HA with Sql Server 2008 and EMC

Hello colleagues!

I work with an active-passive sql cluster, the cluster is based on MSCS (Microsoft Cluster). Each Sql nodes is sitting on separate hosts of Esxi5. LUN is sitting on the machine of the EMC AX4 with iScsi.

I have a lot of problems with this group. I experience several unnecessary failovers.

I would consider moving on VMware cluster.

The problem is that I can't find a good reference on the VMware SQL Server HA environment solutions. The problem is how do I know that this failover will not damage files my SQL servers mdf\ldf?

The experience of someone?

Thank you!

-Chen

My 2 Cents

I am looking for a solution that knows what VM SQL fails on the #1 host (VM, not the crowd!) and will trigger an another VM (on another host #2) which will have the LUN (in the EMC storage) - I I will achieve my wishes.

To do this, I recommend always to create 2 VMs and implemented a MSCS on the VMware host computers.

In your cluster settings, create a rule of affinity to never operate these 2 machines on the same host.

FT might work, but there are 2 problems:

-Don't take charge 1 vCPU VMs. Don't know if this SQL box can work with 1 vCPU

-FT creates a virtual machine in doubles at the stage of the lock. If the main VM operating system crashes (blue screen) the other VM will likely be the same.

The purpose of FT is to have no interruption of service in case of failure of the host. It does not protect the BONES

But it might be possible with a single VM SQL based on HA only.

When a host fails, the SQL VM starts on another host. Now depending on how long this virtual machine takes to start, it could be 1-2 minutes downtime. You will need to test the startup speed.

When an MSCS falls down, according to the Setup, it could also mean 1-2 min downtime, which is the same result

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Tags: VMware

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