Saturday, 22 November 2014

Inline Prompts in OBIEE 11g


A prompt that is created at the OBIEE analysis level is called an inline prompt. This is referred as inline prompt because the prompt is embedded in the analysis and is not stored in the Oracle BI Presentation Catalog. That means the prompt is created for that particular analysis and therefore cannot be added to other analyses.

Monday, 27 October 2014

Apache AVRO - Data Serialization Framework

AVRO is an Apache open source project for data serialization and data exchange services for Hadoop .Using Avro (which functions similar to systems such as Apache Thrift, Protocol Buffers- Google's) data can be exchanged between programs written in any language. Avro is gaining new users compared to other popular serialization frameworks, for the reason that many Hadoop based tools support Avro for serialization and De-serialization.


Before we get into the features lets understand about Serialization & De-serialization.
Serialization means turning the structured objects into a bytes stream for transmission over the network or for writing to persistent storage.
De-serialization is the opposite of serialization, where we read the bytes stream or stored persistent storage and turns them into structured objects.
The serialized data which is in a binary format is accompanied with schemas allowing any application to de serialize the data.

Some Features Of Avro
  • Avro serialized data doesn't require proxy objects or code generation (unless desired for statically-typed languages). Avro uses definitions at runtime during data exchange. It always stores data structure definitions with the data making it easier to process rather than going for code generation.
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