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IDS Forum

Re: Dbspace question

Posted By: Kern Doe
Date: Thursday, 2 August 2012, at 5:09 p.m.

In Response To: RE: Dbspace question (Larry Sorensen)

Say, your database (source) created in dbs1 but all your tables are in dbs2, when you do onload (to target), of course, you must specify -d dbs1 (it is where the database is in), but all your tables are automagically onloaded to dbs2 -- as far as I remember.

HOWEVER, I must mention this issue based on my past experience involving onunload/onload with older version of IDS (9.4?) was that if you have created dbspaces with different page sizes, onunload of database level appears to work but then onload will fail -- I have not tried with the latest version so I do not know if IBM has fixed this bug.

I encourage you to test all these out to see for yourself.

________________________________
From: Larry Sorensen <lsorensen25@msn.com>
To: ids@iiug.org
Sent: Thursday, August 2, 2012 4:46 PM
Subject: RE: Dbspace question [27914]

So, what you are thinking is that, if I do not use onload -d dbspace (the -d
option), it will just use the same dbspaces as the unload came from rather
than the rootdbs, which I was worried it might?

Larry

-----Original Message-----
From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of Kern
Sent: Thursday, August 02, 2012 2:42 PM
To: ids@iiug.org
Subject: Re: Dbspace question [27913]

continue using onunload and onload, it should work as long as your target
instance has identical or similar dbspace layout. Why don't you test it out,
it should take 15 min and you'll know the answer.
For example, generate a schema of your source database but modify or comment
out extent sizes (to save space). On the target instance, recreate the same
database with this schema. Now run onunload, drop the database, then onload

On Aug 2, 2012, at 3:22 PM, "Larry Sorensen" <lsorensen25@msn.com> wrote:

> OK. I am under the gun here to get this done today. What you are
> telling me is that I can no longer use onload, now, because I have two
> dbspaces. Your utilities sound attractive, but there will be quite a
> learning curve, I am afraid. Do you have any documentation for doing
> this and setting everything up on a Solaris server? Are there any
> other suggestions for just getting me by today?
>
> Thank you for your help.
>
> Larry
>
> -----Original Message-----
> From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of
> Art Kagel
> Sent: Thursday, August 02, 2012 1:10 PM
> To: ids@iiug.org
> Subject: Re: Dbspace question [27909]
>
> You could use dbexport with the -ss option then dbimport or for a
> faster copy use my dbexport/dbimport replacement utilities myexport &
myimport.
> With the -E option these scripts use external tables to move the data
> about twice as fast as dbexport & dbimport. There is also a parallel
> mode option
> (-p) to unload the entire database in parallel which is often even faster.

> You will need the packages myexport and utils2_ak (for my dbschema
> replacement utility myexport that has schema support for
> dbexport/dbimport and myexport/myimport).
>
> Another alternative would be to use my dbcopy utility (also in
> utils2_ak) along with the mkdbcopy.awk script in the package
> utils4_ak. Mkdbcopy.awk will generate a shell script from a dbschema
> or myschema output file to copy the entire database directly from one
> server instance to the other without the intermediate disk file(s) by
> using dbcopy. Dbcopy is very fast and if you add in the time savings
> of not having to write the export files and read them back in, it is
usually faster even than that.
>
> Art
>
> Art S. Kagel
> Advanced DataTools (www.advancedatatools.com)
> Blog: http://informix-myview.blogspot.com/
>
> Disclaimer: Please keep in mind that my own opinions are my own
> opinions and do not reflect on my employer, Advanced DataTools, the
> IIUG, nor any other organization with which I am associated either
> explicitly, implicitly, or by inference. Neither do those opinions
> reflect those of other individuals affiliated with any entity with
> which I am affiliated nor those of the entities themselves.
>
> On Thu, Aug 2, 2012 at 2:22 PM, Larry Sorensen <lsorensen25@msn.com>
wrote:
>
>> Another question:
>>
>> Previously, we have used unload and onunload to copy a database from
>> one instance to another on the same server. I believe that the
>> database has been spread across two dbspaces, whereas previously all
>> the tables were located in only one dbspace. The command that we used
>> to use to load the database was
>>
>> onload -s 419400000 -d dbs1 -t /dev/rmt/1 database1
>>
>> The reason that we had to move some of the tables to a different
>> dbspace is that some of the tables were so large, they were running
>> out of extents and we had to create a dbspace with a larger page size.
>>
>> So, my question is, what is an equivalent command to copy this
>> database now that it occupies two dbspaces on the target?
>>
>> -----Original Message-----
>> From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of
>> Larry Sorensen
>> Sent: Thursday, August 02, 2012 12:04 PM
>> To: ids@iiug.org
>> Subject: RE: Dbspace question [27906]
>>
>> IDS 11.50.FC5
>> Solaris 10
>>
>> What is the command again, to see what dbspaces a database is using?
>>
>> Larry
>>
>>
>> *********************************************************************
>> *
>> ******
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>>
>>
>>
>>
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>
> --14dae934037169d5c104c64d29de
>
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