fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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ryneli 663afef884 Add EnvLibrados - RocksDB Env of RADOS (#1222) ... EnvLibrados is a customized RocksDB Env to use RADOS as the backend file system of RocksDB. It overrides all file system related API of default Env. The easiest way to use it is just like following: std::string db_name = "test_db"; std::string config_path = "path/to/ceph/config"; DB* db; Options options; options.env = EnvLibrados(db_name, config_path); Status s = DB::Open(options, kDBPath, &db); Then EnvLibrados will forward all file read/write operation to the RADOS cluster assigned by config_path. Default pool is db_name+"_pool". There are some options that users could set for EnvLibrados. - write_buffer_size. This variable is the max buffer size for WritableFile. After reaching the buffer_max_size, EnvLibrados will sync buffer content to RADOS, then clear buffer. - db_pool. Rather than using default pool, users could set their own db pool name - wal_dir. The dir for WAL files. Because RocksDB only has 2-level structure (dir_name/file_name), the format of wal_dir is "/dir_name"(CAN'T be "/dir1/dir2"). Default wal_dir is "/wal". - wal_pool. Corresponding pool name for WAL files. Default value is db_name+"_wal_pool" The example of setting options looks like following: db_name = "test_db"; db_pool = db_name+"_pool"; wal_dir = "/wal"; wal_pool = db_name+"_wal_pool"; write_buffer_size = 1 << 20; env_ = new EnvLibrados(db_name, config, db_pool, wal_dir, wal_pool, write_buffer_size); DB* db; Options options; options.env = env_; // The last level dir name should match the dir name in prefix_pool_map options.wal_dir = "/tmp/wal"; // open DB Status s = DB::Open(options, kDBPath, &db); Librados is required to compile EnvLibrados. Then use "$make LIBRADOS=1" to compile RocksDB. If you want to only compile EnvLibrados test, just run "$ make env_librados_test LIBRADOS=1". To run env_librados_test, you need to have a running RADOS cluster with the configure file located in "../ceph/src/ceph.conf" related to "rocksdb/".		9 years ago
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backupable	Add comment for GetBackupInfo about returned BackupInfos order	9 years ago
checkpoint	Backup Options	9 years ago
compaction_filters	Updated all copyright headers to the new format.	9 years ago
convenience	Updated all copyright headers to the new format.	9 years ago
document	Alpine Linux Build (#990)	9 years ago
flashcache	Updated all copyright headers to the new format.	9 years ago
geodb	Updated all copyright headers to the new format.	9 years ago
leveldb_options	Updated all copyright headers to the new format.	9 years ago
memory	Temporarily disable unstable tests in memory_test.cc	9 years ago
merge_operators	Introduce FullMergeV2 (eliminate memcpy from merge operators)	9 years ago
options	Only cache level 0 indexes and filter when opening table reader	9 years ago
persistent_cache	Build break fix	9 years ago
redis	Eliminate use of 'using namespace std'. Also remove a number of ADL references to std functions.	9 years ago
simulator_cache	Remove %z Format Specifier and Fix Windows Build of sim_cache.cc (#1224)	9 years ago
spatialdb	fix wrong assignment of level0_stop_writes_trigger in spatialdb (#1061)	9 years ago
table_properties_collectors	Updated all copyright headers to the new format.	9 years ago
transactions	delete unnessary pointer cast in beginInternalTransaction() function	9 years ago
ttl	Introduce FullMergeV2 (eliminate memcpy from merge operators)	9 years ago
write_batch_with_index	Fix clang analyzer errors	9 years ago
env_librados.cc	Add EnvLibrados - RocksDB Env of RADOS (#1222)	9 years ago
env_librados.md	Add EnvLibrados - RocksDB Env of RADOS (#1222)	9 years ago
env_librados_test.cc	Add EnvLibrados - RocksDB Env of RADOS (#1222)	9 years ago
env_mirror.cc	Fix warning in release	9 years ago
env_mirror_test.cc	env: add EnvMirror	9 years ago
env_registry.cc	Env registry for URI-based Env selection [pluggable Env part 1]	9 years ago
env_registry_test.cc	Env registry for URI-based Env selection [pluggable Env part 1]	9 years ago
merge_operators.h	Introduce FullMergeV2 (eliminate memcpy from merge operators)	9 years ago
util_merge_operators_test.cc	Introduce FullMergeV2 (eliminate memcpy from merge operators)	9 years ago