24/7 Uptime’s server high availability partner, Marathon Technologies, presented a live webinar on 24 June. Some questions and answers arose during the live broadcast that concentrated on protecting a SQL environment using Marathon’s everRun fault tolerant high availability software and these are detailed below. Contact us on [email protected] if you would like to view the full webinar and/or be included on our mailing list so we can tell you about the next one.
Q: Does everRun work with SQL 2008?
A: Yes. everRun supports any Windows application without requiring changes or customisation. Because everRun resides below the operating environment, we are protected underneath that.
Q: Does everRun work with Exchange 2007 as well?
A: Yes it does. everRun supports any Windows application without requiring changes or customisation.
Q: Does everRun work with iSCSI?
A: We have an agnostic approach to storage as well. Pretty much any type of storage will work. iSCSI, fibre, direct attached, etc.
Q: What is the performance impact of using everRun with SQL?
A: There are variance rates depending on the servers and applications that you are using, but the impact has in general been shown to be very small.
Q: Does everRun work with the free XenServer?
A: Yes, everRun VM for XenServer supports the free version of XenServer as well as Essentials for XenServer Enterprise and Platinum Editions.
Q: How does everRun handle the mirroring of data that’s loaded in the memory?
A: With our level 3 fault tolerance, we actually mirror the memory and CPU between the two systems, so they are running in lockstep. This provides a 100% uptime solution. Our everRun software makes sure that the memory and CPU state are mirrored and completely synchronized between the two servers at all times.
Q: Does everRun require a SAN?
A: No it doesn’t require a SAN. We can also mirror storage between two different systems, if that’s what you choose to do. A lot of everRun users do that, either locally or separated geographically. We can support a SAN in multiple ways. We can support a SAN where you have a single copy of the data. And both servers will connect to the single copy of the data. We also support a SAN where one of the servers is connected to that SAN and the other server has its own storage and we can mirror between that. A lot of our customers are using that option to provide data protection and fault tolerance at the data level. We can use different types of storage on either side.