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 databaseTables 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

Availability Synchronous, asynchronous, replicate-on-write, scheduled replication

Software-based replication

(availability)

Synch

Asynch Journaled

replicate-on-write

Scheduled snapshot replication

VVM Storage Replicator Data Migrator

DoubleTake EverStor

Software-based replication (2)

(availability)

Synch

Asynch Journaled

replicate-on-write

Scheduled snapshot replication

Sun StorEdge QFS RepliStor IBM Informix Dynamic Server

Falcon’s IPStor

Hardware-based replication

(availability)

Synchronous

Asynchronous Journaled

replicate-on-write

Scheduled snapshot replication

Actona TotalStorage Fast100 LeftHand RemoteIP Copy

EMC Symmetrix

Hardware-based replication (2)

(availability)

Synchronous

Asynchronous Journaled

replicate-on-write

Scheduled snapshot replication

Sun StorEdge PeerStorage Array Intransa

Software-based replication

(confidentiality/integrity)

Cloning

Delta/block changes

CHAP

RADIUS

VVM

Storage Replicator

Data Migrator

DoubleTake

EverStor

Software-based replication (2)

(confidentiality/integrity)

Cloning

Delta/block changes

CHAP

RADIUS

Sun StorEdge QFS

RepliStor

IBM Informix Dynamic Server

Falcon’s IPStor

Hardware-based replication

(confidentiality/integrity)

Cloning

Delta/block changes

CHAP

RADIUS

Actona

TotalStorage Fast100LeftHand RemoteIP Copy

EMC Symmetrix

Hardware-based replication (2)

(confidentiality/integrity)

Cloning

Delta/block changes

CHAP

RADIUS

Sun StorEdge

PeerStorage Array

Intransa