Re: Datafile for rollback segment

"Richard Foote" <richard.foote_at_bigpond.com> wrote in message news:<rHAo9.48648$g9.139362_at_newsfeeds.bigpond.com>...
> Hi Alfons,
>
> Following on from what Howard said previously, why ?

Maybe disk2 needs to be used for other things during normal ops, but is appropriate for a weekend gigantor atomic update rollback?

>
> Cheers
>
> Richard
> "Alfons Zimmermann" <alfons.zimmermann_at_simplefact.de> wrote in message
> news:3DA2B931.8050304_at_simplefact.de...
> >
> > I would recommend:
> > a) CREATE 2 different Tablespaces (say TS_RBS_A, TS_RBS_B)
> > for rollback segments,
> > each of them with ONE Datafile, but these two Datafiles
> > on different Disks:
> > CREATE TABLESPACE TS_RBS_A
> > DATAFILE '/disk1/.../ts_rbs_a_01.dbf' SIZE 500M
> > CREATE TABLESPACE TS_RBS_B
> > DATAFILE '/disk2/.../ts_rbs_b_01.dbf' SIZE 500M;
> >
> > b) CREATE first Rollback Segment (e.g.: rbs_a1) in TS RBS_A
> > CREATE ROLLBACK SEGMENT rbs_a1 TABLESPACE ts_rbs_a;
> > c) CREATE 2. Rollback Segment (e.g.: rbs_b1) in TS_RBS_B
> > CREATE ROLLBACK SEGMENT rbs_b1 TABLESPACE ts_rbs_b;
> >
> >
> > d) Additionally, you could use the init.ora parameter
> > ROLLBACK_SEGMENTS=(rbs_a1, rbs_b1, rbs_a2, rbs_b2...)
> > to control the way, these rollback segments are initialized
> > on startup
> >
> >
> > Jayaraman Ashok wrote:
> > > Hi
> > > I have two datafiles for rollback segment tablespace and have enough
> > > free space on both the datafiles. Now to create a rollback segment in
> > > one specific datafile i offline the other datafile and try to create
> > > the rollback segment, which naturally must create it on the online
> > > datafile. But it is failing with ORA-3113 and i have to do media
> > > recovery to bring it back online. What is wrong here ? The setup is
> > > Oracle8.1.7.0.0 on Solaris7.
> > >
> > > Cheers,
> > > Ashok
> >

jg

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