LCR, CCR, SCC and SCR

[GrimR]

Maybe someone can explain

LCR - Local Continuous Replication. Single server solution to provide data redundancy.
I take it I can replicate to another Server x86 partition. Not directly attached but networked.

CCR - Cluster Continuous Replication.
I take it needs 2 x exch servers

SCC - Single Copy Cluster.
Needs 2 x exch servers

SCR - Standby Continuous Replication (SP1).
Again I think this is 2 servers

And what does Transport Dumpster Enabled for LCR do? All my roles are on a single server, so does this affect me in any way?

And if you bring another server online after a crash, do you need to move the databases back or could you mount them from the x86 server share that was created/

 

[58sniper]

LCR is designed to be to the same server.

SCC is shared storage, CCR is not (each of the two CCR nodes has their own storage)

SCR is essentially log shipping to another server (CCR is a local server, and SCR can be a remote server).

And, from the horse's mouth:

How the Transport Dumpster works with a CCR cluster

Pat Richard
Microsoft Exchange MVP

 

[GrimR]

So if LCR is a means of recovery, yet it can only replicate to itself, and the server crashes, doesn't that defeat the object.

 

[58sniper]

It's not designed to really be a means of recovering from a failed server. It's meant to be a means of recovering from a failed or corrupt database.

Pat Richard
Microsoft Exchange MVP

 

[GrimR]

Thanks for clearing that up

 

[Zelandakh]

LCR is also for resilience against hard drive failure.