizeOptions Open

bug

google/leveldb#462 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Cocoapods support Open

enhancement

google/leveldb#470 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026

google/leveldb

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