Buurst SoftNAS HA™

Taking care of your High Availability needs

Background

Buurst SoftNAS’ offers a couple of choices for your high availability needs. For customers who are comfortable with the reliability of a single availability zone, we have SoftNAS Dual Controller HA (SMART HA), and for those customers who need a higher degree of reliability, we have SoftNAS Snap HA™.

Overview

SoftNAS offers a choice for your high availability needs. Block storage in the cloud provides 99.9% durability or more, for servers with direct-attached storage to the VM. SMART HA and Snap HA are for customers who want highly available (enterprise) features of a NAS in the cloud.

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  SoftNAS SMART HA™ SoftNAS SNAP HA™
High Availability 99.9% 99.999%
SoftNAS 2 Controllers 2 Controllers
Storage 1 set of RAID storage Two sets of redundant RAID storage
Availability Zones 1 zone Two zones
Replicate across availability zones No Yes
Virtual IP (VIP) Yes Yes
  SoftNAS SMART HA™ SoftNAS SNAP HA™
High Availability 99.9% 99.999%
SoftNAS 2 Controllers 2 Controllers
Storage 1 set of RAID storage Two sets of redundant RAID storage
Availability Zones 1 zone Two zones
Replicate across availability zones No Yes
Virtual IP (VIP) Yes Yes

SoftNAS SMART HA™

Smart HA™ provides customers a lower cost option for high availability while still providing 3-9’s of uptime (8 hours, 46 minutes of unplanned downtime per year).

Cloud storage can be the most expensive component in HA solution. SMART HA uses one copy of storage which provides a 50% savings on storage compared to a fully replicated cross availability zone solution.  SMART HA provides HA by utilizing dual SoftNAS controller heads (2 SoftNAS instances/VMs) with a single copy of storage, which both nodes share. This shared block storage continues to provide high-durability (the exact number of 9’s depends on the cloud and storage type).

With SMART HA, if a failure of the NAS occurs, the secondary controller takes over as primary and imports the shared disk devices, effectively taking ownership of managing the shared filesystems.

SoftNAS Snap HA

Snap HA is for customers who need 5-9’s availability. SNAP HA uses SnapReplicate™ to replicate data from a primary node to the secondary node in an HA pair. Snap HA uses a virtual IP (VIP) address to ensure clients maintain connectivity to the NAS data after failover. SoftNAS nodes are in different availability zones in the public cloud or a VMware fault-tolerant configuration. Automatic failover monitors the health of underlying storage, the ZFS filesystem, and network conditions, carefully managing the cluster to ensure applications and workloads remain highly-available, even in the face of underlying cloud platform host, storage, or network failures. SoftNAS’ unique, patented high-availability technology, enabling only SoftNAS to provide a No Downtime Guarantee SLA for its customer’s peace of mind in the cloud. Learn more about SoftNAS HA.

Side by side

Below we see the two configurations. On the left, SNAP HA operates across two availability zones, each with a redundant, replicated copy of storage. The SoftNAS controllers manage unified client access via NFS, CIFS, and iSCSI to the shared filesystems. On the right, there are still two SoftNAS controllers which share a single copy of block storage. In both cases, a single HA IP address, which we call a Virtual IP (VIP), routes the client traffic to the current Primary SoftNAS controller. The Primary controller replicates data changes to the Secondary controller, which runs in a separate zone with its copy of the block storage.

SoftNAS Snap HA and SMART HA are available on the marketplaces of AWS and Azure and with a BYOL license for VMware.

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AWS

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VMware

“It takes weeks and months for us to provision storage on our local private SAN. Using SoftNAS Cloud NAS, it can happen in a matter of minutes to get any amount of storage we need.”

Keith Son, Director of Infrastructure, Greater New York City Area – Broadcast Media