When writing papers Latex is the most common tool. Usually it’s very hard to use, but with Lyx a graphical interface it’s pretty easy. Nevertheless there are some things to keep in mind especially when you work with images. If … Continue reading
As part of my master thesis I am evaluating the performance of Hive queries that use tables stored in HBase. Although the HBase table mappings in Hive are very experimental and features like server side filtering and partitions have still … Continue reading
When creating a column mapping in hive all the data is being saved to the metastore. Example of a hive hbase column mapping: CREATE EXTERNAL TABLE hivetableName(Col String, Col1 String) STORED BY ‘org.apache.hadoop.hive.hbase.HBaseStorageHandler’ WITH SERDEPROPERTIES (“hbase.columns.mapping” = “colFamily:Col, colFamily:Col”) TBLPROPERTIES(“hbase.table.name” … Continue reading
When resizing a VirtualBox image you may face the error “Resize hard disk operation for this format is not implemented yet!”. You can fix this by doing a convert to the VDI disk format before trying to resize it. It … Continue reading
Started working on my master thesis with the title: Analysis of migrating a MySQL based data warehouse and monitoring system to hadoop Most relevant books and papers: Hadoop The Definitive Guide 2nd Edition and HBase The Definitive Guide Hive – … Continue reading