Hi,

We have a situation where our customer does not want any data replication over WAN(specially OSD). They are inclined towards having multiple primary sites to manages OSD locally and are ok with the admin overhead. Can this approach have any  big issues?

Regards..

Does that also mean that they want to connect the primary sites via a CAS? If so, that means they still will have a lot of data replication between the CAS and the different primary sites.

Yes, CAS is part of the plan. But data going to CAS from primaries will depend on the number of endpoints per site and should be around 500 kb per client per day. right?

but OSD involves a lot of replication even though at bigger intervals so that's what is the red zone for them for now.

It's not just client data that's being synchronized. Please have a look here for more information about the data that's being synchronized: https://technet.microsoft.com/en-us/library/gg712701.aspx#Planning_Inter_Site_Com

Also, please keep in mind that the database replication between a CAS and primary is known for causing problems. If possible, always try to avoid using a CAS.

Thanks Peter. But the replication data(Primary-CAS) will still be not that bad to choke a KBPS link as the OSD binaries replication would do. So if we say that we are ok with this and to localize OSD, is it justified to put 10 Primary sites under CAS for 10 sites with slow interlinks.

Regards,...

I would say, no. I would look at either scheduling the content distribution, or pre-staged content, rather than a CAS.

"and are ok with the admin overhead"

What about the admin latency that will affect everything that they do as well as the huge perf impact that every additional primary site causes?

I agree with Peter -- this is not a good choice.

Is there a reason they can't do everything centrally using a remote desktop session host and VMs located in close proximity to this host. I admit that's not ideal but is much more palatable that 10 primary sites (that makes me shiver).

Do they really have ten different IT groups creating their own OSD content?