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Disaster Recovery / Strategies

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Disaster Recovery / Strategies Acknowledgements to Euan Wilson (Staffordshire University) What is a Disaster ? Very similar question to How long is a piece of string ? – PowerPoint PPT presentation

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Title: Disaster Recovery / Strategies


1
Disaster Recovery / Strategies
Acknowledgements to Euan Wilson (Staffordshire
University)
2
What is a Disaster ?
  • Very similar question to
  • How long is a piece of string ?

3
Dictionary Definitions
  • an occurrence that causes great distress or
    destruction
  • a thing, project etc. that fails or has been
    ruined

4
causes great distress or destruction
  • Has an effect on business functions and the way
    business operates
  • Could define it as a loss of business
    functionality (or partial loss) for a period of
    time
  • But still doesnt define what a disaster is

5
Problems of defining a disaster
  • For example
  • DIY store has a UK network
  • enabling all stores to view other stores stock
  • they can reserve / order stock for their
    customers from other stores stock
  • enabling them to hold less stock at each store

6
Stoke
Stone
Newport
Hub
Stafford
Derby
Telford
7
So what is a Disaster ? Example One
  • The Stafford site has a problem and is no longer
    connected to the other sites
  • Therefore its a disaster for Stafford
  • but it is a disaster for the organisation ?
  • The company has lost 1/6 of a particular business
    function
  • so is it an annoyance rather than a disaster ?

8
  • But is might be a disaster if business is lost
  • or the fault persists for a period of time
  • what fall back methods are available
  • use of the phone / fax
  • pen and paper
  • will these overcome the disaster ?
  • If so, its not a disaster

9
Systems that need to be in place
  • Network
  • need to have in place a recovery strategy that
    gets the network up and functional within an
    acceptable time period ?
  • So what is that time period
  • 30 minutes, 4 hours, 1 day
  • have to analyse cost of down time

10
  • Telephone
  • Possible the most important
  • Nice easy one !
  • Have a contract with a mobile telephone company
    to provide instant mobile lines
  • Second contract with land line company to
    provide land lines within 24 hours
  • or something else!

11
  • Buildings ?
  • If they are destroyed what happens
  • New premises
  • Portable cabins
  • Rented
  • Work from home

12
  • Hardware
  • Needs to up and running before network ?
  • In-house or bought-in support ?
  • Depends on allowable downtime
  • Software
  • Same as for hardware
  • Example
  • Oracle DBA at Brussels Airport is allowed to have
    a non-functional database for 30 minutes each year

13
Example two
  • CREST
  • Bank of England Electronic Share Settlement
    System
  • System that allows permitted stock brokers to
    deal with share on-line
  • UK wide network
  • FTSE companies and more

14
  • Each member of CREST has to response to a share
    dealing with 2 hours of the start of the
    function.
  • So what would be a disaster ?
  • A loss of the system for more than 1 hour ?
  • Recovery
  • A second identical system

15
  • Expensive
  • Too expensive, but perhaps necessary
  • It was actually mandatory
  • But needed
  • the fines for not completing the transactions is
  • barring from the system
  • loss of image
  • loss of business
  • loss of reputation

16
Example three
  • Same network layout as for first example
  • but
  • System for dealing with Police cells
  • Systems needs to check for
  • Outstanding warrants
  • Bail conditions
  • Other Forces requirements
  • etc. etc.

17
Timeliness?
  • When the person is processed the Duty Officer
    needs to be aware of all possible data available.
  • Each area keeps their own data I.e. Stafford
    records data about Stafford residents etc.

18
  • Stone link fails
  • Disaster ?
  • Duty Officer is not left with a complete picture
  • Fall back plans ?
  • Use of telephone / fax etc. ?
  • System needs to have in-built redundancy

19
Creating a Disaster recovery Strategy
  • Stage one
  • Define organisations view of a disaster
  • maybe one line
  • loss of business functions for more than (a
    time period)
  • maybe series of scenarios

20
  • Stage two
  • Define disaster scenarios
  • Fire, flood, acts of God, .
  • Bomb, sabotage, .
  • Loss of power etc. etc.
  • Plane crash
  • Loss of network, telephone system
  • Define all possible solutions

21
  • Stage 3
  • Recommend solutions
  • Fire
  • New premises
  • Portable cabins
  • Shutdown period
  • etc.

22
  • Stage 4
  • Implement
  • All will have
  • Cost
  • Contract
  • and review
  • Conditions and reliance's change
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