Guest OS is Windows 2012  SQL 2014  network adapter is Vmxnet3

Tom Cass
Network Administrator
Van Eerden FoodService
616-475-0900   x292

From: listsadmin@lists.myitforum.com [mailto:listsadmin@lists.myitforum.com] On 
Behalf Of Sean Martin
Sent: Wednesday, April 20, 2016 11:25 AM
To: ntsys...@lists.myitforum.com
Subject: Re: [NTSysADM] VMware San replication advise

I've always relied on the replication/DR capabilities included with apps like 
SQL and Exchange vs. SAN based replication solutions. With that said, I've 
never encountered network interruption associated with taken vSphere snapshots. 
What OS are you running on the SQL server and which network adapter are you 
using?

- Sean

On Wed, Apr 20, 2016 at 7:01 AM, Tom Cass 
<t...@vaneerden.com<mailto:t...@vaneerden.com>> wrote:
Need some design advice,
We have recently  started virtualization of our physical servers for the 
express purpose of reducing RPO RTO.
So we have a   Nimble SAN doing replication to a DR Nimble San.  A VMware 
cluster at each end.
The replication is uses a 1GB link.
When we do synchronized snapshots of  Nimble volumes  which triggers a VMware 
snapshot which triggers the VSS writers in the appropriate guests.
The snapshot succeeds and replicates But …
If the guest is running MSSQL, most of the client PCs running Dynamics  
Accounting experience connection problems, causing errors and a restart of the 
client app.
When pinging the virtual server during a snapshot at least 3 pings are lost.  
VMWare says this is normal.

Is anybody out there running MSSQL on a virtual server  where the SAN volumes 
are being replicated?

Tom Cass
Network Administrator
Van Eerden FoodService
616-475-0900   x292<tel:616-475-0900%C2%A0%C2%A0%20x292>


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