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05/10/2003 at 05:22AM PDT, ID: 20612080
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7.0

Tablespace and Datafiles --- Too Many ??

Asked by and_dev in Oracle Database

Tags: oracle, anand, consolidate, datafile, tablespace

Hi,
I am planning to move a DW database from a HP-UX 64-bit to a solaris 64-bit environment. The new environment has a SAN with RAID 5.
In my old HP-UX box, I have the usual tablespaces SYSTEM,TOOLS,TEMP,RBS and USERS
and DATA and INDEX tablespaces.

There are about 50 DATA tablespaces and 30 INDEX tablespaces all for the same application. Altogether I have about 104 tablespaces.

My question is :

1) Do I really need the 50 data and 30 Index tablespaces or can I just consolidate all of them into one data and one index tablespaces or atmost 2.(since they all belong to the same application).

2) Does the placement of datafiles and tablespaces really matter on SAN ? I mean does it really matter that I place my data and index files on a different set of disks with a different controller for concurrent accesses ? There are so many conflicting notes on this that I am confused.

3) Does it buy me anything in performance by reducing the number of tablespaces ?

4) How should I layout these tablespaces along with online log and controlfiles assuming that I have about 10 mountpoints for Oracle files.(Lets assume I am going with all 104 tablespaces)

5) The size of the database is 800GB. So another point to consider is if I consolidate all the data and index tablespaces into one/two data and index TS, I will have to probably use large datafiles. Are there any issues if I create a datafile of size 8/16GB ? I will be moving to Solaris 8,64-bit.Other than recovery issues are they any performance issues with large datafiles ?

Any ideas ?

Thanks,

Anand Devaraj
[+][-]05/10/03 06:06 AM, ID: 8499896

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Zone: Oracle Database
Tags: oracle, anand, consolidate, datafile, tablespace
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Solution Provided By: csar
Participating Experts: 4
Solution Grade: A
 
 
[+][-]05/10/03 07:53 AM, ID: 8500170

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