IDS Forum

Re: HDR for Enterprise DR solution?

Posted By: Informix DBA
Date: Tuesday, 3 July 2012, at 12:00 p.m.

In Response To: Re: HDR for Enterprise DR solution? (Fernando Nunes)

Fernando,

Thank you for your feedback. We are most concerned with the stability of
the servers and replication i.e. not having servers crash. Our DB's are
logged and have avoided using raw tables (IIRC). We are most interested in
discovering if other customers are using the HDR / RSS as an enterprise
solution with high-end hardware i.e. fast processors and a heavily used
OLTP DB with 2,000 + concurrent sessions.

Thank you,

David

On Tue, Jul 3, 2012 at 10:53 AM, Fernando Nunes <domusonline@gmail.com>wrote:

> Not sure if I'll answer your exact question, because I don't know if you're
> concerned with the distance or the load.
> I work frequently on a customer site using HDR/RSS on the same datacenter.
> They reach 3000 sessions frequently.
> They have 1 HDR and 1 RSS. The machines are HP-UX with around 3/4 years. No
> problems.
>
> I used to go to another customer with an HDR around 300KM apart from the
> primary. Usually no problems but less load than the other customer.
> They had some issues if the connection went down, but this was V10...
>
> With 11.10+ you have the option to use RSS which should not have any impact
> on the primary (aprt the fact that the primary needs to send the logs)
> With HDR you may have some issues with latency during checkpoints.
>
> Using Informix DR can be cheaper than other disk based solutions.
> Nevertheless I also have customers using disk based because they use it for
> other systems and the size of the database is "small" (I believe the disk
> replication feature cost is based on size...?)
>
> Of course, you should test it... For HDR, the parameters can make a
> difference.
> And you have to evaluate if you can use it.... Are your databases logged?
> Do you usually use raw tables?...
>
> Regards.
>
> On Tue, Jul 3, 2012 at 3:14 PM, Informix DBA <in4mixdba@gmail.com> wrote:
>
> > Hi,
> >
> > We are exploring using HDR / RSS for an enterprise DR (Disaster Recovery)
> > solution. We are currently on 11.50.FC6 (eventually will upgrade to
> > 11.70). We have a heavily used OLTP system with 2,000 + concurrent
> > sessions. We are looking for a rock solid DR solution. Currently we use
> > True-Copy disk replication from Site A to Site B and are looking to
> replace
> > that with an Informix based DB solution. We will have dual 10 Gb lines
> > between the sites with a distance of 110 km (69 Miles). I am told the
> > latency will be very low - as if the 2 servers were in the same data
> > center. We are using top of the line, fast Unix Solaris servers.
> >
> > Does anyone have any input? Is anyone running a similar production setup
> > with fast servers, many concurrent sessions and using HDR ? Any real
> > production based feedback would be greatly appreciated. Also feel free to
> > email me offline.
> >
> > Thank You,
> >
> > David
> > in4mixdba@gmail.com
> >
> > --20cf3066791994ed9304c3ed8765
> >
> >
> >
> >
>
> *******************************************************************************
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
> >
>
> --
> Fernando Nunes
> Portugal
>
> http://informix-technology.blogspot.com
> My email works... but I don't check it frequently...
>
> --20cf303b40ef03b0d004c3ee12da
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--20cf306f74d866d02504c3ef01c7

Messages In This Thread

• HDR for Enterprise DR solution?
  Informix DBA -- Tuesday, 3 July 2012, at 10:14 a.m.
  • Re: HDR for Enterprise DR solution?
    Art Kagel -- Tuesday, 3 July 2012, at 10:25 a.m.
    • Re: HDR for Enterprise DR solution?
      Informix DBA -- Tuesday, 3 July 2012, at 11:48 a.m.
      • Re: HDR for Enterprise DR solution?
        Art Kagel -- Tuesday, 3 July 2012, at 11:52 a.m.
  • Re: HDR for Enterprise DR solution?
    Fernando Nunes -- Tuesday, 3 July 2012, at 10:53 a.m.
    • RE: HDR for Enterprise DR solution?
      LARRY SORENSEN -- Tuesday, 3 July 2012, at 11:52 a.m.
    • Re: HDR for Enterprise DR solution?
      Informix DBA -- Tuesday, 3 July 2012, at 12:00 p.m.
  • Re: HDR for Enterprise DR solution?
    KERNOAL STEPHENS -- Tuesday, 3 July 2012, at 12:08 p.m.

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