Geographic Disk Mirroring
It is also possible to use specialized storage subsystems to geographically
mirror data across two sites. This mirroring is controlled by the storage
subsystem, and does not involve Oracle. It can be used for disaster
recovery, creating mirror sites for backup, or for creating mirrored sites
for reporting.
Geographically separated disk mirroring can be done with EMC Symmetrix with
SRDF and TimeFinder. This solution has been certified by Oracle. This
solution is good for inter-city mirroring. The solution is limited by the
bandwidth of the interconnect, and the latency associated with remote
mirroring that the application is willing to accept. In addition, new fibre
channel disk products are being offered by the hardware vendors which can
support up to 10km between mirrors. These products can also be used to
provide geographic disk mirroring solutions.
The greatest advantage of geographic disk mirroring over replication and
standby database is that these solutions have no potential for data or
transaction loss in the event of a disaster. Like synchronous replication,
these solutions wait for confirmation that the data has been written to the
mirror. However, in the event they do not receive this confirmation within
at specified period, they declare the mirror broken and continue functioning
on the primary (this behavior is configurable, but is recommended for high
availability applications).
http://technet.oracle.com//deploy/availability/
Last Update: 07/15/00 00:17:19
> -----Oorspronkelijk bericht-----
> Van: Jared Still [SMTP:jkstill_at_bcbso.com]
> Verzonden: 21-nov-00 16:36
> Aan: Multiple recipients of list ORACLE-L
> Onderwerp: Re: geo-mirroring
>
> On Tue, 21 Nov 2000 GKor_at_rdw.nl wrote:
>
> > Good day
> >
> > Anyone on this list who has geo-mirroring active ?
> > How to set this up with Oracle
> >
>
> Geo-mirroring is a new term for me. I can guess what
> it is, but an explanation of the term sent to the list
> would be appropriate.
>
> Jared
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Jared Still
> INET: jkstill_at_bcbso.com
>
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Received on Wed Nov 22 2000 - 01:40:13 CST
