Christian BoltonCoeo

@ChristianBolton

http://sqlblogcasts/blogs/christianbolton

christian@coeo.com

SQL11 What’s Coming

SQL Azure

Workload AppliancesData WarehouseConsolidationOLTPBI

SQL Server 2008

SQL Server “Denali”

Infrastructure and server software in a single integrated solution

Appliances

Data Warehousing

Business Intelligence

Private Cloud (Virtualization & Consolidation)

OLTP – Online Transaction Processing

Optimized for Business goals, optimized for Resource Usage, optimized per workload

High Availability EDIM

AlwaysOn

SSIS Server

Security & Manageability

User-Defined Server Roles

Web & Breadth

PHP Driver

Scalability and Performance

> 1000 Partitions / table

Business Intelligence

Unified Semantic Model

Data Lineage

Database Replay

Semantic Platform

Crescent

Application Centric Failover

Data Quality

Contained Database Authentication

LocalDBFast FileStream

UTF-16

Online Operations Fast Full Text

Alerting

Enhanced MDS

In-memory BI for corporate

Impact AnalysisSQL StudioReliable & Integrated Failover Detection

Multiple Readable Secondaries

Audit Enhancements

Paging for result sets

Column store DW

Win32 access to database files

HA for StreamInsight Full Globe

Spatial Support

DAC Enhancements

Sysprep for AS

Management Pack for High Availability

Backup Secondaries

ODBC for Linux

JDBC 4.0 driver

Support for ARM processors

SSMS Enhancements

FileTable

Default Schema for Windows Group

PowerPivot Enhancements

Windows Server Core Support Reporting as

SharePoint Shared Service

Infrastructure and server software in a single integrated solution

Existing Technologies

Failover Clustering

• Local server redundancy

Database Mirroring

• Primary disaster site for databases• Local server and storage redundancy

Log Shipping• Additional disaster sites for databases• App/user error recovery

Replication• Database reporting and read scale out

with redundancy

Always On Partner

Solutions• Highest hardware availability

Improve Failure Detection• Eliminate false failures

• Availability of necessary data for a non-repro root cause analysis of SQL failures

• Health check mechanism which accurately identifies all detectable SQL failures

Before SQL11

Machine 1

ResDLL SQL Server

SELECT @@ SERVERNAMELookAlive?IsAlive?

SQL Server

Is sqlservr.exe running?

Before SQL11• Too many false failovers• Server too busy to take new

connections• Query timeout couldn’t be

configured• Single query failure would cause

failover• Ping pong during heavy load

• No failover when SQL Server is hung• @@servername runs, everything

else is broken

How to fix it?

• Part 1: Create a mechanism to determine health state• sp_server_diagnostics• Resource dll must be architected to use new

model

• Part 2: allow user to configure what healthy means to them• New configuration options in the resource dll

sp_server_diagnostics

• Analyze internal system state• Reliable when nothing else is working• Report health state when nothing is working• Reporting health state for different components• Component name• Health state: Clean, Warning, Error, Not

determined• Data: Extra logging for troubleshooting

• Memory status• Wait stats, blocker report• XEvents ring buffer

Cluster resource dll

•Use result from SP to determine when to failover•Configure sensitivity level•Configurable health check timeout

Syntax

• Run in a loop, report health status every n seconds

• Run once and stop when interval = 0

sp_server_diagnostics @repeat_interval = [sec]

SQL11

Machine 1

ResDLL SQL Server

sp_server_diagnostics (background)

IsAlive/LooksAlive?

SQL Server

AlwaysOn

A

A

Shared Storage

A

Solution Options

Local Solution on Shared Storage

• Faster, more reliable failure detection• Automated failover of client connections• Support for stretch clusters• SQL Server instance failover

Local Solution on Non-Shared

Storage

• Automated failover of client connections• Both synchronous and asynchronous data movement• Multiple secondary failover targets can be maintained• Readable secondary failover targets• Failover multiple databases with dependent objects

like logins

Disaster Recovery Solution

• Asynchronous data movement• Manual failover with fast recovery• Multiple secondary failover targets can be maintained• Readable secondary failover targets• Failover multiple databases with dependent objects

like logins

High-Level Architecture

SQL Server Instance

SQL Server Instance

SQL Server Instance

Availability Group 1

Availability Group 2

Physical log based data transport

Synch or Asynch

17

Windows Server Failover Clustering

Key concepts for AlwaysOn

• Contained Database (CDB)• Database and additional objects associated

with that database:• Logins, Agent Jobs, etc

• Availability Group• Set of DBs or CDBs that you failover together• Defines Availability Replica locations and

settings• Availability Replica• Physical copy of the set of databases defined

for an Availability Group

Application behaviour in current database mirroring

Primary MirrorLog Records

SQL 2008 Database Mirroring

R/W workload Operational Reporting

Mirror Primary

Backup

New Solution: Readable Secondary

PrimaryReplica

SecondaryReplica

Log Records

Database Mirroring like functionality with AlwaysOn

R/W workloadOperational Reporting

SecondaryReplica

PrimaryReplica

Backup

Connecting to an AlwaysOn Availability Group

Subnet1

2. V

NN =

> VI

P1,V

IP2

HADR AG1

N1

N2

N3

1. L

ooku

p V

NN

3. Connect to VIP1

VIP1 bound to AG1

Primary on N1

DNSVIP2 brought online on N3 after failover

4. Connect to VIP2 (after

failover)

Subnet2

• Seamless and efficient failover

• Seamless connectivity even across sub-nets

Other new features

Windows Server Core

• Stripped down installation of Windows (no GUI)• 60%-70% less reboots due to less updates• All SQL Server SKUs supported but x64 only

FileTable• New type of table• Allows you to backup, restore, search, and update

Windows files from within SQL Server

TSQL support for window aggregation

• Applies the aggregation while you’re reading data • Enhances performance and flexibility

User-Defined Server Roles

• Allows for better compliance with more granular roles

Default Schema for Windows

Groups

• Increase manageability and decrease complexity• Manage sever access more effectively with

domain groups

Other new features

XE Profiler• New, ultra-low impact profiling tool built

on Extended Events

Distributed Replay

• Use multiple computers to replay a captured trace from multiple machines

• Helps to simulate a mission critical workload

SSIS is now a server

• Integrated with SQL Server • Avoids memory contention with SQL Server

Memory Manager changes

• CLR and MPAs now part of the buffer pool• Max Server Memory can be set higher• No AWE!

Q&A

© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.