How does High-Availability (HA) work on Azure?

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Last updated: May 08, 2023 by Riad Mahamudul (Unlicensed)

SoftNAS employs an active-passive HA pairing with both VM’s residing in an Azure Availability Set for maximum uptime. If one VM goes down, the other takes over. This configuration ensures that during either a planned or unplanned maintenance event or unexpected hardware failure, at least one virtual machine will be available and meet the 99.999% per year uptime Azure SLA. We replicate between the two for delivering our No Storage Downtime Guarantee.

Our current HA solution relies on the replication of data between instances. The SoftNAS SNAP HA® feature is based on an active-passive pairing of instances with a 60-second asynchronous data replication cycle. The storage that SoftNAS presents (i.e. block or blob) does not alter this requirement.