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--- | ||
tags: | ||
- Community | ||
- Enterprise Standard | ||
- Enterprise Premium | ||
displayed_sidebar: docsEnglish | ||
--- | ||
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# Glossary | ||
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This glossary includes database and distributed-system terms that are often used when using ScalarDB. | ||
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## ACID | ||
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Atomicity, consistency, isolation, and durability (ACID) is a set of properties that ensure database transactions are processed reliably, maintaining integrity even in cases of errors or system failures. | ||
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## concurrency control | ||
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Concurrency control in databases ensures that multiple transactions can occur simultaneously without causing data inconsistency, usually through mechanisms like locking or timestamp ordering. | ||
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## consensus | ||
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Consensus in distributed systems refers to the process of achieving agreement among multiple computers or nodes on a single data value or system state. | ||
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## data federation | ||
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Data federation is the process of integrating data from different sources without moving the data, creating a unified view for querying and analysis. | ||
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## data mesh | ||
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A data mesh is a decentralized data architecture that enables domain teams to independently perform cross-domain analysis, addressing scalability and ownership challenges. | ||
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## data virtualization | ||
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Data virtualization is similar to data federation in many aspects, meaning that it virtualizes multiple data sources into a unified view, simplifying queries without moving the data. | ||
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## database anomalies | ||
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Database anomalies are inconsistencies or errors in data that can occur when operations such as insertions, updates, or deletions are performed without proper transaction management. | ||
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## federation engine | ||
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A federation engine facilitates data integration and querying across multiple disparate data sources, often as part of a data federation architecture. | ||
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## global transaction | ||
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A global transaction spans multiple databases or distributed systems and ensures that all involved systems commit or roll back changes as a single unit. | ||
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## heterogeneous databases | ||
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Heterogeneous databases refer to systems composed of different database technologies that may have distinct data models, query languages, and transaction mechanisms. | ||
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## HTAP | ||
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Hybrid transactional/analytical processing (HTAP) refers to a system that can handle both transactional and analytical workloads concurrently on the same data set, removing the need for separate databases. | ||
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## JDBC | ||
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Java Database Connectivity (JDBC) is an API that allows Java applications to interact with databases, providing methods for querying and updating data in relational databases. | ||
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## linearizability | ||
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Linearizability is a strong consistency model in distributed systems where operations appear to occur atomically in some order, and each operation takes effect between its start and end. | ||
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## NoSQL databases | ||
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NoSQL databases are non-relational databases designed for specific data models, such as document, key-value, wide-column, or graph stores, often used for handling large-scale, distributed data. | ||
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## Paxos | ||
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Paxos is a family of protocols used in distributed systems to achieve consensus, even in the presence of node failures. | ||
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## PITR | ||
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Point-in-time recovery (PITR) allows a database to be restored to a previous state at any specific time, usually after an unintended event like data corruption. | ||
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## polystores | ||
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Polystores are database architectures that allow users to interact with multiple, heterogeneous data stores, each optimized for a specific workload or data type, as if they were a single system. | ||
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## read-committed isolation | ||
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Read-committed isolation is an isolation level where each transaction sees only committed data, preventing dirty reads but allowing non-repeatable reads. | ||
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## relational databases | ||
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Relational databases store data in tables with rows and columns, using a structured query language (SQL) to define, query, and manipulate the data. | ||
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## replication | ||
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Replication in databases involves copying and distributing data across multiple machines or locations to ensure reliability, availability, and fault tolerance. | ||
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## Saga | ||
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The Saga pattern is a method for managing long-running transactions in a distributed system, where each operation in the transaction is followed by a compensating action in case of failure. | ||
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## serializable isolation | ||
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Serializable isolation (serializability) is the highest isolation level in transactional systems, ensuring that the outcome of concurrently executed transactions is the same as if they were executed sequentially. | ||
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## snapshot isolation | ||
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Snapshot isolation is an isolation level that allows transactions to read a consistent snapshot of the database, protecting them from seeing changes made by other transactions until they complete. | ||
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## TCC | ||
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Try-Confirm/Cancel (TCC) is a pattern for distributed transactions that splits an operation into three steps, allowing for coordination and recovery across multiple systems. | ||
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## transaction | ||
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A transaction in databases is a sequence of operations treated as a single logical unit of work, ensuring consistency and integrity, typically conforming to ACID properties. | ||
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## transaction manager | ||
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A transaction manager coordinates the execution of transactions across multiple systems or databases, ensuring that all steps of the transaction succeed or fail as a unit. | ||
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## two-phase commit | ||
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Two-phase commit is a protocol for ensuring all participants in a distributed transaction either commit or roll back the transaction, ensuring consistency across systems. |
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--- | ||
tags: | ||
- Enterprise Option | ||
displayed_sidebar: docsEnglish | ||
--- | ||
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# Monitor ScalarDB by Using Scalar Manager | ||
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tags: | ||
- Community | ||
displayed_sidebar: docsEnglish | ||
--- | ||
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# ScalarDB FDW | ||
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--- | ||
tags: | ||
- Community | ||
displayed_sidebar: docsEnglish | ||
--- | ||
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# Schema Importer | ||
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tags: | ||
- Enterprise Option | ||
- Public Preview | ||
displayed_sidebar: docsEnglish | ||
--- | ||
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# ScalarDB Analytics | ||
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tags: | ||
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displayed_sidebar: docsEnglish | ||
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# ScalarDB Benchmarking Tools | ||
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