Re: Need High Availability Solution Answer.

I could give you answers but I would only be paraphrasing from Tim Gorman's excellent paper that covers this subject in detail. Here is the URL:
http://www.evergreen-database.com/library.htm Its topic #4

In article <91e9db$q28$1_at_nnrp1.deja.com>,   humorous_at_my-deja.com wrote:
> Hey Gurus,
> Here are some of the facts of the situation:
>
> - This is a new database and hardware/software will be purchased to
> support this recommendation
> - Database needs to be able to scale to 500GB, and maybe more.
> - We will most likely implement a Sun Solaris/Oracle solution
> - They claim to be making frequent writes to the database
> - The database needs to be highly available 24/7/365
> - Need capability to migrate database to backup database server and
 make
> that database server active. (for rolling in production database
> changes with minimal downtime)
> - Database will be accessed via 3-tier web server/app server/db server
> scheme
> - two production environments with identical hardware configuration
 (one
> active, the other used as a staging environment) When staging
> environment is upgraded, the active and staging environment switch
> roles.
>
> Here are some of the questions that we need help with:
>
> Disk storage:
> Should we recommend a SAN or cross-connected A5200's?
> Shoule we use files or raw partitions?
>
> High availability:
> Should we recommend SunCluster or Oracle Parallel Server or both?
> (The local Oracle resource thinks OPS introduces too much
> complexity into the environment.)
> Or should we recommend Oracle replication?
> Or should we recommend a standby database?
> Active/Passive v. Active/Active
> How long does it take for each of these strategies to failover?
>
> Whatever we recommend, we are probably going to have to build as well
> and will need someone like yourself to come to Dallas to help us
 during
> the implementation phase of this project. If you are interested in
> working on this piece of the project, please let me know.
>
> OK, Here's the million dollar question:
>
> Is it possible to setup a redundant array of N+1 database servers that
> serve out the same database? I am looking for a configuration that
> would allow me to add a database server when I need additional
 capacity
> without modifying the application. This is probably a pure computer
> science question and I am not aware of any solutions in this problem
> space. I figured if anyone would have an idea on how to set this up,
 it
> would be you guys.
> thanks a lot,
> Taptriv
>
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>

Sent via Deja.com
http://www.deja.com/ Received on Fri Dec 15 2000 - 17:48:22 CST