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SageIE: Backups and Disaster Recovery

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Sage-IE 8th July 2003. Sage-IE Backups and Disaster Recovery. Covered in ... Only for a short period of time, or until data can be re-entered (if at all) ... – PowerPoint PPT presentation

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Title: SageIE: Backups and Disaster Recovery


1
Sage-IEBackups and Disaster Recovery
  • Andrew Barnes
  • http//www.ramsesit.co.uk
  • andrewbarnes_at_ramsesit.co.uk

2
Covered in this session
  • Backups
  • Disaster Recovery
  • As SysAdmins, the focus may appear to be on the
    data-recovery component gt
  • Examples
  • Questions

3
Why Backup?
  • The obvious answer for System Administrators
  • To protect data against a myriad of unforseen
    circumstances
  • The not-so-obvious answer for System
    Administrators
  • To protect business processes and procedures
    against the loss of critical staff or other
    non-technical disasters

4
What to back up?
  • Depends upon your organisational needs
  • Doesnt just cover the actual data
  • System Information/Configuration
  • System Information
  • Disk Information
  • Network Configuration
  • Application Information/Configuration
  • Business Backups
  • Business Processes
  • Technical Procedures
  • Staff Details

5
When to back up?
  • A number of factors
  • What the data consists of
  • How often your data changes
  • What level of redunancy you require
  • How much data you have that requires backing up
  • How much data you can afford to be without
  • How long can you afford to be without the data
  • Only for a short period of time, or until data
    can be re-entered (if at all)
  • Depends on backup medium utilised
  • Can become a Need versus Cost question

6
How to back up?
  • Purely Hardware
  • Disk Mirroring
  • On local disks
  • On off-site disks (EMC, HDS, etc)
  • Synchronous versus Asynchronous Mirroring
    Performance implications
  • RAID
  • Software with Hardware
  • Backup application
  • Unix/Windows/Macintosh applications tar, gzip,
    dump, dd, winzip, StuffIt, others
  • Commerical Applications TSM, Legato, Backup
    Exec, others
  • Backup Levels
  • The best solution? A combination of both

7
RAID 5 on Floppy Disks?
  • One would argue this is not an option but you
    gotta admit it looks kinda cool gt

8
Verifying Integrity of Backups
  • Two of the most crucial components of backups
    consist of
  • Making sure you have backed up the correct/enough
    data
  • Making sure you can recover specific data as and
    when required
  • Defining the backup retention period is crucial
    espectially if there are legal requirements (aka
    Traffic Data Retention!)
  • There is an important point here Data Recovery
    must be tested on a regular basis
  • An email/message stating that a backup has
    completed successfully is not sufficient
  • If backing up your data is half the battle,
    recovering it makes up the other half
  • This is further complicated the longer your
    backups are required

9
Storage of Backup Media
  • Another consideration for organisations is
    whether off-site backups are required
  • Offsite backups can take different forms
  • The home of a trusted employee
  • Another office
  • Third Party Organisation
  • Care must be taken to carefully evaluate the need
    of off-site storage versus the cost, versus the
    security associated with each of the options
  • In particular, the cost of data retrieval

10
Security of Backups
  • There are three main ways to get access to your
    data
  • Remote access to a system
  • Physical (local) access to a system
  • Access to the backup system used
  • Your companys data is only as secure as its
    backups

11
Why so much time on backups?
  • The answer here should be obvious
  • The ability to retrieve important corporate
    information is crucial to business continuity
  • I have seen too many companies, and individuals,
    trivialise the issue of failed backups
  • It is important to note that data recovery is
    only one part of of Backups and Disaster
    Recovery
  • Ala the next section of this presentation

12
Disaster Recovery
  • What constitutes Disaster Recover?
  • One persons distaster might be another persons
    inconvenience
  • Are you faced with a Disaster, or with an
    application/service outage
  • This depends upon your terms of service SLA
  • There are two aspects two Disaster Recovery
  • Data Recovery
  • Business Recover

13
Business Recovery
  • Business Continuity Plan(ing) (BCP)
  • Business Continuity Management (BCM)
  • Both the above acronyms describe a critical
    component of Disaster Recover
  • Planning
  • Management
  • BCP protects an organisation from loss of
  • Site
  • Critical Employees
  • Organisation/Operational Procedures

14
Components of BCP 1
  • Identify Key Personnel
  • In the event of a disaster, what is the minimum
    number of staff required to either
  • Continue service Business As Usual (BAU)
  • Restore service
  • Ensure BAU where possible, and restore those that
    have been lost
  • Contact Details of these personnel
  • Alternative Site
  • Alternative Site in the event of a particular
    data centre
  • Hot or Cold Site
  • Alternative Equipment
  • Depends on site used (hot/cold)
  • Use of On-Call equipment is often useful

15
Components of BCP 2
  • Identify Applications required to support
    services
  • Firewall GUIs
  • Application Management Utilities
  • You may be required to (re)build a new management
    workstation
  • Identify Access Mechanisms
  • Physical Access requirements
  • Network Access requirements
  • Dont firewall yourself off from your network
  • Single/Dual Point of Access

16
Components of BCP 3
  • Critical Login Information
  • Disaster Recovery Pack
  • Stationary
  • Installation Media
  • Other
  • Dont bite off more than you can chew consider
    the use of a Service Continuity Plan
  • A more modular approach to Business Continuity
    Planning and Management
  • Also useful for identifying priorities in the
    event of problems

17
System/Data Recovery
  • As per previous slides
  • Remember - backing up data (and the ability to
    recover it), is all for nothing if you dont know
    the system configuration
  • System Information/Configuration
  • Network Configuration
  • Application Information/Configuration
  • There is no point in having the above information
    stored on a system that is itself lost
  • Hard copy
  • rsync of System Information Site to an
    alternative location

18
Data Centres
  • Again, the number of data centres depends on your
    companies requirements
  • Speed of recovery
  • Cost to implement and maintain
  • One, Two or even more?
  • Hot or Cold data centres
  • The more data centres required, the more complex
    the network (and system) infrastructure
  • Especially where both sites are live at any one
    time
  • The more access points to your network, the
    greater the risk of system/network compromise
  • Did I mention cost?

19
Planning for a Disaster
  • You need to collect
  • Business D/R Information
  • System/Network D/R Information
  • Make sure that all staff know
  • That you even have a D/R plans
  • Where to find your D/R plan
  • How to activate the D/R plan
  • Under what circumstances a D/R plan should be
    activated
  • Where possible, identify a recovery priority
    (incorporating dependancies)

20
Planning to Recover
  • Documentation
  • BCP (Business and Data)
  • Every time you change a component, you should
    update your BRP
  • TEST your recovery solution, on a regular basis
  • If you factor in BCP as part of any new service,
    you will help ensure the continuity of your
    business in the event of any number of potential
    disasters

21
Examples
  • Downtime Table
  • Useful when setting SLAs
  • Tape Backup Levels
  • Data Storage
  • Iron Mountain
  • Disaster Recovery
  • The Wall Street Journal September 11th 2001
  • Lehman Brothers September 11th 2001

22
Downtime Per Year (count of 9s)
23
Tape Backup Levels
24
Iron Mountain
  • Paper Records Stored approx 207 million cubic
    feet
  • Computer Media Stored gt 80 million pieces
  • Microfilm Stored gt 50 million pieces
  • Number of Retrievals and Re-files each year gt
    72 million
  • There is a key point here The cost of off-site
    storage with a 3rd party organisation could end
    up costing more than the actual storage itself

25
The Wall Street Journal 9/11
  • Had extensive BRP
  • Based on experiences of the 1990 power blackouts
    in NY
  • Primary site located across the road from the
    Twin Towers
  • BRP Plan activated by senior management
  • Elected to abandon the primary site
  • Full edition of paper released the following day
  • Complete with current stories, including
    eye-witness reports on the collapse of the Twin
    Towers

26
Lehman Brothers 9/11
  • Primary Sites in both Tower 1, as well as 1, 2, 3
    WTC (across the road from the Towers)
  • Moved to BRP Site
  • Performed Cash Management functions the same day
  • Fixed-Income Securities trading on next day
  • 400 traders online when NYSE re-opened on the
    17th September
  • Testimony to the excellent BRP solution planned
    by the company

27
The End
  • Questions?

28
References
  • http//www.uni-mainz.de/neuffer/scsi/what_is_raid
    .html
  • http//ohlssonvox.8k.com/fdd_raid.htm
  • http//www.ironmountain.com
  • http//www.sysadminmag.com
  • http//www.tldp.org/LDP/sag/x2615.html
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