Tuesday, March 27, 2012

Database Snapshots vs Snaphot replication

In the enterprise version of SQL there is the facility to do snapshot
replication which I have not tried.
How does this differ from snapshot replication?
What this does is capture a point in time image of a database which you can
connect to as a different database.
Database snapshots are local to the database and uses up considerable disk
space. Snapshot replication can replicate locally and/or remote. It can
replicate to multiple subscribers.
Hilary Cotter
Looking for a SQL Server replication book?
http://www.nwsu.com/0974973602.html
Looking for a FAQ on Indexing Services/SQL FTS
http://www.indexserverfaq.com
"PromisedOyster" <PromisedOyster@.hotmail.com> wrote in message
news:1170891510.578187.22220@.v33g2000cwv.googlegro ups.com...
> In the enterprise version of SQL there is the facility to do snapshot
> replication which I have not tried.
> How does this differ from snapshot replication?
>
|||Thanks Hilary
My client is considering using mirroring for fault tolerance under SQL
Server 2005 but they also require a version of the database that is
reasonably up to date for reporting purposes. They dont have the
Enterprise version of SQL, so I was wondering if mirroring and then
doing snapshot replication (from the mirror) would be a viable
solution. I suspect not as the database would be unavailable for too
long. In addition, I am not even sure if this is an available option.
NB: They are unable to use transactional or merge replication due to
the tables not having primary keys.
I know that snapshot replication can be extremely slow but I am not
sure how much faster database snapshots are? In addition, when you do
them, can you simply overwrite the previous one as you dont want the
clients to have to access a different database?
Bottom line, is it a viable solution to make multiple database
snapshots during the course of a production day (from the mirror)?
I dont want to propose going to Enterprise version if it isnt going to
work.
On Feb 8, 12:29 pm, "Hilary Cotter" <hilary.cot...@.gmail.com> wrote:
> What this does is capture a point in time image of a database which you can
> connect to as a different database.
> Database snapshots are local to the database and uses up considerable disk
> space. Snapshot replication can replicate locally and/or remote. It can
> replicate to multiple subscribers.
> --
> Hilary Cotter
> Looking for a SQL Server replication book?http://www.nwsu.com/0974973602.html
> Looking for a FAQ on Indexing Services/SQL FTShttp://www.indexserverfaq.com
> "PromisedOyster" <PromisedOys...@.hotmail.com> wrote in message
> news:1170891510.578187.22220@.v33g2000cwv.googlegro ups.com...
>
>
> - Show quoted text -
|||One problem, you can't do snapshot replication off a mirror.
Hilary Cotter
Looking for a SQL Server replication book?
http://www.nwsu.com/0974973602.html
Looking for a FAQ on Indexing Services/SQL FTS
http://www.indexserverfaq.com
"PromisedOyster" <PromisedOyster@.hotmail.com> wrote in message
news:1170908921.373111.263690@.v33g2000cwv.googlegr oups.com...
> Thanks Hilary
> My client is considering using mirroring for fault tolerance under SQL
> Server 2005 but they also require a version of the database that is
> reasonably up to date for reporting purposes. They dont have the
> Enterprise version of SQL, so I was wondering if mirroring and then
> doing snapshot replication (from the mirror) would be a viable
> solution. I suspect not as the database would be unavailable for too
> long. In addition, I am not even sure if this is an available option.
> NB: They are unable to use transactional or merge replication due to
> the tables not having primary keys.
> I know that snapshot replication can be extremely slow but I am not
> sure how much faster database snapshots are? In addition, when you do
> them, can you simply overwrite the previous one as you dont want the
> clients to have to access a different database?
> Bottom line, is it a viable solution to make multiple database
> snapshots during the course of a production day (from the mirror)?
> I dont want to propose going to Enterprise version if it isnt going to
> work.
> On Feb 8, 12:29 pm, "Hilary Cotter" <hilary.cot...@.gmail.com> wrote:
>
|||Thanks, well I guess I can rule out snapshot replication.
However, what about database snapshots. How feasible is it to take
them once every half hour (say) and overwrite the existing one and
then use that as the reporting database server?
On Feb 8, 8:18 pm, "Hilary Cotter" <hilary.cot...@.gmail.com> wrote:
> One problem, you can't do snapshot replication off a mirror.
> --
> Hilary Cotter
> Looking for a SQL Server replication book?http://www.nwsu.com/0974973602.html
> Looking for a FAQ on Indexing Services/SQL FTShttp://www.indexserverfaq.com
> "PromisedOyster" <PromisedOys...@.hotmail.com> wrote in message
> news:1170908921.373111.263690@.v33g2000cwv.googlegr oups.com...
>
>
>
>
>
>
>
>
>
> - Show quoted text -

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