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make_recovery from old server to new

 
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Steve Lewis
Honored Contributor

Re: make_recovery from old server to new

Kieran,
First of all, I recommend that you take your hardware upgrade budget and use it upgrade Oracle sooner rather than later, in place, on the old platform to a version that is also supported on the latest hardware.
Then your options will be far more open and the next generation of hardware you get will be *much* faster.
The PA-RISC servers are not going to be sold much longer and the cost per PA cpu is way higher than for an IPF cpu. Get a comparative quotation for an rp3440 (PA) and compare it with an rx3600(IPF).
HP want you to upgrade and they really want to keep you as a customer, so the pricing for a newer model of server will be advantageous.
You won't be able to restore a recovery tape to an IPF server, but you will be able to use the same in-place oracle data storage.
As a pure back-end DB server running Oracle, your migration to IPF will be much easier than having to port an in-house application.
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Re: make_recovery from old server to new

Thanks Mike.

Second user would be okay. My company just wants to know all the options because I am having to write the DR plan from scratch. (no I can't believe we never had one before either!).

Knowing that the company wallet rarely sees the light of day, it could be years before they splash out on modern hardware to replace our old servers. But that's not to say we shouldn't use something more modern for DR if the solution is workable.

We have the option of hiring/borrowing something to test with so we can find out if the software works. Which brings me back to the 'what model' question.

Kieran
Steve Lewis
Honored Contributor

Re: make_recovery from old server to new

The other thing is, if you are running 2 instances of Oracle on the same server (why not split them?) and have just one DR server, then you will have to double the memory.
For the later versions, people are now talking about a minimum of 8Gb RAM for a single instance (ie 16Gb for 2 instances) - but memory in these boxes is expensive. So that raises a question about the possibility of combining your instances into one large one - i.e. the same Oracle version and not spending so much capital on memory. You will have to weigh the costs. Most organisations would rather spend the money on memory and keep two separate installations because its the least risk option.

Re: make_recovery from old server to new

Thanks Steve
I agree with everything you say but there is no money. No-one in the company even gets a pay review this year!

DR is being forced on them in order to comply with a BSI standard (this is England by the way). So any money allocated will be the least they can get away with. It is very frustrating.

We are currently migrating the old Oracle 7 DB to Oracle 9 so that money at least is guaranteed. But it's not likely to be ready before the end of the year.

Sorry everyone I shouldn't be using this forum to complain about my employer!

Anyway, as long as I can give them some alternative server specifications then the ball is in their court.

Thanks
Kieran
Steve Lewis
Honored Contributor

Re: make_recovery from old server to new

Well in that case there are other options:
The first one is a specialist DR company like Sunguard availabililty services, who will quote you for a PA server that they already have in their data centre near Heathrow and some SAN storage. You just turn up with your tapes and do the recovery. You will also have to sort out the networking from them to your users.

The second (cheaper) alternative is to find a local company and do a back-scratching DR agreement with them. Your spare server for their use and their spare server for yours. Sounds easier than it probably is and a bit glib I know.

The third idea is to go commodity (ie PC) hardware and Linux for your DR database hosting. You would effectively be doing a migration for each DR but you may make it work if you can get away with setting set the service standards low enough - e.g. a regular export/unload of data instead of a RMAN backup or fbackup.



Mike Shilladay
Esteemed Contributor

Re: make_recovery from old server to new

Hi Kieran,

Do you have the specs (memory, disc) for your existing server? I am convinced you would be surprised by the costs. If the requirement was to run in the eventuality of a disaster albeit at a slower speed you may find that something like rp5470/4 way might be enough. (Max 16GB/4 CPU's at 550MHz)

Mike.
Steven E. Protter
Exalted Contributor

Re: make_recovery from old server to new

Shalom Kieran,

Server model recommendations require some idea as to the size and activity of the database.

For Oracle without any application servers a 2 GB RAM is considered the minimum.

To run Oracle 8.1.7.4 which is out of support you can't go with the more powerful Itanium servers because they don't run HP-UX 11.11

An rp3440 with 2 GB of RAM is more than powerful enough to run up to intermediate activity Oracle databases in the 7/8 range.

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Steven E Protter
Owner of ISN Corporation
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Re: make_recovery from old server to new

Hi
The current servers each have 3 CPUs and 4 Gb memory. The Oracle 7 and 8 DBs are each split across 4 x 18Gb FC disks. Although the 7 DB would fit on 1 x 18Gb and the 8 DB is just a little bigger.

Max users per day is < 200 but we could manage with less than half that number in a DR situation.

Kieran
Mike Shilladay
Esteemed Contributor

Re: make_recovery from old server to new

Hi Kieran,

If you are prepared to take a modest performance cut, an rp2450/2 way or A500/2 would probably do it, (rp2470 will also work but is more expensive as that is still sought after) with 4GB RAM (8GB MAX capacity), 2 x 18Gb internal drives for OS and some external drives for the application, SCSI drives will be cheaper.

I am thinking that a price of circa 4-5k pounds sterling. This solution will be 3U, but no tape is present.

If you want the same or better perfomance then the rp5470 will be best, but will cost more.

Mike

Re: make_recovery from old server to new

Thanks Mike

The company expects a cut in performance so that isn't a problem.

At least now I have a starting point to work from.

Thanks again to everyone who contributed.

Regards
Kieran