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SSIS, Tempdb Database, and SQL Server Log Files
The tempdb system database is a global resource that is available to all users connected to the instance of SQL Server. Tempdb is re-created every time SQL Server is started, which means the system...
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Drop failed for DatabaseRole : The database principal owns a schema in the...
This error is raised when there is a schema owned by the role you are trying to drop. The most straight forward and quick fix for this error is to revert the schema ownership to the appropriate role in...
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SQL Server 2014 and SSDT (AKA BIDS)
Hey folks. This is going to be a short post, just wanted to mention something that may come handy for those who are interested in play with SQL Server 2014. I downloaded SQL Server 2014 a couple of...
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An alternative for Index with Include: CLUSTERED (UNIQUE) Index
Indexes are good and helpful for reading from the tables and one can add different indexes based on any kind of queries that are going to be issued against the tables and make sure they always hit...
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OBIEE: Multiple joins between same tables (Fact to Dim)
Hi all. I am finally writing a new post after more than 1 year and surprisingly it is not on SQL Server! I must confess that I am not a front-end kinda person and do not particularly enjoy doing...
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OBIEE RPD Design: Convert Snowflake to Star schema from multiple sources in...
As I play more with OBIEE, I learn more about what it is capable of and where its main power resides. OBIEE has 3 layers: Physical, Business Model and Mapping, and Presentation. The middle layer, BMM,...
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How to import org.apache.spark.sql.SQLContext.implicits in Spark : error...
I am doing a mini project for my company using Spark/Scala and have been stuck with the error mentioned in the title for a couple of days. Googling that error suggested to import...
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Hadoop Error org.apache.hadoop.hdfs.BlockMissingException: Could not obtain...
Like almost all Mondays, today was a very challenging one. The first thing I noticed was that our primary namenode had faced some issues over the weekend and went down. Which means secondary namenode,...
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Hive Performance Tuning
If you have been working in Big Data, you have definitely heard of Hive. Apache Hive is the data warehouse infrastructure build on top of Hadoop. I did a presentation on how to best use Apache Hive and...
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YARN Capacity Scheduler: Queue Priority
Capacity Scheduler is designed to run Hadoop jobs in a shared, multi-tenant cluster in a friendly manner. Its main strength is that it guarantees specific capacity for a certain group of users by...
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