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sql server replication : Database Snapshots vs Snaphot replication
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. [quoted text, click to view] 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.googlegroups.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?- Hide quoted text - > > - Show quoted text -
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 [quoted text, click to view] "PromisedOyster" <PromisedOyster@hotmail.com> wrote in message news:1170891510.578187.22220@v33g2000cwv.googlegroups.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? >
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 [quoted text, click to view] "PromisedOyster" <PromisedOyster@hotmail.com> wrote in message news:1170908921.373111.263690@v33g2000cwv.googlegroups.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: >> 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.googlegroups.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?- Hide quoted text - >> >> - Show quoted text - > >
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? [quoted text, click to view] 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.googlegroups.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: > >> 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.googlegroups.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?- Hide quoted text - > > >> - Show quoted text -- Hide quoted text - > > - Show quoted text -
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