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| Title: | DEC Rdb against the World |
|
| Moderator: | HERON::GODFRIND |
|
| Created: | Fri Jun 12 1987 |
| Last Modified: | Thu Feb 23 1995 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 1348 |
| Total number of notes: | 5438 |
273.0. "Oracle Clusters vs VMS Clusters" by MDVAX4::DUNCANG (Gerry Duncan @KCO) Wed Dec 14 1988 15:28
In talking with several customers who have VMS clusters, I have
noticed a trend that some of them use Oracle on only one node VS
cluster wide. After much discussion, two primary reasons are cited:
- the cost of Oracle cluster wide
- performance
I, for one, was sucked into believing the Oracle dialogue that customer
ABC uses Oracle in a cluster. What wasn't said was that only one
node was available to the Oracle users. If the Oracle node goes
down, a .COM file must be run to bring up Oracle on the other node
and probably to switch terminal servers, etc.
I would like to hear if you have heard of similar instances so I
can decided if this is just a freak accident.
--gerry
| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 273.1 | It can be done but who wants to ... | NZOV01::GRAHAM | Chas - CMG/SWS @ HMO | Thu Dec 15 1988 09:16 | 14 |
| Having system managed a couple of Vax clusters running Oracle before
joining Digital I agree cost and performance are the two main reasons
not to run Oracle clustered.
It is possible to run multiple instances of a single Oracle accessing
the same database. If one node/instance goes down it doesn't affect
the others.
But oh the performance degredation that occurs when you run multiple
instances ... my measurements showed upwards of a 10% slow down when
using two or more instances.
/chas
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