General Q&A series:
Q: What is RockSack?
A: RockSack is a Java library that provides an object oriented system for storing and retrieving data in a efficient and scalable manner.
Q: What is the main purpose of RockSack?
A: The main purpose of RockSack is to provide a simple and efficient way to store and retrieve data in an object oriented database, with support for transactions and buffering for improved performance.
Q: Is RockSack a Key/Value Store like RocksDB?
A: Yes, and more! RockSack functions more as a TreeMap, using Java methods to allow the user to retrieve ordered subsets based on keys and/or values.
Q: What is a BufferedMap in RockSack?
A: A BufferedMap is a class in RockSack that provides a buffered mapping of keys to objects, allowing for efficient storage and retrieval of data.
Q: What is the difference between a BufferedMap and a TransactionalMap?
A: A BufferedMap is a non-transactional map that stores data in a cache before writing it to the underlying database, while a TransactionalMap is a transactional map that supports atomic updates to the database.
Q: How do I use RockSack to store and retrieve data?
A: To use RockSack, you can create a BufferedMap or TransactionalMap instance and use the put, get, and remove methods to store and retrieve data.
Q: What is a TransactionId in RockSack?
A: A TransactionId is a unique identifier for a transaction in RockSack, used to manage transactions and ensure data consistency.
Q: How do I manage transactions in RockSack?
A: You can manage transactions in RockSack by using the TransactionManager class, which provides methods for starting, committing, and rolling back transactions.
Q: How is RockSack different from RocksDB?
A: RocksDB just works with raw bytes, RockSack leverages RocksDB to work with first class Java classes and data and use their methods for ordering.
Q: How do I configure RockSack to use a specific database or volume?
A: You can configure RockSack to use a specific database or volume by using the DatabaseManager class, which provides methods for setting the database or volume name and path.
Q: What is the difference between a database and a volume in RockSack?
A: A database in RockSack refers to a collection of key-value pairs stored in a specific location, while a volume refers to a physical storage location for the database.
Q: How do I optimize the performance of RockSack?
A: You can optimize the performance of RockSack by adjusting the buffer size, cache size, and other configuration parameters to suit your specific use case.
Q: Is RockSack thread-safe?
A: Yes, RockSack is designed to be thread-safe, with built-in support for concurrent access and updates to the key-value store.
Q: What is the licensing model for RockSack?
A: RockSack is open-source software, licensed under the Apache License, Version 2.0.
Q: Where can I find more information about RockSack?
A: You can find more information about RocksDB on the Meta RocksDB website; https://rocksdb.org/ including documentation, tutorials, and community forums.
Q: What is the purpose of the DatabaseManager class?
A: The DatabaseManager class is the central component of RockSack, responsible for managing database connections, transactions, and maps.
Q: How do I create a new transaction in RockSack?
A: You can create a new transaction in RockSack by calling the `beginTransaction()` method on the DatabaseManager instance, or by using the `startTransaction()` method on a specific map or class.
Q: What is the difference between a TransactionSession and a TransactionSessionAlias?
A: A TransactionSession is a basic transaction session, while a TransactionSessionAlias is a transaction session that is associated with a specific alias (database path).
Q: How do I remove a transaction from RockSack?
A: You can remove a transaction from RockSack by calling the `removeTransaction()` method on the DatabaseManager instance, passing in the transaction ID.
Q: What is the purpose of the VolumeManager class?
A: The VolumeManager class is responsible for managing the tablespace (database path) for RockSack, including setting and getting the default tablespace and alias-specific tablespaces.
Q: How do I set the RocksDB options for my RockSack database?
A: You can set the RocksDB options for your RockSack database by calling the `setDatabaseOptions()` method on the DatabaseManager instance, passing in a RocksDB Options object.
Q: Can I use RockSack with multiple databases?
A: Yes, RockSack supports multiple databases through the use of aliases (database paths). You can create multiple aliases and switch between them using the `setTableSpaceDir()` method.
Q: What is the purpose of the TransactionId class?
A: The TransactionId class represents a unique transaction ID, which is used to identify and manage transactions in RockSack.
Q: How do I get a map from RockSack?
A: You can get a map from RockSack by calling the `getMap()` method on the DatabaseManager instance, passing in a class or comparable instance.
Q: Can I use RockSack with Java 8 streams?
A: Yes, RockSack provides support for Java 8 streams through the `stream()` method on maps and transactional maps.
Q: How do I rollback a transaction in RockSack?
A: You can rollback a transaction in RockSack by calling the `rollbackTransaction()` method on the DatabaseManager instance, passing in the transaction ID.
Q: What is the purpose of the ClassTool class?
A: The ClassTool class is a utility class that provides methods for generating and manipulating class names and comparable instances for use with RockSack.
Q: What is the purpose of the DatabaseManager class?
A: The DatabaseManager class is the central component of RockSack, responsible for managing database connections, transactions, and maps.
Q: How do I create a new transaction in RockSack?
A: You can create a new transaction in RockSack by calling the `beginTransaction()` method on the DatabaseManager instance, or by using the `startTransaction()` method on a specific map or class.
Q: What is the difference between a TransactionSession and a TransactionSessionAlias?
A: A TransactionSession is a basic transaction session, while a TransactionSessionAlias is a transaction session that is associated with a specific alias (database path).
Q: How do I remove a transaction from RockSack?
A: You can remove a transaction from RockSack by calling the `removeTransaction()` method on the DatabaseManager instance, passing in the transaction ID.
Q: What is the purpose of the VolumeManager class?
A: The VolumeManager class is responsible for managing the tablespace (database path) for RockSack, including setting and getting the default tablespace and alias-specific tablespaces.
Q: How do I set the RocksDB options for my RockSack database?
A: You can set the RocksDB options for your RockSack database by calling the `setDatabaseOptions()` method on the DatabaseManager instance, passing in a RocksDB Options object.
Q: Can I use RockSack with multiple databases?
A: Yes, RockSack supports multiple databases through the use of aliases (database paths). You can create multiple aliases and switch between them using the `setTableSpaceDir()` method.
Q: Can I use RockSack with Java 8 streams?
A: Yes, RockSack provides support for Java 8 streams through the `stream()` method on maps and transactional maps.
Q: How do I rollback a transaction in RockSack?
A: You can rollback a transaction in RockSack by calling the `rollbackTransaction()` method on the DatabaseManager instance, passing in the transaction ID.
Q: What is the purpose of the DatabaseManager class?
A: The DatabaseManager class is the central component of RockSack, responsible for managing database connections, transactions, and maps.
Q: What is the difference between a TransactionSession and a TransactionSessionAlias?
A: A TransactionSession is a basic transaction session, while a TransactionSessionAlias is a transaction session that is associated with a specific alias (database path).
Q: How do I remove a transaction from RockSack?
A: You can remove a transaction from RockSack by calling the `removeTransaction()` method on the DatabaseManager instance, passing in the transaction ID.
Q: How do I set the RocksDB options for my RockSack database?
A: You can set the RocksDB options for your RockSack database by calling the `setDatabaseOptions()` method on the DatabaseManager instance, passing in a RocksDB Options object.
Q: Can I use RockSack with multiple databases?
A: Yes, RockSack supports multiple databases through the use of aliases (database paths). You can create multiple aliases and switch between them using the `setTableSpaceDir()` method.
Q: What is the purpose of the TransactionId class?
A: The TransactionId class represents a unique transaction ID, which is used to identify and manage transactions in RockSack.
Q: How do I get a map from RockSack?
A: You can get a map from RockSack by calling the `getMap()` method on the DatabaseManager instance, passing in a class or comparable instance.
Q: Can I use RockSack with Java 8 streams?
A: Yes, RockSack provides support for Java 8 streams through the `stream()` method on maps and transactional maps.
Q: How do I rollback a transaction in RockSack?
A: You can rollback a transaction in RockSack by calling the `rollbackTransaction()` method on the DatabaseManager instance, passing in the transaction ID.