2018-11-30
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2018-11-30
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2018-06-13
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2018-03-19
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2016-01-22
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2015-12-21
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2015-09-18
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2 years ago I posted “16 papers and original articles on Big Data” It’s now time to review and extend my original list. “Big Data” reached its Peak in...
2013-06-01
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The Big Data revolution will be more important than the PC or the Internet. While there were many interesting conversations last week at Strata, two new publications captured my...
2013-03-04
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2011-06-01
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What are the most influential papers in the world of Big Data? Let me suggest: http://bit.ly/BigData1 We face a data management problem: IDC 2010 Digital Unverse Study http://bit.ly/BigData2...
2011-05-30
13 reads
I recently had to copy an Azure SQL database (SQL db) from one subscription...
Ivan Jelić, Group CEO at Joyful Craftsmen, reflects on what separates AI success from...
By Chris Yates
AI is no longer a niche capability – it is a leadership catalyst. As...
Comments posted to this topic are about the item How a Legacy Logic Choked...
Comments posted to this topic are about the item SQL Server Columnstore Index Fragmentation
Hi i was surprised to see the approach my coworkers used to sunset talend...
The columnstore index is absolutely different than the traditional rowstore b-tree index. Because of this, it doesn't suffer from the same kind of fragmentation across pages as the b-tree index. Yet, it does suffer from a type of fragmentation brought about by an excess of deleted rows in a rowgroup and a lack of compression of storage because more things are in the delta store. While b-tree indexes use dm_db_index_physical_stats to show fragmentation, which system tables or DMVs can be used in SQL Server (prior to SQL Server 2025) to determine columnstore fragmentation?
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