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Passionately curious about Data, Databases and Systems Complexity. Data is ubiquitous, the database universe is dichotomous (structured and unstructured), expanding and complex. Find my Database Research at SQLToolkit.co.uk

"The important thing is not to stop questioning. Curiosity has its own reason for existing" Einstein



Tuesday, 22 July 2014

SQLBits XII

SQLBits XII held at The International Centre, Telford between 17-19 July was an event that made history and will be the talk of the town for years to come. A big thank you needs to go the committee, speakers, delegates, sponsors and helpers.This is the forth year I have helped a SQLBits and it is always such a privilege to help at the event.

The session content stretched the breath and depth of the SQL Server platform from Big Data Analytics, Business Intelligence, Development and Administration. 

I spent the training day at the Real World Big Data-Deploy, Design and Manage like a Pro session with Adam Jorgensen and John Welch. The session linked Hadoop to BI solutions providing examples in labs culminating in streaming real time analytics. It was packed full of tips on best practices, configuration patterns, predictive analytics for the analysts and BI integration for the data developers. These new technologies allow you to modernize your data architecture. This was a great practical session. 

The keynote was delivered by Nigel Ellis a Distinguished Engineer in the Database Systems Group at Microsoft. It continued along the track of previous technical keynotes starting with an overview of Azure SQL Database progressing to the technicalities of ring geometry of distributed computing.
 
Greatly enjoyed the session on Latches, Spinlocks, and Lock Free Data Structures. It is always fun to delve into this area using sys.dm_os_latch_stats which returns information about all latch waits organized by class.

Microsoft gave a session on In-memory tables which introduced  the in-memory technology for optimizing OLTP workloads and gave some key pointers to consider when designing new architectures. There are currently some scope limitations. The document Common Workload Patterns and Migration Considerations is a good source of reference.

There were many, many more sessions delivered by excellent speakers and it is never possible to attend them all.  It is good to know the sessions are recorded and will be avaialble later on the SQLBits website.


A few mentioned a useful paper to read by Joseph Sack on the new SQL Server 2014 Cardinality Estimator.The article is entitled Optimizing Your Query Plans with the SQL Server 2014 Cardinality Estimator . This is an important new feature that can make existing plans perform the same, better or worse so it is key to test these changes out. You can use trace flag 2312 and 9481 to test code using the different optimisers. The article Enable plan-affecting SQL Server query optimizer behaviour that can be controlled by different trace flags on a specific-query level describes the flags.
 


  

Tuesday, 15 July 2014

Pre-SQLBits - Bristol SQL Server User Group - July Meeting


Monday 14 July saw the Bristol User Group meet with Brent Ozar talking on Are AlwaysOn Availability Groups Right for You? It was amazing that Brent came to share his in depth knowledge on AlwaysOn. He shared the pros and cons of what needs to be considered when creating this type of database architecture solution.

Brent has an amazing set of resources covering AlwaysOn. These are  found
http://www.brentozar.com/sql/sql-server-alwayson-availability-groups/ 

The Microsoft guides I found useful were:-

AlwaysOn Architecture Guide: Building a High Availability and Disaster Recovery Solution by Using AlwaysOn Availability Groups
http://msdn.microsoft.com/en-us/library/jj191711.aspx

Microsoft SQL Server AlwaysOn Solutions Guide for High Availability and Disaster Recovery
http://msdn.microsoft.com/en-us/library/ff929171.aspx

Comparison of Failover Cluster Instances and Availability Groups
The core concepts between FCIs and Availability Groups are compared in this table taken from http://msdn.microsoft.com/en-us/library/ff929171.aspx
 

For more details and caveats see the full article http://msdn.microsoft.com/en-us/library/ff929171.aspx

Thursday, 3 July 2014

Mainstream Support Ends


Mainstream Support for SQL Server 2008 and SQL Server 2008 R2 will end on  8 July 2014.  The definition of Mainstream support is shown in this table. 


Taken from http://support.microsoft.com/lifecycle


Monday, 23 June 2014

SQL Server User Group Bristol July Meeting



The next SQL Server User Group meeting in Bristol is a Pre SQLBits meeting on 14 July 2014 with Brent Ozar. 

Location:
Opus Recruitment Solutions
Lower Castle Street
Bristol
BS1 3AG

The session is entitled:  Are AlwaysOn Availability Groups Right for You?  

The session abstract is:
SQL Server 2012's hottest new feature combined the best of clustering, mirroring, and replication to give you high availability plus scale-out reads. Does it make sense for your database server?  Brent Ozar has deployed AlwaysOn AGs in high-profile setups like StackOverflow.com, AllRecipes.com, and Discovery Education. This session is for DBAs who are considering implementing AlwaysOn AGs, or who are wondering why their AlwaysOn setup is only OftenOn.

To register: http://bit.ly/1nCye6B