Synology SA3200D Synology High Availability SHA User Guide for DSM 7.0 - Page 3

Introduction

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Chapter 1: Introduction Chapter 1: Introduction High Availability solutions are in high demand for anyone involved in the deployment of important services such as databases, a company file server, virtualized storage, and more. All of these services have extremely low tolerance and cannot afford to be interrupted in the event of unexpected disasters or events. Because of its high cost and complicated setup, high availability is typically portrayed as an enterprise-only solution. However, Synology High Availability (SHA) is available on the majority of plus-series and all FS/XS-series devices, making it a cost-effective solution for protecting critical services. When a disaster strikes, SHA helps to reduce the impact on the effort needed to resolve any system or hardware issues, while also allowing businesses to avoid downtime for mission-critical applications and minimize lost revenue. To achieve high availability, SHA utilizes two Synology NAS that function as either the active or passive server to form a high-availability cluster. These servers are connected by a Heartbeat connection, which is a dedicated, private network connection that facilitates data synchronization and replication between the two devices. If the active server malfunctions or a service is abnormal, services will automatically failover to the passive server for it to take over services to minimize any downtime. With this in mind, users can rest assured that their services are constantly maintained, even in the event of sudden disaster. Those who wish to make full use of the support provided by Synology High Availability will benefit from the information in this User Guide. For information regarding SHA design and architecture, common scenarios, best practices, and performance metrics, please refer to the SHA White Paper. 01

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01
Chapter 1: Introduction
High Availability solutions are in high demand for anyone involved in the deployment of
important services such as databases, a company file server, virtualized storage, and more.
All of these services have extremely low tolerance and cannot afford to be interrupted in the
event of unexpected disasters or events.
Because of its high cost and complicated setup, high availability is typically portrayed as an
enterprise-only solution. However,
Synology High Availability (SHA)
is available on the
majority of plus-series and all FS/XS-series devices, making it a cost-effective solution for
protecting critical services. When a disaster strikes, SHA helps to reduce the impact on the
effort needed to resolve any system or hardware issues, while also allowing businesses to
avoid downtime for mission-critical applications and minimize lost revenue.
To achieve high availability, SHA utilizes two Synology NAS that function as either the
active
or
passive
server to form a
high-availability cluster
. These servers are connected by a
Heartbeat connection
, which is a dedicated, private network connection that facilitates data
synchronization and replication between the two devices. If the active server malfunctions or
a service is abnormal, services will automatically
failover
to the passive server for it to take
over services to minimize any downtime. With this in mind, users can rest assured that their
services are constantly maintained, even in the event of sudden disaster.
Those who wish to make full use of the support provided by Synology High Availability will
benefit from the information in this User Guide.
For information regarding SHA design and architecture, common scenarios, best practices, and
performance metrics, please refer to the
SHA White Paper
.
Chapter 1: Introduction