BACKUP/MASTER:Replication

Dorian CougiasCEONetwork Frontiers

An overview of replication

What is being

replicated?

• Volume

• File-based

• Database-based

How it is being

replicated?

• Asynchronously

• Synchronously

• “Timed” push or

pull

• Caching

Anatomy of a database

Tables of information

Index of tables

Transaction Log for repair in the event of failure

Cache that sits in RAM

Database backup

Restore from tape/disk after a crash

Asynchronous replication

Non-consistent operation

Fast recovery

Synchronous replication

Non-consistent operation

Transfer to secondary host

Volume and file-based replication

Synchronous

Asynchronous

Block level replication (BLR)

BLR (2)

BLR (3)

File-based replicationFile-basedReplicator

OperatingSystem(1)

(2)

(3)

ReplicatorJournal

(2)

File-basedReplicator

OperatingSystem

(3)

(4)

Any IP based network

Assured security issues

Accountability Reporting, provisioning

Confidentiality CHAP, RADIUS

Integrity Cloning, delta changes

AvailabilitySynchronous, asynchronous, replicate-on-write,

scheduled replication

Software-based

replication

(availability)

Synch

Asy

nch

Jou

rnale

d

replica

te-o

n-w

rite

Sch

edule

d sn

apsh

ot re

plica

tion

VVM Storage Replicator Data Migrator

DoubleTake EverStor

Software-based

replication (2)

(availability)

Synch

Asy

nch

Jou

rnale

d

replica

te-o

n-w

rite

Sch

edule

d sn

apsh

ot re

plica

tion

Sun StorEdge QFS RepliStor IBM Informix

Dynamic Server

Falcon’s IPStor

Hardware-based

replication

(availability)

Synch

ron

ous

Asy

nch

ron

ous Jo

urn

ale

d

replica

te-o

n-w

rite

Sch

edule

d sn

apsh

ot re

plica

tion

Actona TotalStorage

Fast100 LeftHand

RemoteIP Copy

EMC Symmetrix

Hardware-based

replication (2)

(availability)

Synch

ron

ous

Asy

nch

ron

ous Jo

urn

ale

d

replica

te-o

n-w

rite

Sch

edule

d sn

apsh

ot re

plica

tion

Sun StorEdge PeerStorage Array Intransa

Software-based

replication

(confidentiality/

integrity)

Clo

nin

g

Delta

/blo

ck chang

es

CH

AP

RA

DIU

S

VVM

Storage Replicator

Data Migrator

DoubleTake

EverStor

Software-based

replication (2)

(confidentiality/

integrity)

Clo

nin

g

Delta

/blo

ck chang

es

CH

AP

RA

DIU

S

Sun StorEdge QFS

RepliStor

IBM Informix

Dynamic Server

Falcon’s IPStor

Hardware-based

replication

(confidentiality/

integrity)

Clo

nin

g

Delta

/blo

ck chang

es

CH

AP

RA

DIU

S

Actona

TotalStorage

Fast100

LeftHand

RemoteIP Copy

EMC Symmetrix

Hardware-based

replication (2)

(confidentiality/

integrity)

Clo

nin

g

Delta

/blo

ck chang

es

CH

AP

RA

DIU

S

Sun StorEdge

PeerStorage Array

Intransa