ElasticSearch

Distributed Document Storehttp://elastic.openthinklabs.com/

Routing a Document to a Shard

shard = hash(routing) % number_of_primary_shards

How Primary and Replica Shards Interact

A cluster with three nodes and one index

When sending requests, it is good practice to round-robin through all the nodes in the cluster, in order to spread the load.

Creating, Indexing, and Deleting a Document

consistency

int( (primary + number_of_replicas) / 2 ) + 1

int( (primary + 3 replicas) / 2 ) + 1 = 3

quorum

Creating, indexing, or deleting a single document

Retrieving a Document

Retrieving a single document

Partial Updates to a Document

Partial updates to a document

Multidocument Patterns

Retrieving multiple documents with mget

Multiple document changes with bulk

Referensi

● ElasticSearch, The Definitive Guide, A Distributed Real-Time Search and Analytics Engine, Clinton Gormely & Zachary Tong, O’Reilly