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Are INSERTs serialized because of row group locks? No. If a trickle INSERT requires an OPEN row group and it cannot place a lock on it it will create a new one. any number of INSERT statements can proceed in parallel, each locking its own row group. While Read More...
The updateable clustered columnstore indexes introduced with SQL Server 2014 rely on a background task called the Tuple Mover to periodically compress deltastores into the more efficient columnar format. Deltastores store data in the traditional row-mode Read More...
Now that the TechEd 2013 presentations are up online on Channel9 you can check out Brian Mitchell’s session What’s New for Columnstore Indexes and Batch Mode Processing. Brian does a great job at presenting the new updatable clustered columnstore Read More...
Columnar storage has established itself as the de-facto option for Business Intelligence (BI) storage. The traditional row-oriented storage of RDBMS was designed for fast single-row oriented OLTP workloads and it has problems handling the large volume Read More...
In my previous article How to use columnstore indexes in SQL Server we’ve seen how to create a columnstore index on a table and how certain queries can significantly reduce the IO needed and thus increase in performance by leveraging this new feature. Read More...
Column oriented storage is the data storage of choice for data warehouse and business analysis applications. Column oriented storage allows for a high data compression rate and as such it can increase processing speed primarily by reducing the IO needs. Read More...