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4
votes
1answer
445 views

SQL Server 2008 R2 100% availability

Is there any way to provide 100% uptime on SQL Server 2008 R2? From my experience, the downtimes for the different replication methods are: Log Shipping: Lots (for DR only) Mirroring w. NLB: ~ 45 ...
7
votes
2answers
692 views

Multi-site high availability

We have a SaaS application that we need to be highly available. We already have an expensive, well-maintained Hyper-V failover cluster, but today the datacenter where we host that cluster had a ...
8
votes
3answers
2k views

Fault-tolerant NFS?

Probably a FAQ but I haven't found anything useful after a while of searching: Can I set up NFS in such a way that every single error (e.g. server CPU, hard disk, hd controller, network adapter, ...
2
votes
1answer
78 views

Combine 2 logical raid 0 drives to 1 logical raid 1 drive

I have an HP Proliant server with an P410i embedded array controller. The server was originally setup with 6 physical drives with the OS on 1 logical drive with a raid 0 and 5 physical drives setup ...
1
vote
1answer
288 views

Advantage of Microsoft Cluster over Microsoft Network Load Balancer

Till recently, I assumed that Microsoft NLB worked at an OS/Machine level rather than an Application Level. i.e. the NLB just monitors heartbeats on the machine to check if machine is alive and then ...
5
votes
3answers
1k views

Is round-robin DNS a possible solution for high availability?

Let's say I have 2 IPs for a given domain (round-robin DNS). If one the IPs becomes unresponsive, will clients try to connect to the other IP? or they will just fail to establish comunication with the ...
1
vote
1answer
90 views

What is the importance of “RpcClientAccessServer” on a database in an Active/Active stretched DAG?

I have two sites with a stretched DAG between them. By "sites" I mean two AD sites that correspond with different physical and network circuits. When I take an individual mailbox database and move ...
0
votes
1answer
722 views

VMware ESXi/vSphere Fault Tolerance vCPU Limit

So I am aware that VMs in FT mode are limited to a single vCPU. Is it possible to assign multiple cores to the single vCPU, and still have the VM support FT mode? Or are you forced to use both a vCPU ...