Re: DBMS Selection for 500+GB data and 500+ Users

> Clusters are a "future" announced from Informix. When they get there, > and if they support updates, they will have to use a DLM to manage cache > coherency. > > You point is not correct. Oracle's use of DLM is just one of many ways to implement a database architecture. There are other architectures for clustered and MPP systems which do not require DLM for updates. I don't know which architecture Informix uses for Online 8.0 but I'm pretty sure they don't use a DLM. I don't think Sybase's Navigation Server uses DLMs either. Now unfortunately, I can't tell you what these other architectures are because I'll break a few NDAs if I do. There may be some research work you can ftp or some books you can buy but I don't know of any. Can anyone else help? > David Natelson Oracle Corporation dnatelso@us.oracle.com David W Chan Objective Research Ltd dwc@cix.compulink.co.uk