topic Re: Disaster Recovery Server in Operating System - HP-UX

Disaster Recovery Server

John Flanagan — Tue, 17 Sep 2002 11:57:06 GMT

I have recently purchased a second hand server as a backup for my D270 HP-UX 10.2

I want to use this as a disaster recovery server which will be kept off site.

My Original machine is a D270 single processor with 512 Mb RAM and 6 off 4GB Disks + 1 18 GB Disk.

My second machine is a D250 dual processor with 1GB RAM and 4 off 9GB Disks.

I am looking for help on the best way to make the second machine an image of the first one.

I hope to be able to use archive log files to keep the oracle db on the second machine up to date.

All help appreciated.

John.

Re: Disaster Recovery Server

Sanjay_6 — Tue, 17 Sep 2002 12:04:25 GMT

Hi,

Use an ignite backup from the primary server to install the OS on the second server. If you don't have ignite UX, you can download the same from this link,

http://www.software.hp.com/products/IUX/download.html

And here is the ignite faq,

http://www.software.hp.com/products/IUX/faq.html

Hope this helps.

Regds

Re: Disaster Recovery Server

Paula J Frazer-Campbell — Tue, 17 Sep 2002 12:06:49 GMT

John

For a start I would look at reversing the two machines. as a dual 1 Gig will outperform a Single 512Mb.

Also you have disparity on your total space available.

How is your OS and Data distributed on your live machine?

How big is your data?

Are you in a 25/7/365 environment.

In the event of a failure of your live server how much downtime can you allow?

Paula

Re: Disaster Recovery Server

John Flanagan — Tue, 17 Sep 2002 12:17:32 GMT

Hi!

To answer your questions.

The reason the machines are in this order is that my origonal machine has a 6 hour call to fix contract and is quick enough for the job. The spec on the second machine will allow me to do some testing from time to time.

I don't have an issue with disk space. I have 2 oracle db's each of which are about 5GB each.

I have one other issue. The tabe drive on my original machine is a DDS3 and the drive on my second machine is a DDS2.

John.

Re: Disaster Recovery Server

John Flanagan — Tue, 17 Sep 2002 12:24:28 GMT

The uptime required is 6am to 10 pm 5 days a week. Downtime during the day is an issue and will only happen in the case of a system failure. I do a complete system backup every night with oracle shutdown.

John.

Re: Disaster Recovery Server

Alan Casey — Tue, 17 Sep 2002 12:32:12 GMT

a 24Gb DDS tape shoul be read and writeable on both the DDS2 and DDS 3 drives.

Re: Disaster Recovery Server

John Flanagan — Wed, 18 Sep 2002 10:01:33 GMT

Can I get my DDS3 drive to write to an old DDS2 90m tape. A DDS3 tape is ejected from the DDS2 drive immediately.

John.

Re: Disaster Recovery Server

Paula J Frazer-Campbell — Wed, 18 Sep 2002 10:19:01 GMT

HI John

A DDS3 will read and write to DDS2 tapes but not vica versa.

How is your data laid down on your first server ?

Mirror on system?
Mirror on databases/

Paula

Re: Disaster Recovery Server

Ted Ellis_2 — Wed, 18 Sep 2002 14:12:27 GMT

I also see a great chance to upgrade off of 10.20 if that is something on your to do list...

also, are you only concerned with the databases being set for DR purposes? If that is the case, you may just want to go with a clean install of HP-UX 11.00 or higher... get the Oracle databases working and establish some sort of schedule for keeping the databases synched using log files (trans dumps).. whatever.

A couple of simple scripts should accomplish what you need there...

If the upgraded server works clean with your Database (more like when it does)... you should be able to take anything learned there and apply it to a very clean and quick upgrade of your primary server...

Ted

Re: Disaster Recovery Server

fg_1 — Wed, 18 Sep 2002 16:25:18 GMT

John

I would take a Make_Tape_Recovery -A -c -v of your primary system (ON A DDS2 TAPE)

Then on the second system boot off of that ignite tape and load your system. This will give you a duplicate layout on both systems.

GL.