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Re: High-Speed/Volume Database

From: Chris Arets <chris.arets_at_hetnet.nl>
Date: 4 May 2002 14:23:23 -0700
Message-ID: <10c07c02.0205041323.5ff9d112@posting.google.com>


What i think Anton means is clustering of a database. This means several computers (for example 20 ordinary desktops) are 'linked' to eachother to form a cluster, so that the whole cluster can handle your database. Linux is the way to go here by the way. The point i really wanted to make is that Oracle also provides clustering i believe since version 8, but the version you have to look up on the website of Oracle.

Greets Chris Arets

P.S. The point about seeking professional consulting is a strong one :)

Anton Versteeg <av_at_nospam.for.me> wrote in message news:<3CD3AF0E.789EF440_at_nospam.for.me>...
> I agree with almost everything Bob is saying except of course his choice
> for Oracle. I would consider using DB2 UDB EEE (parallel database) where
> you can spread the data across different machines (nodes). This is a very
> scalable solution.
> As for the platform: Win2K, Unix, or Linux.
>
> Bob Hairgrove wrote:
>
> > On 3 May 2002 11:32:44 -0700, gatesucks_at_hotmail.com (Bob Smith) wrote:
> >
> > >We are designing an application that needs to use
> > >a relational database to hold quite a large amount
> > >of data.
> > >
> > >In particular there is one table that has about 33
> > >fields, 18 indexes, and 120 bytes per record.
> >
> > How do you know how many "bytes per record" there will be? What
> > difference does it make? This will vary a great deal and is a rather
> > meaningless quantity compared to other things such as block size.
> > Besides, those indexes will take up quite a bit of space on their own
> > ... sometimes almost as much as the data itself.
> >
> > >Additionally, we are going to need to add about 2
> > >million records per day to the table, delete about 2
> > >million records per day from the table, hold 2 weeks
> > >worth of data within the database (approx. 30 million
> > >records), and sustain an average add rate of about 23
> > >records per second while, at the same time, sustaining
> > >an average delete rate of 23 records per second.
> > >
> > >My questions are, what database software should we use,
> >
> > Depends on how much your data integrity is worth to you as well as how
> > much (or little) downtime you can afford. You look at the licensing
> > and do your own arithmetic. ;-)
> >
> > >what kind of hardware platform will be needed to
> > >support the specifications enumerated above,
> >
> > Same as above.
> >
> > >and what kind of average query performance can we expect?
> >
> > Depends on whether you're talking about reads or writes. You're well
> > advised to leave index creation alone until you're actually up and
> > running because they can really get in the way of your updates,
> > inserts and deletes. Only use an index if query performance demands
> > one (I'm not talking about constraints here). With only 33 fields, 18
> > indexes sounds like a few too many to me, but it really depends on
> > your data design. Each foreign key or unique constraint as well as
> > primary keys will usually be implemented through one or more indexes,
> > so it's always a trade-off as to how many are necessary. In general,
> > the fewer the better if you can get away with it performance-wise and
> > relational integrity-wise.
> >
> > You have a lot of data to manage and a lot of activity on the
> > database, so I would look at Oracle if I were you. And you'll need one
> > or more DBA's that know what they are doing. As to OS, some flavor of
> > Unix (better Sun than Linux because of the better support ... you pays
> > for what you gets ... and I would stay away from Windows for something
> > this big) is probably the way to go if you choose Oracle.
> >
> > Seriously, though, you should get some real professional consulting
> > instead of posting to newsgroups ... do you really want to take the
> > risk of having some college student with no experience telling you how
> > to handle this?
> >
> > Bob Hairgrove
> > rhairgroveNoSpam_at_Pleasebigfoot.com
Received on Sat May 04 2002 - 16:23:23 CDT

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