Compare High Availability Cluster Options

For high availability cluster protection for SQL Server in Windows environments, you have several options. You can use AlwaysOn Availability Groups with SQL Enterprise Edition but it will not protect distributed transactions and the number of databases protected are limited. You can use AlwaysOn Failover Clusters, but you can’t create a multi-site cluster or protect applications other than SQL. You also won’t get improved replication efficiency.

For high availability cluster and added protection, simply add SIOS DataKeeper to Microsoft SQL Server Standard Edition AlwaysOn Failover Cluster.   Save thousands of dollars with Standard Edition and add the flexibility to run SQL Server in any combination of physical, virtual, or cloud environment. You can also get high availability cluster protection for applications other than SQL Server, protect distributed transactions, system databases, and improved replication efficiency.

Your High Availability Cluster Options are Summarized Below

High Availability
Features
AlwaysOn
Availability Group
AlwaysOn
Failover Cluster
AlwaysOn
Failover
Cluster
with SIOS
DataKeeper
Support SQL Standard Edition high-availability-no high_availability-yes high_availability-clusters-yes
Protect Distributed Transactions no_protect-distributed-transactions sios_protects_high-availability-distributed-transactions sios_high_availability_distributed_transactions
Protect an Unlimited Number of Databases sios-no-blue-circle-2 sios-yes-blue-dot-2 sios-yes-blue-dot-2
Automated Client Redirection sios-yes-blue-dot-2 sios-yes-blue-dot-2
Protect System Databases
(Master, MSDB, etc.)
sios-no-blue-circle-2 sios-yes-blue-dot-2 sios-yes-blue-dot-2
Eases Database Administration sios-no-blue-circle-2 sios-yes-blue-dot-2 sios-yes-blue-dot-2
Support More than 2-Nodes in Failover Configuration sios-no-blue-circle-2 sios-yes-blue-dot-2 sios-yes-blue-dot-2
Replicates Data Other than SQL sios-no-blue-circle-2 sios-no-blue-circle-2 sios-yes-blue-dot-2
Improves Replication Efficiency sios-no-blue-circle-2 sios-yes-blue-dot-2
Eliminates SAN as a Single Point of Failure sios-yes-blue-dot-2 sios-no-blue-circle-2 sios-yes-blue-dot-2
Supports Multisite Clusters sios-yes-blue-dot-2 sios-no-blue-circle-2 sios-yes-blue-dot-2