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Enhancements Overview

Geyzerskiy DmitriyChief Architect, Microsoft Technologies

dimag@dbnet.co.il

Level 200

“NEW REGULATIONS WILL SOON SWELL IT WORKLOADS…“

InfoWorld, 12.11.2008

Agenda

1. Availability

3. Security

2. Scalability

High AvailabilityHigh AvailabilitySynchronous Mirroring with a witness. Automatic detection/failover. No data loss.

High ProtectionHigh ProtectionSynchronous Mirroring without a witness. Manual failover.No data loss, but possibly downtime.

High PerformanceHigh PerformanceAsynchronous Mirroring. Manual failover. Some data loss possible (but not guaranteed).

Availability EnhancementsDatabase Mirroring: Refresher

Availability Enhancements

Corrupt pages may be silently repaired on Mirror and Principal.

New DMV sys.dm_db_mirroring_auto_page_repair

allows tracking of previous 100 corrupt pages found in all

mirroring sessions.

New SQL Server Profiler “Database Suspect Data Page”

Event Class.

Log Compression

Adds up CPU cycles

Can be switched off using trace flag 1462

Database Mirroring

Availability Enhancements

Fast Manual Failover

In SQL Server 2005 the database on the mirror server is

restarted when a failover occurs. All database files are

opened sequentially.

New Performance Counters Log Bytes Redone from Cache/sec Log Bytes Sent from Cache/sec Log Compressed Bytes Rcvd/sec Log Compressed Bytes Sent/sec Log Harden Time (ms) Log Remaining for Undo KB Log Scanned for Undo KB Log Send Flow Control Time (ms) Mirrored Write Transactions/sec Send/Receive Ack Time.

Database Mirroring

Availability Enhancements

Backup Compression

In SQL Server 2005, only 3rd parties provide backup

compression technology.

Compression available in Enterprise Edition only, but all

compressed backups may be decompressed in any edition.

Adds extra CPU cost in favor of backup performance

improvement.

Hot-Add CPU

In SQL Server 2005 only hot-add memory is supported.

Subject to restrictions (hardware support, EE only, 64 bit

Windows Server 2008 Data Center or Enterprise Edition).

SQL Server 2008 should run RECONFIGURE to support new

CPUs.

Other goodies

Availability Enhancements

DBCC CHECKDB Improvements

Runs faster.

WITH EXTENDED_LOGICAL_CHECKS clause allows to control

long running checks (indexed views, XML indexes).

Deep-dive notification helps to detect corruption.

Other goodies

Availability Enhancements

Peer-to-Peer Replication

Changing PTP topology doesn’t require stopping all activity.

New graphical Topology Wizard.

Conflict detection (can be configured).

Other goodies continued

Availability Enhancements

Failover Clustering

SQL Server cluster nodes are set up individually.

Support for 16 nodes

New Cluster Validation Tool.

Geographically Dispersed Failover Clustering

VLANs should be set up to connect geographically

separated cluster nodes..

SAN replication.

Other goodies continued

Agenda

1. Availability

2. Scalability

3. Security

Scalability Enhancements Data Compression

Compression rate depends on the data.

ROW and PAGE compressions are available.

Dictionary compression for PAGE compression.

New DMV sp_estimate_data_compression_savings.

New Performance Counters for monitoring.

Graphical wizard for managing compression.

Scalability Enhancements

Service Broker

Diagnostic tool for debugging.

External activation (may launch external process).

Enhanced Management Studio support (Add, Edit, Enable).

Conversation priorities.

NUMA support

dm_os_memory_nodes

dm_os_memory_node_access_stats

dm_os_memory_nodes

dm_os_memory_node_access_stats

Scalability Enhancements

Lock Escalation

Partition Level Lock Escalation.

Escalation setting is per-table.

update

IX

X

FG1 FG1 FG1

PartitionedTable

Partition 1 Partition 2 Partition 3

Query 1ES

CA

LATE

Query 2

update

Agenda

1. Availability

2. Scalability

3. Security

Security Enhancements

Extensible Key Management

Use 3rd party key management systems.

Employ Enterprise wide encryption.

Separate data from keys with hardware security modules.

Security Enhancements

Transparent Data Encryption

In-place encryption at the database level.

Transparent to applications.

Encrypt data and log files.

Entire database is protected.

Performance cost is relatively small.

Backups are unusable without key.

Can be used with Extensible

Key Management.

Tools support.

SQL Server 2008

DEK

Client Application

Encrypted Data Page

Security Enhancements

Integrated Authentication Enhancements

Kerberos available with ALL protocols (TCP/IP, named pipes,

shared memory).

SPN may be specified in connection string.

Kerberos possible without SPN registered in AD.

Security Enhancements

Tracking Database Activity

SQL Server Audit is now a 1st class server object.

Automatically log actions to File, Windows Application or

Security Log.

Create an Audit Specification to include server and database

actions in an audit.

Audit Action Groups.

New Auditing DMVs.

Leverages high performance

Extended Events infrastructure.

Tools support.

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