Summary: Before this fix compilation with GCC 4.8.5 20150623 (Red Hat 4.8.5-36) would fail with the following error: ``` CC jls/db/db_impl/db_impl.o In file included from ./env/file_system_tracer.h:8:0, from ./file/random_access_file_reader.h:15, from ./file/file_prefetch_buffer.h:15, from ./table/format.h:13, from ./table/internal_iterator.h:14, from ./db/pinned_iterators_manager.h:12, from ./db/range_tombstone_fragmenter.h:15, from ./db/memtable.h:22, from ./db/memtable_list.h:16, from ./db/column_family.h:17, from ./db/db_impl/db_impl.h:22, from db/db_impl/db_impl.cc:9: ./include/rocksdb/file_system.h:108:8: error: unused parameter 'opts' [-Werror=unused-parameter] struct FileOptions : EnvOptions { ^ db/db_impl/db_impl.cc: In member function 'virtual rocksdb::Status rocksdb::DBImpl::SetDBOptions(const std::unordered_map<std::basic_string<char>, std::basic_string<char> >&)': db/db_impl/db_impl.cc:1230:36: note: synthesized method 'rocksdb::FileOptions& rocksdb::FileOptions::operator=(const rocksdb::FileOptions&)' first required here file_options_for_compaction_ = FileOptions(new_db_options); ^ CC jls/db/db_impl/db_impl_compaction_flush.o cc1plus: all warnings being treated as errors make[1]: *** [jls/db/db_impl/db_impl.o] Error 1 make[1]: *** Waiting for unfinished jobs.... make[1]: Leaving directory `/rocksdb-local-build' make: *** [rocksdbjavastatic] Error 2 Makefile:2222: recipe for target 'rocksdbjavastaticdockerarm64v8' failed make: *** [rocksdbjavastaticdockerarm64v8] Error 2 ``` This was detected on both ppc64le and arm64v8, however it does not seem to appear in the same GCC 4.8 version we use for x64 in CircleCI - https://app.circleci.com/pipelines/github/facebook/rocksdb/9691/workflows/c2a94367-14f3-4039-be95-325c34643d41/jobs/227906 Pull Request resolved: https://github.com/facebook/rocksdb/pull/9144 Reviewed By: riversand963 Differential Revision: D32290770 fbshipit-source-id: c90a54ba2a618e1ff3660fff3f3368ab36c3c527 |
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.circleci | ||
.github/workflows | ||
buckifier | ||
build_tools | ||
cache | ||
cmake | ||
coverage | ||
db | ||
db_stress_tool | ||
docs | ||
env | ||
examples | ||
file | ||
fuzz | ||
hdfs | ||
include/rocksdb | ||
java | ||
logging | ||
memory | ||
memtable | ||
microbench | ||
monitoring | ||
options | ||
plugin | ||
port | ||
table | ||
test_util | ||
third-party | ||
tools | ||
trace_replay | ||
util | ||
utilities | ||
.clang-format | ||
.gitignore | ||
.lgtm.yml | ||
.travis.yml | ||
.watchmanconfig | ||
appveyor.yml | ||
AUTHORS | ||
CMakeLists.txt | ||
CODE_OF_CONDUCT.md | ||
CONTRIBUTING.md | ||
COPYING | ||
DEFAULT_OPTIONS_HISTORY.md | ||
defs.bzl | ||
DUMP_FORMAT.md | ||
HISTORY.md | ||
INSTALL.md | ||
issue_template.md | ||
LANGUAGE-BINDINGS.md | ||
LICENSE.Apache | ||
LICENSE.leveldb | ||
Makefile | ||
PLUGINS.md | ||
README.md | ||
ROCKSDB_LITE.md | ||
src.mk | ||
TARGETS | ||
thirdparty.inc | ||
USERS.md | ||
Vagrantfile | ||
WINDOWS_PORT.md |
RocksDB: A Persistent Key-Value Store for Flash and RAM Storage
RocksDB is developed and maintained by Facebook Database Engineering Team. It is built on earlier work on LevelDB by Sanjay Ghemawat (sanjay@google.com) and Jeff Dean (jeff@google.com)
This code is a library that forms the core building block for a fast key-value server, especially suited for storing data on flash drives. It has a Log-Structured-Merge-Database (LSM) design with flexible tradeoffs between Write-Amplification-Factor (WAF), Read-Amplification-Factor (RAF) and Space-Amplification-Factor (SAF). It has multi-threaded compactions, making it especially suitable for storing multiple terabytes of data in a single database.
Start with example usage here: https://github.com/facebook/rocksdb/tree/main/examples
See the github wiki for more explanation.
The public interface is in include/
. Callers should not include or
rely on the details of any other header files in this package. Those
internal APIs may be changed without warning.
Design discussions are conducted in https://www.facebook.com/groups/rocksdb.dev/ and https://rocksdb.slack.com/
License
RocksDB is dual-licensed under both the GPLv2 (found in the COPYING file in the root directory) and Apache 2.0 License (found in the LICENSE.Apache file in the root directory). You may select, at your option, one of the above-listed licenses.