On Sun, Apr 10, 2011 at 2:39 AM, Wols Lists <antli...@youngman.org.uk>wrote:
> On 10/04/11 02:47, Dawn Wolthuis wrote: > >> > I am currently looking at how U2 fits in the cloud environment with > >> > products like Microsoft Azure and I think the model of U2 where each > table > >> > is a separate os file is better for cloud computing than Cache's one > system > >> > file (similar to the approach of other RDBMs). > >> > > > I think you have a case here, although the high availability, high > > scalability of Cache' might help in that regard. I do not have a clear > > understanding of possible shredding in either environment. > I didn't feel like looking up the word and as soon as I clicked send, I knew I intended the word "sharding." I'll admit I haven't looked into exactly what they mean by this, but I think the idea is to be able to separate sets of rows, not just partitioning by columns/files. > > Hmmm... > > Wheels within wheels etc. I think the ONLY advantage of separate tables > per file is that it is a convenient abstraction that our minds can grasp > easily. > For these huge web sites, I think the goals are related to partitioning onto separate servers. > > Look at Oracle, for example. It prefers not to use a file per database, > it just grabs a complete raw partition. > > The original Pick didn't have the concept of disk at all iirc - it just > used the disk as persistent virtual memory. > > To unix "everything is a file" - a filesystem is, to the kernel, just > another file. > > And once you get to virtual systems within virtual systems within > virtual systems ... :-) > At the end of the day, whether it's local or in the cloud or in a colo > I had to look up colo > or whatever, what you need is a decent backup strategy :-) > (and recovery!) but also a means to grow large without only a single central server stragey. I have looked at the ECP info from InterSystems http://www.intersystems.com/highavailability/ecp.html but have not looked at what might be analogous from U2 lately. --dawn > > Cheers, > Wol > _______________________________________________ > U2-Users mailing list > U2-Users@listserver.u2ug.org > http://listserver.u2ug.org/mailman/listinfo/u2-users > -- Dawn M. Wolthuis Take and give some delight today _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
