A data center site is built as a series of interconnected grid nodes. Each grid node type hosts a particular set of services that perform a specialized set of operations.
Grid nodes
The basic building blocks of a
StorageGRID Webscale system are grid nodes. There are four grid node types:
- Admin Node: provides management services such as system configuration, monitoring, and logging
- API Gateway Node: provides a load balancing interface to the StorageGRID Webscale system through which applications can connect to the system (optional)
- Archive Node: provides an interface through which object data can be archived to
an external archival storage system
(tape or the cloud) for long term storage.
- Storage Node: manages object data and metadata storage including loss protection
This diagram shows how grid nodes and services are arranged within a StorageGRID Webscale system:
Services
Each grid node includes a
set of services, which are software modules that provide a set of
capabilities to the grid node. These services work together during
the object lifecycle of ingest, retrieval, and deletion. The different types of services are as follows:
- Administrative Domain Controller (ADC) service: maintains topology information and provides authentication services
- Audit Management System (AMS) service: tracks system activity and events
- Archive (ARC) service: communicates with archiving services through which object data is sent to an external archival storage system (tape or the cloud)
- Connection Load Balancer (CLB) service: acts as a switchboard for connecting clients to the most efficient LDR service
- Configuration Management Node (CMN) service: manages system-wide configurations, connection profiles, and grid tasks
- Content Management System (CMS) service: manages object data through the StorageGRID Webscale system’s ILM policy
- Distributed Data Store (DDS) service: manages object metadata
- Local Distribution Router (LDR) service: manages the storage to disk of object data
- Network Management System (NMS) service: used to monitor system status and to configure the StorageGRID Webscale system
- Server Status Monitor (SSM) service: monitors hardware performance such as key operating system metrics and network metrics
Common services and components
The Server Status Monitor (SSM) service monitors hardware performance such as key operating system metrics and network metrics. The SSM service is found on every grid node.
| Service |
Component |
Go here to... |
|---|
SSM
 |
Services
|
View the status of services and support modules running on the grid node. |
| Events
|
View information about events for the service.
Reset event counts.
|
| Resources
|
View resource information (processors, memory, interfaces, volumes, IP addresses) for the service.
Reset network error counts.
|
| Timing
|
View attributes that report on the state of the service’s time and the time recorded by neighboring services. |
All services use a standard set of attributes for the Events and Resources components.
| Service |
Component |
Go here to... |
|---|
All
 |
Events
|
View the logged events from the hardware drivers. |
| Resources
|
View attributes that report on the service health and all computational, disk device, and network resources. |
