Disaster Recovery Fallback Sites

From: VIVEK_SHARMA <VIVEK_SHARMA_at_infy.com>
Date: Mon, 03 Sep 2001 01:14:14 -0700
Message-ID: <F001.003809D6.20010903002606@fatcity.com>

MY Qs. IN CAPITALS BELOW :-

Storage-Array/OS fail-over :- 
--------------------------
Storage-array vendors, most notably EMC, have taken the concept of

operating system fail-over one step further. Noting the drawbacks of clustered hardware in the area of disaster recovery and rolling upgrades, they have taken the basic fail-over mechanism at the operating system level, and replaced the clustered hardware concept with the idea of replicated storage-arrays.
So, instead of clustered nodes sharing the data by sharing the same physical disk drives, vendors such as EMC introduced storage-array replication.

All transactions written to one storage-array would be replicated almost instantaneously to another storage-array.

Qs. IF THE DATABASE CRASHES IN THE PRIMARY STORAGE ARRAY BOX , WILL IT BE COPIED TO THE 2nd REPLICATION ARRAY THEREBY CAUSING IT TOO HOLD A CRASHED COPY OF THE DATABASE TOO ? These two storage-arrays can be geographically separated, though the network between them must be extremely large (i.e. OC3 or higher). The computers, then, are not clustered, and do not require the additional hardware and operating system software to achieve clustering. Products include EMC Symmetrix Data Replication Facility (SDRF), and Oracle Support has white papers describing certification testing performed using SDRF at Oracle.

> -----Original Message-----
> From: VIVEK_SHARMA
> Sent: Sunday, September 02, 2001 3:12 PM
> To: 'gajav_at_yahoo.com'; 'ORACLE-L_at_fatcity.com';
> 'oracledba_at_lazydba.com'
> Subject: Disaster Recovery Fallback Sites
>
>
> Disaster Recovery Fallback Sites :-
> --------------------------------
> What are the Different Solutions/methodologies implemented ?
> Is Standby Database the best Solution ?
> What are the Harware/O.S. Solutions available ?
> Which would be better using Oracle or O.S. Solutions ?
> Any papers , Links , best practices ?
>

--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: VIVEK_SHARMA
  INET: VIVEK_SHARMA_at_infy.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).

Received on Mon Sep 03 2001 - 03:14:14 CDT