Chapter 12: Designing a Data- Archiving Solution MCITP Administrator: Microsoft SQL Server 2005 Database Server Infrastructure Design Study Guide (70-443)

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Presentation transcript:

Chapter 12: Designing a Data- Archiving Solution MCITP Administrator: Microsoft SQL Server 2005 Database Server Infrastructure Design Study Guide (70-443)

Reasons for Archiving Data Improved query performance Decreased disk space use Reduced maintenance time Reduced costs © Wiley Inc All Rights Reserved.

Steps to Create a Data Archive Plan 1.Determine business and regulatory requirements 2.Determine what data to archive 3.Select storage format 4.Develop a data-movement strategy 5.Design a replication topology if replication is used © Wiley Inc All Rights Reserved.

Determine business and regulatory requirements Establish how much data needs to remain online Identify busines requriements that determine length data needs to be reatined either online or in archive How much of the data is needed? Can summary tables be used? What is accessibility of data needed? What regulatory requirements are relevant © Wiley Inc All Rights Reserved.

Determine what data to archive Identify obsolete data Determine if archiving produces a savings in disk space cost Determine if there are performance benefits Establish the archiving interval © Wiley Inc All Rights Reserved.

Sructuring Archival Data Structure by using the following types of tables: –Partitioned tables –Normalized tables –Denormalized tables –Indexed views –Summary Tables © Wiley Inc All Rights Reserved.

Guidelines for Choosing Which Structure to Use Data Accessibility Requirements Storage costs © Wiley Inc All Rights Reserved.

Select Storage Format Type of Storage format: –Magnetic tape –Optical media –Physical disks Dedicated or shared server? © Wiley Inc All Rights Reserved.

Factors Effecting Storage Format Choice Cost Accessibility Shelf life Reliability & durability Securioty Changing technology © Wiley Inc All Rights Reserved.

Develop a Data-Movement Strategy Describes how archival data is moved from production to archive Considerations should include: –Frequency of data movement –Minimizing impact on production –Direct or indirect transfer –Security of data during movement –Data verification processes © Wiley Inc All Rights Reserved.

Replication Topology Defines relationship between servers and copies of data Dsignin should include: –Whether replicated data needs to be updated and by whom –Data distribution needs –Replication environment –Types of replications –How replication type and topologies align © Wiley Inc All Rights Reserved.

Replication Roles Publisher Distributor Subscriber SQL Server can be one, two or all three © Wiley Inc All Rights Reserved.

Replication Components Article Publication © Wiley Inc All Rights Reserved.

Replication Model Considerations Autonomy Latency Consistency © Wiley Inc All Rights Reserved.

Types of Replication Transactional Snapshot Merge © Wiley Inc All Rights Reserved.

Snapshot Replication Copies entire publication to subscribers each replication Created using Snapshot Agent Used primarily to establish the initial set of data © Wiley Inc All Rights Reserved.

Transactional Replication Standard Transactional Replication Transcational Replication with Updating Subscribers Peer-to-Peer Transactional Replication © Wiley Inc All Rights Reserved.

Merge Replication Most complex, most flexible Allows changes at both publishers and subscribers Conflicts are problem but resolvable © Wiley Inc All Rights Reserved.

Managing Replication Topology Develop and test a backup and restore strategy Script the replication topology Understand replication performance parameters Establish performance baseline Create thresholds and alerts Monitor the replication topology Validate data on periodic basis Adjust publication and distribution retention periods when necessary Understand how to modify publications if application requirements change © Wiley Inc All Rights Reserved.

Designing a Replication Strategy Determine requirement for replication with archival data Select a replication type Create a replication topology diagram Determine subscribers, distributors and publishers Select pull or push subscription Determine security requirements © Wiley Inc All Rights Reserved.