Disaster Recovery - PowerPoint PPT Presentation

Loading...

PPT – Disaster Recovery PowerPoint presentation | free to download - id: 3fa57e-Y2I1Z



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Disaster Recovery

Description:

Disaster Recovery By Gopi.S Disaster ? Goals of Disaster Recovery manage both planned and unplanned situations with minimal or zero disruptions Why DRS is important ? – PowerPoint PPT presentation

Number of Views:368
Avg rating:3.0/5.0
Slides: 58
Provided by: aabd9
Learn more at: http://i-musicland.com
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Disaster Recovery


1
Disaster Recovery
  • By Gopi.S

2
Disaster ?
natural or human-made hazard
3
Goals of Disaster Recovery
  • manage both planned and unplanned situations with
    minimal or zero disruptions

4
You Dont Need A Natural Disaster To Have A
Disruption!
  • Site Destruction/Disruption
  • Mechanical Equipment Failure
  • Software Failure
  • Human Error
  • Scheduled downtime

5
Why DRS is important ?
Business Continuity
6
Business Continuity
  • Ability of the key operations of a firm to
    continue without stoppage, irrespective of the
    adverse circumstances or events

7
Why Business Continuity is Important?
Shell Outages can cost 100s of millions of
dollars in a single day
8
Technology used for DRS.
  • HA (High Availability) RedundacyClustering,Mult
    ipathing
  • Distance Planning DWDM,Dark Fiber
  • Replication Technology Insystem replication,
    offsite replication

9
High Availability -
  • The ability for a system or application to
    immediately continue its mission after loss or
    damage to system components, systems, facilities
    and data.

10
- Redundancy is the duplication of components up
to and including the entire fabric to prevent
failure of the total SAN solution
- Resiliency is the capability of a fabric
topology to withstand failures
11
Redundancy
Clustering
12
Redundancy Clustering
  • Primarily for the purpose of improving the
    availability services
  • Operate by having redundant nodes, which used to
    provide service when system component fails (
    eliminating single point of failure)
  • Minimum requirement for HA cluster 2 nodes
  • Also used for load balancing

13
A Quick Look At Clustered Storage
Ctl 1 Ctl 2
Ctl1 Ctl2
Both Ctl share control of a common storage space
Each Ctl controls its own storage space
14
Resiliency
15
Single fabric non resilient design
  • Here we can see that if one switch in the single
    fabric of the SAN fails, we will lose connection
    from the top to the bottom of the fabric

16
Single fabric resilient
  • even if one of the switches in the single fabric
    SAN fails, we can still access the storage
    devices connected to the bottom tier switches
    from the servers connected to the top tier of
    switches.

17
Redundant fabric non resilient
  • Even if one of the switches in the SAN fabric
    failed, we can still access the storage device in
    the bottom tier from the server at the top tier.
  • Even though the fabric itself is not resilient,
    the data path availability is ensured through the
    redundant fabric.

18
Redundant fabric resilient
  • Even if one of the switches in the SAN fabric
    failed, we can still access the storage device on
    the bottom tier from the server at the top tier.
  • With this type of design we are basically
    protecting at two levels.
  • First, we are protecting against switch failure
    and secondly, we are protecting against a failure
    of the whole fabric.

19
Which of these SANs pictured below is a resilient
dual-Fabric?
  • A
    B C
    D

20
Redundancy
Multipathing
21
Fabric 1
1
2
1
Fabric 2
How many paths to Lun1 2 ?
22
Redundancy Multipathing
  • Provide multiple paths between a host and a
    device (LUN).
  • Redundancy for improved, reliability ,higher
    bandwidth, for improve performance
  • Usually Separate device driver/software is used
    following capabilities
  • Enhanced Data Availability
  • Automatic path failover and recovery to
    alternative path
  • Dynamic Load balancing
  • Path selection policies
  • Failures handled
  • fibre connection cable, host interface adapters
  • Additional software needed for ensuring the host
    sees a single device.

23
You need path management Software!
How can the host manage path failures?
1
24
Purpose of the Dynamic Link Manager Software
  • A server based software that provides path
    failover and load balancing capabilities
  • Provides
  • Support for fibre channel connectivity
  • Automatic path discovery, which supports a SAN
    environment
  • Automatic path failover and failback
  • Two applications exist Command Line Interface
    (CLI) and GUI
  • Support for Hitachi TagmaStore Universal
    Storage Platforms/Network Storage Controllers

25
ExHDLM-Dynamic Link Manager
26
Benefits
  • Provides load balancing across multiple paths
  • Utilizes the hardwares ability to provide
    multiple paths to the same device
  • Provides failover protection by switching to a
    good path, if a pathFails
  • Removes HBA as single point of failure
  • Automatically detects failed path and reroutes
    I/O to alternate path
  • Automatically discover host bus adaptors (HBAs)
    and LUNs in SAN environment
  • Uses round-robin or extended round-robin to
    balance I/Os across available paths
  • Provides tools to control and display the path
    status
  • Supports the most popular cluster technologies
  • Supports HBA vendors and standard open drivers
  • Provides GUI and CLI support
  • Provides error logging capability

27
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
(No Transcript)
31
(No Transcript)
32
DISTANCE PLANNING
33
Long distance with DWDM/Dark Fiber Extended SAN
Extended storage connectivity applications
include Remote mirroring/replication, vaulting,
archiving, clustering, distributed computing,
data migration, remote and branch offices,
backup, SAN, NAS
34
What is Multiplexing?
  • Definition Multiplexing is sending multiple
    signals or streams of information through a
    circuit at the same time, in the form of a
    single, complex signal and then recovering the
    separate signals at the receiving end.
  • Basic types of multiplexing include frequency
    division (FDM), time division (TDM), and
    wavelength division (WDM).
  • TDM and WDM being widely utilized by telephone
    and data service providers over optical circuits.

35
  • Time Division Multiplexing (TDM) is a method of
    combining multiple independent data streams into
    a single data stream by merging the signals
    according to a pre-defined sequence. Each
    independent data stream is then reassembled at
    the receiving end based on the sequence and
    timing.

36
  • Wavelength Division Multiplexing (WDM) combines
    multiple optical TDM data streams onto one fiber
    through the use of multiple wavelengths of light.
    Each individual TDM data stream is sent over an
    individual laser transmitting a unique wavelength
    of light.

37
Dark Fiber
  • A dark fiber is simply an unused fiber that is
    already installed.
  • The main reason that there are dark fibers is
    because much of the cost of installing fiber
    optic cables and networks are associated with the
    planning and routing, obtaining permissions,
    creating ducts and channels for the cables, and
    finally installation and connection of the
    network.
  • As such, economies of scale comes into play and
    it makes more sense to install significantly more
    fiber than was needed at the time, in preparation
    for future demand or just purely for redundancy.

38
  • Acronym Name
    What is it
  • CWDM Coarse Wave Division
    Multiplexing Lower cost, shorter distance WDM
  • DWDM Dense Wave Division
    Multiplexing Long distance, high bandwidth
  • FCIP Fibre Channel over IP
    Extend Fiber Channel
    over IP network
  • WDM Wave Division Multiplexing
    Optical multiplexing

39
  • Acronym When to use
    Caveats
  • CWDM Relative short distance
    Limited compared to WDM/DWDM
  • DWDM Long distance, high
    bandwidth More expensive than
    CWDM/WDM
  • FCIP Fibre Channel over
    distance Creates tunnel, collapses
    fabrics
  • WDM Medium distances
    Less bandwidth than DWDM

40
How CWDM/DWDM/WDM works





GbE

GbE





ATM

ATM

MUX

MUX





FC

FC

ESCON

ESCON

Optical Amplifiers
FICON

FICON

Light Signal

(Lambdas)

Light Signal

(Lambdas)


Lambdas (Wavelengths)
41
WDM/DWDM example
Mainframe
Open System



Main Site

Branch Site

Gb Ethernet

FCP

FICON

Fibre Channel
FCP

IP



ESCON

Gb Ethernet
DWDM

Dark Fiber

Recovery Site

MAN

Secondary Site

Gb Ethernet


ESCON

FCP

DWDM
FICON



Storage
Mainframe
Source Resilient Storage Networks (Elsevier)
Wave division multiplexing (WDM), dense WDM
(DWDM) and coarse WDM (CWDM) provide optical
multiplexing to increase bandwidth and distance
to Support more networks and applications on a
given fiber cable..
42
FCIP example
FCIP Switch
FCIP Switch
Tunnel
Storage
Router Extender
Storage
Servers
Servers
Tape
LAN Site-A
LAN Site-B
Source Resilient Storage Networks (Elsevier)
Fibre Channel (FC) over IP (FCIP) encapsulates
and sends FC frames over a IP based network
effectively creating a tunnel or virtual FC ISL. .
43
Replication ?
44
Replication Technologies
What Is Data Replication Technology?
  • Software and hardware for making additional
    copies of existing datato improve data
    availability.

45
Why is Data Replication Important?
  • Data Replication is a solution for protection
    against loss
  • Data Replication is key to improving data
    availability for Business Continuance.

46
How Can Data Replication be Useful?
  • Data Replication is a strategic technology, to
    eliminate
  • Long interruptions for backup...
  • Unacceptable recovery times
  • Production delays to copy data
  • Hard downtime to install new disks

47
Insystem ReplicationPoint in Time Copy
  • Replicate information on within a storage system
    without distrupting operations
  • Once copied ,data can be used for -
  • - data mining
  • -backup and recovery
  • - testing and development

48
Ex HDS ShadowImage
49
EMC TimeFinder Point-in-Time Copy
50
Hitachi Shadow Image Point-in-Time Copy
51
IBM FlashPoint-in-Time Copy
52
Offsite Replication Remote Copy
  • Purpose of remote copy is to protect the data in
    the event of a business interruption at the
    customers production location

53
Offsite replication ExTrueCopy (Sync)
Cluster2
Cluster1
DWDM/Dark Fiber
DC2 Storage B
DC1 Storage A
Acknowledgment completion to host
54
Sycnronous-Advantages
  • Smallest exposure to data loss
  • Fast Disaster recovery

Sycnronous-Disadvantages
  • Primary host performance impact
  • Short distance only

55
Ex TrueCopyOffsite replication (ASync)
Cluster2
Cluster1
DC2 Storage B
DC1 Storage A
56
ASycnronous-Advantages
  • Least impact to host
  • Long distance are supported

ASycnronous-Disadvantages
  • Data at the backup location can lag some number
    of seconds behind the primary image

57
?
About PowerShow.com