OpenAsSecondary:同样返回只读的DB,但可以通过TryCatchUpWithPrimary()来进行动态追赶。注意参数中包含primary的路径(name)以及secondary的info log目录路径(secondary_path): 主实例在辅助实例启动后创建的列族目前会被辅助实例忽略。 由辅助实例打开但被主实例删除的列族也会被辅助实例删除(在下次调用 TryCatchUpWithPr...
secondary_path参数指向从节点存储其信息日志的目录。 dbptr是与打开的从节点相对应的out-arg【外部指针】该指针指向一个堆中数据库,用户应在使用后将其删除。 目前不支持WAL追踪【实时从节点】,但很快就会有。 OpenAsSecondary上面的方式会以默认列族打开,而这个会指定列族的方式打开从节点,多了一个参数就是column...
这可以通过使用调用打开数据库来完成。DB::OpenAsSecondary()DB::OpenForReadOnly() 问:当另一个线程发出读取、写入或手动压缩请求时关闭 RocksDB 是否安全? 答:没有。RocksDB 的用户在关闭 RocksDB 之前需要确保所有功能都已完成。您可以通过致电来加快等待速度。CancelAllBackgroundWork() 问:支持的最大键和值...
├── db_impl_files.cc ├── db_impl_open.cc ├── db_impl_readonly.cc ├── db_impl_readonly.h ├── db_impl_secondary.cc ├── db_impl_secondary.h ├── db_impl_write.cc └── db_secondary_test.cc 示意类图如下: 3.2. Put流程 函数声明: // db/db_impl/db_impl.h ...
basic open/put/get/delete/close open as secondary instance destroy/repair iterator iterator with specific prefix write batch options open options read options write options Install pip install rocksdb3 Examples importrocksdb3path='./db_path'db=rocksdb3.open_default(path)assertdb.get(b'my key')...
A: No. However, it can be opened using Secondary DB. If no write goes to the database, it can be opened in read-only mode from multiple processes. Q: Does RocksDB support multi-process read access? A: Yes, you can read it using secondary database usingDB::OpenAsSecondary(). Rocks...
DescriptionEmbeddable persistent key-value store optimized for fast storage (flash and RAM)Atime series DBMSoptimized for fast ingest and complex queries, based onPostgreSQL Primary database modelKey-value storeTime Series DBMS Secondary database modelsRelational DBMS ...
RocksDB borrows significant code from the open source leveldb project as well as ideas from Apache HBase. The initial code was forked from open source leveldb 1.5. It also builds upon code and ideas that were developed at Facebook before RocksDB. ...
db/db_impl/db_impl_open.cc \ db/db_impl/db_impl_readonly.cc \ db/db_impl/db_impl_secondary.cc \ db/db_impl/db_impl_write.cc \ db/db_info_dumper.cc \ db/db_iter.cc \ db/dbformat.cc \ db/error_handler.cc \ db/event_helpers.cc \ db/experimental.cc \ db...
A: Yes, you can read it using secondary database usingDB::OpenAsSecondary(). RocksDB can also support multi-process read only process without writing the database. This can be done by opening the database withDB::OpenForReadOnly()call. ...