Although Microsoft hasn't announced this yet officially but it has been communicated in one of their events.
Being the first ever cloud vendor to do so, Microsoft Azure will now be offering SLA on services hosted on single instance!
Single instance in Azure will now be covered under 99.9% SLA whereas double instance in Availability Set will have 99.95%. Although it comes with a restriction of how you set it up but at least an official commitment is there.
In order to get an SLA on single instance in Azure, the storage used for the VM Operating System and Data disks must be using Premium Storage. Premium Storage offers a much higher level of availability and performance with 5,000 IOPS per disk, versus 500 IOPS per disk with Standard Storage. The way Premium storage offers this is by utilizing SSD storage drives within the data center that are located on the same server hardware where the VM is running. Premium storage also offers a much higher throughput rate per disk of 2 Gbps.
Having announced that it is still recommended to host services on more than 1 instance configured under Availability Set to get higher SLA and availability & reliability.
For more details around virtual machines SLA on Azure, read here.
Being the first ever cloud vendor to do so, Microsoft Azure will now be offering SLA on services hosted on single instance!
Single instance in Azure will now be covered under 99.9% SLA whereas double instance in Availability Set will have 99.95%. Although it comes with a restriction of how you set it up but at least an official commitment is there.
In order to get an SLA on single instance in Azure, the storage used for the VM Operating System and Data disks must be using Premium Storage. Premium Storage offers a much higher level of availability and performance with 5,000 IOPS per disk, versus 500 IOPS per disk with Standard Storage. The way Premium storage offers this is by utilizing SSD storage drives within the data center that are located on the same server hardware where the VM is running. Premium storage also offers a much higher throughput rate per disk of 2 Gbps.
Having announced that it is still recommended to host services on more than 1 instance configured under Availability Set to get higher SLA and availability & reliability.
For more details around virtual machines SLA on Azure, read here.
