Synology RS422 Synology High Availability s White Paper

Synology RS422 Manual

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  • Synology RS422 | Synology High Availability s White Paper - Page 1
     White Paper Synology High Availability White Paper Based on DSM 7.0.1 1 Synology White Paper
  • Synology RS422 | Synology High Availability s White Paper - Page 2
    Table of Contents Introduction 02 Overview 03 Synology High Availability Architecture 04 Hardware Components Network Interface Network Scenarios Data Replication Special Conditions Achieving Service Continuity 09 Auto-Failover Protection Best Practices for Deployment 11 System
  • Synology RS422 | Synology High Availability s White Paper - Page 3
    downtime becomes a potentially fatal problem costing companies as much as over 12,000 USD a day. With the growing demand for uninterrupted availability, businesses seek for solutions that ensure high levels of service continuity. Synology Solutions for Service Continuity High availability solution
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    SHA is available on most Synology NAS and can be implemented at a lower investment cost. Key Features of Synology High Availability: • HA services including SMB, AFP, NFS, FTP, iSCSI, Synology Active Directory, Fibre Channel, and the DSM login page. • Supports uninterrupted updates of the Synology
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    Availability solution is a server layout designed to reduce service interruptions caused by system malfunctions. It employs two servers to form a "high-availability cluster" (also called "HA cluster") consisting of two compatible Synology servers. Once this high-availability cluster is formed, one
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    single namespace. Therefore, when a switchover is triggered and the provision of services is moved to the passive server, there will be no need to covers different configurations for various situations and Synology NAS models. Network Implementation for Synology NAS with Two LAN Ports In situations
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    the switch connected to the active server or the switch fails, service continuity will be maintained by switching over to the passive server (assuming the network connection of the passive server is healthy). Network Implementation for Synology NAS with Four or More LAN Ports The best way to create
  • Synology RS422 | Synology High Availability s White Paper - Page 8
    are advised to manually enable/disable the NAS Data Services: All file services including CIFS/NFS/AFP are covered. • iSCSI Data Services: High-availability clustering supports iSCSI, including iSCSI LUN and iSCSI Target services. • DSM and Other Services: Management applications, including Synology
  • Synology RS422 | Synology High Availability s White Paper - Page 9
    indicating when the server became active. The information should be found in Synology High Availability or the read-only File Station. Thus, users would be choose one server to be the new active server and resume high availability services right away (the data on the new passiver server will be over-
  • Synology RS422 | Synology High Availability s White Paper - Page 10
    Continuity Achieving Service Continuity Auto-Failover Protection To ensure continuous availability, Synology High Availability allows switching from the active server to the passive server in a normally functioning high-availability cluster at any time. Switchover can be manually triggered for
  • Synology RS422 | Synology High Availability s White Paper - Page 11
    Achieving Service Continuity • Power Any USB/eSATA devices attached to the active server will have to be manually attached onto the passive server once switchover is complete. Note: When a DSM updates, all services will be stopped and then come online after DSM update installation is completed 10
  • Synology RS422 | Synology High Availability s White Paper - Page 12
    Deployment Best Practices for Deployment Different customers of Synology NAS products may attach importance to various aspects of LAN ports. System Performances To meet the needs of operating performance-intensive services, and of processing a massive amount of connections or frequent data access
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    software protection of Synology NAS servers. However, aside from the NAS storage itself, the normal operation of the whole services also depends on interface card. In the case that a problem occurs with external network interface card 1, all services can still be provided through external network
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    Brain Prevention with Quorum Server In a real implementation of Synology High Availability, there are a certain number of possibilities while the failover from active server is not triggered. Both servers may assume the services at the same time and, in this case, the splitbrain occurs. To avoid
  • Synology RS422 | Synology High Availability s White Paper - Page 15
    Performance Benchmark Performance Benchmark Performance Considerations Synology High Availability employs the synchronous commit approach by acknowledging write 5 113.1 113.1 112.4 112.9 113 113 112.1 112.9 1 The configuration of each server in the SHA cluster. 14 Synology White Paper
  • Synology RS422 | Synology High Availability s White Paper - Page 16
    • The number and total loading of services on the cluster The following table provides estimated time-to-completion: Settings Switchover Failover DS920+ 64 62 SA3600 30 31 • Unit: second • Switchover is triggered manually in the Synology High Availability package. • Failover is triggered
  • Synology RS422 | Synology High Availability s White Paper - Page 17
    problems, a solution especially suitable for small and mid-range businesses with limited IT resources. Synology High Availability (SHA) is available on most Synology NAS acquiring Synology NAS. Synology High Availability (SHA) provides a cost-effective and reliable means of ensuring against service
  • Synology RS422 | Synology High Availability s White Paper - Page 18
    specifications and product descriptions at any time, without notice. Copyright © 2019 Synology Inc. All rights reserved. ® Synology and other names of Synology Products are proprietary marks or registered trademarks of Synology Inc. Other products and company names mentioned herein are trademarks of
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White Paper
Based on
DSM 7.0.1
Synology High Availability
White Paper