Ns i Disaster Recovery

7/30/2019 Ns i Disaster Recovery

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Microsoft Cluster Service

Disaster Recovery

Featuring NSI Softwares

Real-Time Data Replication


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Small Business

Administration

Alfred E. Judd

Area Director

Small Business Administrationwww.sba.gov
http://www.sunbelt-software.com/http://www.sunbelt-software.com/


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Cost of Downtime

SQL

SQL Server

Server

Networked Workstations

Connected to the SQL Server


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Cost of Downtime

SQL

Access to SQL

Server Lost

XSQL Server

Server


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Cluster Server Scenario

Active SQL Server Networked Workstations

Connected to the SQL Server


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Active SQL Server

Access to

SQL

Server

Maintained

X


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Active SQL Server Networked Workstations

Connected to Cluster

Active Exchange Server


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Active Exchange Server

XActive SQL Server

Access to

SQL and

Exchange

Maintained


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MSCS Shared SCSI

Architecture

MSCS Cluster

Nodes

SCSI Disks

Shared

SCSI

Bus


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MSCS Shared SCSI

Architecture

X

MSCS Cluster

Nodes

SCSI Disks

Shared

SCSI

Bus


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Shared SCSI Distance

Limits

Shared SCSI

Distance

Limitation

of 82 Feet

MSCS Cluster

Nodes

SCSI Disks

Shared

SCSI

Bus


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Clustering with Fibre

Channel

Fibre Channel Hub

Fibre Channel

Distance

Limitation

of 10 KM

MSCS Cluster

Nodes


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The Worldwide

Organization

Internet or

Intranet

XCluster Server

providing highly

available

applications

to worldwide

clients

Client still

operational if

one node fails


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Geographic Disasters
http://www.nsisw.com/http://www.dell.com/http://c/DOCUME~1/ddemlow/LOCALS~1/Temp/writeTip(16)http://c/DOCUME~1/ddemlow/LOCALS~1/Temp/writeTip(16)http://www.dell.com/


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Disaster Recovery Site

Protection

How can you provide MSCS

style availability when your

backup machine is thousands

of miles away?

?

Internet or

Intranet


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Disaster Recovery Site

Protection

XHow can you provide MSCS

style availability when your

backup machine is thousands

of miles away?

?

Internet or

Intranet


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Double-Take Replication

Primary Double-Take

Server

Backup Double-Take

Server

1. Application writes data to file. It is

also captured by Double-Take

TCP/IP Network


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TCP/IP Network

2. Double-Take transmits the data across

the TCP/IP Network to the backup server.

Primary Double-Take

Server

Backup Double-Take

Server


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3. A copy of the data is written to the

disk on the backup server.

TCP/IP Network

Primary Double-Take

Server

Backup Double-Take

Server


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SQL Server

Double-Take Disaster

Recover

XDisaster

occurs in

primary city

SQL Server

Failover occurs

to backup site

Client application

sees minimal service

outage.

Internet or

Intranet


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SQL Server

Double-Take and MSCS

An MSCS cluster at

both the primary and

backup locations

XX X

Internet or

Intranet

with replicated data gives you

the most reliable environment

you can get.


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Data is queued on the primary machine if there is limited

bandwidth for transmission.

TCP/IP Network

Primary Double-Take

Server

Backup Double-Take

Server


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Data is transmitted at network speed. Scheduling and

bandwidth limiting tune Double-Take for your

particular network requirements.

TCP/IP Network

Primary Double-Take

Server

Backup Double-Take

Server


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A 2k-byte block is written to a large file on the primary

machine. Only the 2k-byte block is transmitted, reducing

network bandwidth use

TCP/IP Network

Primary Double-Take

Server

Backup Double-Take

Server


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Double-Take Flexibility

WAN


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One-to-One

One machine may be a

dedicated backup, or both

machines may be providing

disaster recovery for the other.

WAN


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One-to-One

WAN

One machine may be a

dedicated backup, or both

machines may be providing

disaster recovery for the other.


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Daisy Chain

Tie machines together in a

chain, each one passing

along data received from

the previous.

WAN


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WAN Daisy Chain

Use in a WAN environment

to provide a local backup as

well as a remote backup.

WAN


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One-to-Two

Send data to multiple

locations from a single

source. Provide data

data distribution.

WAN


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One-to-Many

Send data to multiple

locations from a single

source. Provide data

data distribution.

WAN


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Many-to-One

Centralize data from multiple

servers to a single machine.

Provides disaster recovery

and centralized backup.

WAN


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Double-Take Flexibility

The possibilities

with Double-Take are nearly

limitless!

WAN


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Double-Take with

ClustersDouble-Take

running on

MSCS

High Availability achieved with four machines,

two copies of the data and two sites!

Double-Take

running on

MSCS


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Replication on a Cluster

MSCS

Nodes

Group

Physical Disk

Network Name

IP Address

File Share

Replication Set

Double-

Take

Double-

Take

Replication

from

Node 1


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XMSCS

Nodes

Group

Physical Disk

Network Name

IP Address

File Share

Replication Set

Double-

Take

Double-

Take

Replication

from

Node 2


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Double-Take Failover and

MSCS

TCP/IP Network

IP Address

monitoring

And replication.

Group

File Share

IP Address


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MSCS

X

Group

File Share

IP Address

IP Address

monitoring

And replication.


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MSCS

TCP/IP Network

X

Data available

via Double-

Takes

Failover!

X


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Double-Take Licensing

1

2 3


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NSI Preferred Partners

Dell Computer

800-WWW-DELL

www.gigabuys.com

Sunbelt Software

888 NT-UTILS

or 727 562-0101

www.sunbelt-software.com

More information at www.nsisoftware.com


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Demonstration and

Training

Installing and Configuring

Double-Take on MSCS


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References

Disaster Recovery for MSCS

Step by Step Application Note

Script Templates

Product Documentation

Evaluation Downloads

http://www.nsisw.com/solutions/mscs


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Double-Take on the

Cluster

Group

File Share

Group

Exchange

Group

SQL

MSCS

Nodes Double-

Take

Double-

Take


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Demonstration Cluster

MSCS

Nodes

Group

Physical Disk

Network NameIP Address

File Share

Replication Set


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Demonstration Cluster

No loss of

clientconnectivity!

MSCS

Nodes

Group

Physical Disk

Network Name

IP Address

File Share

Replication Set


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MSCS

Nodes

Group

Physical Disk


File Share

Replication Set

Double-

Take

Double-

Take

Replication

from

Node 1


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MSCS

Nodes

Group

Physical Disk


File Share

Replication Set

Double-

Take

Double-

Take

Replication

from

Node 2


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DTCL Script Function

Make sure replication from node that previously owned

the group is stopped.

Connect from node that now owns the group to the

same target.

Start replication and a fast mirror to make sure that

synchronization is maintained.

Script templates atwww.nsisw.com/solutions/mscs


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References

Disaster Recovery for MSCS

Step by Step Application Note

Script Templates

Product Documentation

Evaluation Downloads

http://www.nsisw.com/solutions/mscs


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MSCS Disaster Recovery

Featuring NSI Softwares

Real-Time Data Replication

www.nsisoftware.com/solutions/mscs

Documents

Ns i Disaster Recovery