Double-Take vs SQL Server Replication?

In another thread I noticed that Hilary mentioned Double-Take. I
had forgotten about this product.
I am curious if Double-Take would be a better solution for a
standby server, as wouldn't it replicate both ddl an dml data?
Anyone know aproximate cost of this product for a 2 server
enviornment?
Thanks
Dave
Its expensive, IIRC and I could be way off here it costs between 10 to 20k
for a per server license. This was about 4 years ago.
It works by shoehorning a driver between the file system and the OS, it then
sends the deltas to the secondary. It does use some CPU and RAM. RAM
consumption can be significant if your secondary goes off line. It
replicates/mirrors the entire drive/array so you can't do any form of
filtering which can be a good or bad thing for you. So it does replicate DML
and DDL.
In general it is not really scalable so it really is only a good choice in a
limited set of circumstances.
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
"David Gresham" <gresham@.panix.com> wrote in message
news:d5d37l$m4m$1@.reader1.panix.com...
> In another thread I noticed that Hilary mentioned Double-Take. I
> had forgotten about this product.
> I am curious if Double-Take would be a better solution for a
> standby server, as wouldn't it replicate both ddl an dml data?
>
> Anyone know aproximate cost of this product for a 2 server
> enviornment?
>
> Thanks
>
> Dave
>
|||I saw a presentation of double-take and geo-cluster from NSI software last
month...IIRC, the pricing was between $2495 and $5000 per server, but I
don't recall which price was for which product.
Kevin Hill
President
3NF Consulting
www.3nf-inc.com/NewsGroups.htm
www.DallasDBAs.com/forum - new DB forum for Dallas/Ft. Worth area DBAs.
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questions
"Hilary Cotter" <hilary.cotter@.gmail.com> wrote in message
news:eUx8uNYUFHA.1944@.TK2MSFTNGP14.phx.gbl...
> Its expensive, IIRC and I could be way off here it costs between 10 to 20k
> for a per server license. This was about 4 years ago.
> It works by shoehorning a driver between the file system and the OS, it
> then
> sends the deltas to the secondary. It does use some CPU and RAM. RAM
> consumption can be significant if your secondary goes off line. It
> replicates/mirrors the entire drive/array so you can't do any form of
> filtering which can be a good or bad thing for you. So it does replicate
> DML
> and DDL.
> In general it is not really scalable so it really is only a good choice in
> a
> limited set of circumstances.
> --
> Hilary Cotter
> Looking for a SQL Server replication book?
> http://www.nwsu.com/0974973602.html
> Looking for a FAQ on Indexing Services/SQL FTS
> http://www.indexserverfaq.com
> "David Gresham" <gresham@.panix.com> wrote in message
> news:d5d37l$m4m$1@.reader1.panix.com...
>