LogoLogo
Studio
4.4
4.4
  • Harper Docs
  • Getting Started
  • Developers
    • Applications
      • Caching
      • Defining Schemas
      • Defining Roles
      • Debugging Applications
      • Define Fastify Routes
      • Web Applications
      • Example Projects
    • Components
      • Managing
      • Reference
      • Built-In Components
    • REST
    • Operations API
      • Quick Start Examples
      • Databases and Tables
      • NoSQL Operations
      • Bulk Operations
      • Users and Roles
      • Clustering
        • Clustering with NATS
      • Custom Functions
      • Components
      • Registration
      • Jobs
      • Logs
      • Utilities
      • Token Authentication
      • SQL Operations
      • Advanced JSON SQL Examples
    • Real-Time
    • Replication/Clustering
      • Sharding
      • Legacy NATS Clustering
        • Requirements and Definitions
        • Creating A Cluster User
        • Naming A Node
        • Enabling Clustering
        • Establishing Routes
        • Subscription Overview
        • Managing Subscriptions
        • Things Worth Knowing
        • Certificate Management
    • Security
      • JWT Authentication
      • Basic Authentication
      • mTLS Authentication
      • Configuration
      • Users & Roles
      • Certificate Management
    • SQL Guide
      • SQL Features Matrix
      • SQL Date Functions
      • SQL Reserved Word
      • SQL Functions
      • SQL JSON Search
      • SQL Geospatial Functions
    • Miscellaneous
      • Google Data Studio
      • SDKs
      • Query Optimization
  • Administration
    • Best Practices and Recommendations
    • Logging
      • Standard Logging
      • Audit Logging
      • Transaction Logging
    • Clone Node
    • Compact
    • Jobs
    • Harper Studio
      • Create an Account
      • Log In & Password Reset
      • Organizations
      • Instances
      • Manage Databases / Browse Data
      • Manage Clustering
      • Manage Instance Users
      • Manage Instance Roles
      • Manage Applications
      • Instance Metrics
      • Instance Configuration
      • Enable Mixed Content
  • Deployments
    • Configuration File
    • Harper CLI
    • Install Harper
      • On Linux
    • Upgrade a Harper Instance
    • Harper Cloud
      • IOPS Impact on Performance
      • Instance Size Hardware Specs
      • Alarms
      • Verizon 5G Wavelength
  • Technical Details
    • Reference
      • Analytics
      • Architecture
      • Content Types
      • Data Types
      • Dynamic Schema
      • GraphQL
      • Harper Headers
      • Harper Limits
      • Globals
      • Resource Class
      • Transactions
      • Storage Algorithm
    • Release Notes
      • Harper Tucker (Version 4)
        • 4.4.24
        • 4.4.23
        • 4.4.22
        • 4.4.21
        • 4.4.20
        • 4.4.19
        • 4.4.18
        • 4.4.17
        • 4.4.16
        • 4.4.15
        • 4.4.14
        • 4.4.13
        • 4.4.12
        • 4.4.11
        • 4.4.10
        • 4.4.9
        • 4.4.8
        • 4.4.7
        • 4.4.6
        • 4.4.5
        • 4.4.4
        • 4.4.3
        • 4.4.2
        • 4.4.1
        • 4.4.0
        • 4.3.38
        • 4.3.37
        • 4.3.36
        • 4.3.35
        • 4.3.34
        • 4.3.33
        • 4.3.32
        • 4.3.31
        • 4.3.30
        • 4.3.29
        • 4.3.28
        • 4.3.27
        • 4.3.26
        • 4.3.25
        • 4.3.24
        • 4.3.23
        • 4.3.22
        • 4.3.21
        • 4.3.20
        • 4.3.19
        • 4.3.18
        • 4.3.17
        • 4.3.16
        • 4.3.15
        • 4.3.14
        • 4.3.13
        • 4.3.12
        • 4.3.11
        • 4.3.10
        • 4.3.9
        • 4.3.8
        • 4.3.7
        • 4.3.6
        • 4.3.5
        • 4.3.4
        • 4.3.3
        • 4.3.2
        • 4.3.1
        • 4.3.0
        • 4.2.8
        • 4.2.7
        • 4.2.6
        • 4.2.5
        • 4.2.4
        • 4.2.3
        • 4.2.2
        • 4.2.1
        • 4.2.0
        • 4.1.2
        • 4.1.1
        • 4.1.0
        • 4.0.7
        • 4.0.6
        • 4.0.5
        • 4.0.4
        • 4.0.3
        • 4.0.2
        • 4.0.1
        • 4.0.0
        • Tucker
      • HarperDB Monkey (Version 3)
        • 3.3.0
        • 3.2.1
        • 3.2.0
        • 3.1.5
        • 3.1.4
        • 3.1.3
        • 3.1.2
        • 3.1.1
        • 3.1.0
        • 3.0.0
      • HarperDB Penny (Version 2)
        • 2.3.1
        • 2.3.0
        • 2.2.3
        • 2.2.2
        • 2.2.0
        • 2.1.1
      • HarperDB Alby (Version 1)
        • 1.3.1
        • 1.3.0
        • 1.2.0
        • 1.1.0
  • More Help
    • Support
    • Slack
    • Contact Us
Powered by GitBook
On this page
  • Transactions
  • Queueing
  • Topologies
  1. Developers
  2. Replication/Clustering
  3. Legacy NATS Clustering

Things Worth Knowing

Additional information that will help you define your clustering topology.


Transactions

Transactions that are replicated across the cluster are:

  • Insert

  • Update

  • Upsert

  • Delete

  • Bulk loads

    • CSV data load

    • CSV file load

    • CSV URL load

    • Import from S3

When adding or updating a node any databases and tables in the subscription that don’t exist on the remote node will be automatically created.

Destructive database operations do not replicate across a cluster. Those operations include drop_database, drop_table, and drop_attribute. If the desired outcome is to drop database information from any nodes then the operation(s) will need to be run on each node independently.

Users and roles are not replicated across the cluster.


Queueing

Harper has built-in resiliency for when network connectivity is lost within a subscription. When connections are reestablished, a catchup routine is executed to ensure data that was missed, specific to the subscription, is sent/received as defined.


Topologies

Harper clustering creates a mesh network between nodes giving end users the ability to create an infinite number of topologies. subscription topologies can be simple or as complex as needed.

PreviousManaging SubscriptionsNextCertificate Management

Last updated 2 months ago