Moving Beyond MapReduce: Using CouchDB Mango for Flexible JSON Queries
Stop writing MapReduce views for every simple query. Learn how to use CouchDB Mango to perform declarative JSON queries with better agility and performance.
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CouchDB MapReduce Views for Pre-Aggregated Indexing
Use CouchDB MapReduce views to pre-aggregate data into B-tree indexes, reducing query-time calculations and avoiding full database scans.
Building Incremental Sync with CouchDB's _changes Feed
CouchDB's _changes feed provides a persistent, sequence‑ordered log for incremental sync. This blog covers feed semantics, filtered replication, a ready‑to‑run polling script, and the trade‑offs (conflicts, compaction, connection limits) you'll encounter in production.
Configure One-Way Continuous CouchDB Replication Using _replicator
Create a _replicator document with continuous:true to sync a source CouchDB database to a target node, then verify via _active_tasks.
Managing Data Conflicts in CouchDB's Append-Only Model
CouchDB's append-only MVCC model prevents data corruption during concurrent writes but requires explicit client-side conflict resolution to avoid data loss.
Using CouchDB’s _changes Feed for Real‑Time Sync in Distributed Apps
Learn how CouchDB’s _changes HTTP feed provides a low‑overhead, long‑polling stream of document revisions that lets multiple clients react instantly to updates, plus how to manage connection costs.
nodejsCouchDB Replication: Engineering Bidirectional Sync Without Custom Queues
CouchDB's _replicator endpoint and MVCC model turn bidirectional sync into a built-in feature. Learn how continuous replication works, where conflicts surface, and what trade-offs to plan for.
CouchDB Mango Indexes: Making _find Fast Without Writing a MapReduce View
Mango JSON selectors are convenient, but unindexed queries scan every document. Declare matching indexes, verify plans with _explain, and use MapReduce views when needed.
CouchDB _rev in Practice: Preventing Lost Updates Without Locking
CouchDB uses immutable MVCC revisions and the _rev parameter to prevent lost updates. Learn the safe update flow, how to retry after a 409, and why replication conflicts require explicit resolution.