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pavan-kalyan.dev | ||
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pgdba.org
[AI summary] This technical article explains the Multi-Version Concurrency Control (MVCC) and transaction isolation levels in PostgreSQL, including how XIDs work and common concurrency issues. |
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jepsen.io
[AI summary] This article explains the concepts, mechanics, exceptions, and comparisons of snapshot isolation within database transactional systems. |
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martin.kleppmann.com
[AI summary] The author explains the confusion surrounding database transaction isolation levels, analyzes inconsistencies across major databases, and introduces Hermitage, a new test suite designed to rigorously compare these guarantees. |
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blog.nuculabs.de
Introduction Apache Cassandra is a highly scalable and distributed NoSQL database that is designed to handle large volumes of data across multiple commodity servers. One of the key features of Cassandra is its ability to automatically manage data distribution, replication, and consistency across a cluster of nodes, providing high availability and fault tolerance. One important aspect of managing data in Cassandra is compaction. Compaction is the process of merging and removing unnecessary data from SSTables, which are the on-disk storage structures used by Cassandra. Over time, as data is written and deleted, SSTables can become fragmented and inefficient, which can impact performance and consume valuable disk space. Compaction helps to optimize the storage ... |
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