[Maybe Spam] Re: [DB2-L] [Maybe Spam] [DB2-L] OS/390 offsite disk mirroring/recovery

Raymond Bell

[Maybe Spam] Re: [DB2-L] [Maybe Spam] [DB2-L] OS/390 offsite disk mirroring/recovery
Steve,

Ordinarily we're bang up-to-date. Well, kind of. In a real DR 'invocation'
we'd be bang up-to-date, as PPRC will have been faithfully replicating
updates in realtime. Any inflight/indoubt URs will be dealt with
automagically when DB2 comes up at the DR site. I hope.

Our actual DR test involves starting up at a pre-arranged 'disaster' point.
That point is established each night during our regular processing, when we
snap all the volumes we'll need. Currently we suspend the DB2 log during
that 4 minute period, but it's pointless for us in a 'real' DR as we'll rely
on PPRC, and if that doesn't work in a real DR we'll fall back to the
conditional restart stuff built for us by the BMC tools, which will get us
to the same point as we manually archive the logs just before the snap and
CRestart to that RBA - so the same point, only arrived at differently.

It sounds like the way we do our DR tests - suspend the log, snap every
volume that moves, resume the log - would be ideal for you. It means you'll
be as current as your last snap, which is better than nowt. Depends how
warm you want your site to be.

Cheers,


RayMOND Bell
Database Administrator

-----Original Message-----
From: DB2 Data Base Discussion List [mailto:[login to unmask email] On Behalf
Of Steve Lamb
Sent: 19 January 2007 13:37
To: [login to unmask email]
Subject: [Maybe Spam] Re: [DB2-L] [Maybe Spam] [DB2-L] OS/390 offsite disk
mirroring/recovery

Ray,

Thanks for that. How "current" are you at the second site when you invoke
DR?
It now looks like they want to go for an asynch link to the second site,
with sorting out DB2 and IMS recovery "manually", rather than having PPRC
POC's or whatever .

Steve

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Steven Lamb

Re: OS/390 offsite disk mirroring/recovery
(in response to Raymond Bell)
Looks like there's been another change of plan and it would be a
synchronous link (data centres a lot closer together than originally
thought).

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Raymond Bell

Re: OS/390 offsite disk mirroring/recovery
(in response to Steven Lamb)
Good grief. Hey, maybe what they need is a sod-off enormous Y-connector,
like what you use for an RJ-11 phone plug but much bigger. Then they could
plug the two DASD arrays into both ends and leave it at that. Should run
off a 240 volt 12amp fused wall socket no probs...

-----Original Message-----
From: DB2 Data Base Discussion List [mailto:[login to unmask email] On Behalf
Of Steve Lamb
Sent: 23 January 2007 14:52
To: [login to unmask email]
Subject: Re: [DB2-L] OS/390 offsite disk mirroring/recovery

Looks like there's been another change of plan and it would be a synchronous
link (data centres a lot closer together than originally thought).

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Any information contained in this message may be subject to applicable terms and conditions and must not be construed as giving investment advice within or outside the United Kingdom.

The following companies are subsidiary companies of the Legal & General Group Plc which are authorised and regulated by the Financial Services Authority for advising and arranging the products shown: Legal & General Partnership Services Limited (insurance and mortgages), Legal & General Insurance Limited (insurance), Legal & General Assurance Society Limited
(life assurance, pensions and investments), Legal & General Unit Trust Managers Limited and Legal & General Portfolio Management Services Limited (investments).

They are registered in England under numbers shown.
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Legal & General Partnership Services Limited: 5045000 Legal & General Assurance Society Limited: 166055 Legal & General (Unit Trust Managers) Limited: 1009418 Legal & General (Portfolio Management Services) Limited: 2457525 Legal & General Insurance Limited: 423930

They are registered with the Financial Services Authority under numbers shown. You can check this at www.fsa.gov.uk/register

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Steven Lamb

Re: OS/390 offsite disk mirroring/recovery
(in response to Raymond Bell)
Alternatively management could be wired up to it, with a transformer
involved somewhere :)

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David Seibert

Re: OS/390 offsite disk mirroring/recovery
(in response to Steven Lamb)
Raymond,

I would prefer that you didn't use such offensive terminology as Good
grief.

Thank you

Dave

-----Original Message-----
From: DB2 Data Base Discussion List [mailto:[login to unmask email] On
Behalf Of Bell, Raymond
Sent: Tuesday, January 23, 2007 10:08 AM
To: [login to unmask email]
Subject: Re: [DB2-L] OS/390 offsite disk mirroring/recovery

Good grief. Hey, maybe what they need is a sod-off enormous
Y-connector, like what you use for an RJ-11 phone plug but much bigger.
Then they could plug the two DASD arrays into both ends and leave it at
that. Should run off a 240 volt 12amp fused wall socket no probs...
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