Previously Miles Waller wrote: > Hi, > > I'm looking at a HA setup for a project, and was wondering what the current > best way forward would be. There seem to be a few potential options around > for the storage end of the setup, and I'm wondering what's now considered > the current "best practice" for this sort of setup. Specifically, I've come > up with three options: > > 1. RelStorage > Using this, I think I can then take care of replication/mirroring as I have > access to a database that is already clustered in a HA environment. My > questions are: > + Are the connections opened only when zope is started? Say I unplugged a > network cable and then plugged it back in again (breaking the database > connection) - will it be re-opened? > + How does RelStorage take care of the blob storage? > + Are there any details of big sites out there that use RelStorage > (particularly on Oracle)?
The initial RelStorage development was sponsored by Jarn and Elkjøp for exactly that purpose: Elkjøp (a chain of Scandinavian electronics stores) uses an Oracle cluster for storage of all their Zope data. > 2. ZeoRAID > I could use ZeoRAID to write to maintain several independent storages > subject to stopping the ZeoRAID server being the single point of failure (I > posted some questions about this separately). If I remember correctly the ZeoRAID server is stateless, so you can use a standard redundant setup to remove the single point of failure. > 3. ZRS > If I'm right, ZRS still has a limitation in that there is a single server > for writes. Also, budget may be an issue. Having read the factsheet, I'm a > bit unsure as to how it is functionally different from ZeoRAID - can anyone > explain? >From what I hear ZRS is also fairly expensive, especially compared to the other two options which are free. Wichert. -- Wichert Akkerman <wich...@wiggy.net> It is simple to make things. http://www.wiggy.net/ It is hard to make things simple. _______________________________________________ Zope-Dev maillist - Zope-Dev@zope.org http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )