I/O! I/O! It’s off to disk we go...
You’ve issued your select query – the data isn’t in memory and so you’ve got to go to disk to get it. There are no dwarves to help you so the question is - How is this satisfied? What exactly is read-ahead? Does the edition you have installed affect how this is performed? Does partitioning alter anything? That’s just the half of it – there’s writes to talk about too. Understand the fundamentals of SQL Server I/O in this one hour practical session.
James Rowland-Jones is a Principal Program Manager for Microsoft. He is passionate about delivering highly scalable solutions that are creative, simple and elegant in their design. James specializes in big data warehouse solutions such as Microsoft Analytics Platform System (APS), Azure SQL Data Warehouse. Hadoop ecosystems.
James is a keen advocate for the SQL Server community; both internationally and in the UK. He has previously served on the Board of Directors for PASS and helped organise SQLBits. James was awarded Microsoft’s MVP accreditation from 2008 - 2015 for his services to the community.
You can find James on twitter @jrowlandjones
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