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dzone.com /2 days ago

Master-Class: Understanding Database Replication (Single, Multi, and Leaderless)

Replication = same data, multiple nodes. You do it for three reasons: to survive node failures, serve reads from nearby replicas, or spread load. Simple enough. The algorithm you p...

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javacodegeeks.com /1 month ago

Consistent Hashing: The Algorithm That Makes Distributed Caches and Databases Actually Scale

Theory, variants, and where it breaks — from the 1997 Karger et al. paper to virtual nodes in DynamoDB, Cassandra, and Redis Cluster. 1. Why Modular Hashing Fails at Scale Before c...

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aws.amazon.com /3 weeks ago

Amazon Aurora DSQL for global-scale financial transactions

In this post, we first examine why traditional approaches to distributed consistency fall short for financial workloads. We then walk through how the Amazon Aurora DSQL architectur...

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javacodegeeks.com /1 month ago

Beyond CAP: Why the PACELC Model Is a Better Framework for Database Decisions in 2026

CAP is one of the most cited and most misunderstood results in distributed systems. Daniel Abadi’s PACELC model extends it by revealing the tradeoff that CAP completely ignores: ev...

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javacodegeeks.com /1 month ago

CRDTs: The Data Structure That Makes Distributed Consistency Optional and What It Costs

Conflict-free Replicated Data Types let replicas diverge freely and still guarantee eventual convergence. Here is the math behind why that works, a tour of the most useful types, a...

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vmblog.com /2 days ago

EDB Releases PGD 6.4 with Quorum Commit, Bringing True Distributed Consistency to Mission-Critical Postgres

EnterpriseDB (EDB) announced EDB Postgres Distributed (PGD) 6.4, the distributed transactional foundation of EDB Postgres AI.

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dzone.com /1 month ago

Delta Sharing vs Traditional Data Exchange: Secure Collaboration at Scale

Sharing large datasets securely with external partners is a major challenge in modern data engineering. Legacy methods such as transferring files via SFTP or HTTP and building cust...

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dzone.com /1 month ago

Ensuring Data Consistency in Distributed Systems With the Transactional Outbox Pattern

In modern distributed systems, it is common to face the "dual-write" problem. This occurs when a service needs to perform two actions simultaneously: mutate state in a database and...

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sdtimes.com /1 day ago

EDB Releases PGD 6.4 with Quorum Commit, Bringing True Distributed Consistency to Mission-Critical Postgres

WILMINGTON, Del. — EnterpriseDB (EDB), the leading sovereign AI and data company, has announced EDB Postgres Distributed (PGD) 6.4, the distributed transactional foundation of EDB...

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javacodegeeks.com /1 month ago

Apache Seata: Distributed Transaction Management Tutorial

In modern microservices systems, ensuring data consistency across multiple independently deployed services requires a structured approach to distributed transaction management. Let...

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dzone.com /1 month ago

When Kubernetes Breaks Session Consistency: Using Cosmos DB and Redis Together

Distributed systems rarely struggle because of storage engines. They struggle because of coordination. We were operating a high-throughput microservice on Kubernetes backed by Azur...

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dzone.com /1 month ago

DocumentDB on Kubernetes

DocumentDB is an open-source MongoDB-compatible database built on PostgreSQL that provides a familiar interface while leveraging PostgreSQL's reliability and extensibility. The Doc...

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dzone.com /1 month ago

When Events Move Faster Than Your Database: A Resilient Design Pattern

Event-driven systems are designed for speed, scalability, and decoupling. Messages flow rapidly between services, consumers react almost instantly, and systems can evolve independe...

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dzone.com /2 weeks ago

Lease Coordination Under Serializable Isolation in CockroachDB

Multi-region systems that rely on entity-scoped write coordination often reach a scale where correctness is no longer the primary challenge; predictability under sustained concurre...

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dev.to /1 week ago

GBase 8a Data Sync in Practice: T+1 Replication, Real‑Time Mirroring, and Write‑Once‑Read‑Many

Data synchronization in GBase 8a isn't just "primary‑standby replication." Different business requirements — real‑time, disaster recovery, read/write splitting — lead to completely...

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dzone.com /1 month ago

Clock Synchronization and Ordering Events in Distributed Systems: Lamport Clocks vs. Vector Clocks

Building distributed systems teaches you many lessons, but few are as counterintuitive as this: the clock on your machine is lying to you. The assumption that you can look at two e...

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cloud.google.com /1 month ago

What’s new with Databases: Powering the agentic future

In the agentic era, the role of enterprise data is shifting from a passive resource to a dynamic System of Action. That’s why we announced the Agentic Data Cloud — a unified archit...

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dzone.com /1 month ago

When One Giant Payload Must Serve Many Small Consumers: Designing a Scalable Fanout Service

In distributed systems, size is rarely just a number. A producer may generate a rich, hierarchical product object containing items, SKUs, GTINs, variants, attributes, and region-sp...

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dzone.com /4 weeks ago

Bucket4j + Infinispan: A Deep Dive Into Implementation

In distributed systems, the biggest challenge for rate limiting is state. How do you ensure that two parallel requests hitting different cluster nodes don't "double-spend" the same...

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aws.amazon.com /1 week ago

Introducing ExtendDB: An open source DynamoDB-compatible adapter with pluggable storage backends

Today, we are announcing ExtendDB, an open source Amazon DynamoDB-compatible adapter with pluggable storage backends, released under the Apache 2.0 License. ExtendDB implements the...

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habr.com /1 month ago

SPQR в финтехе: реальная миграция на шардированную PostgreSQL-инсталляцию

На связи Денис Волков из команды платформы данных в Yandex Cloud. В предыдущей статье мы рассказали, как устроен SPQR (Stateless Postgres Query Router): архитектура, компоненты и п...

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javacodegeeks.com /4 weeks ago

Building Read-Write Database Routing in Spring Boot with JPA

Enterprise applications often require the separation of database workloads to improve performance and scalability. Read operations can be directed to replica databases while a prim...

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habr.com /1 month ago

Распределенное KV-хранилище на базе etcd

Я постараюсь, не углубляясь в технические дебри, в научно-популярном ключе рассказать о распределенных KV-хранилищах: что это вообще такое, где применяется и почему мы выбрали имен...

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dzone.com /1 month ago

The Myth of Horizontal Scalability

There's a particular kind of confidence that sets in after you've watched Kubernetes spin up a dozen fresh pods in under a minute. You've done the work. You've containerized everyt...

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