Eclipse Community Forums
Forum Search:

Search      Help    Register    Login    Home
Home » Eclipse Projects » BIRT » Yellowfin releases fact sheet on In-memory analysis(In-Memory Analysis)
Yellowfin releases fact sheet on In-memory analysis [message #558522] Mon, 13 September 2010 11:10
Mark  is currently offline Mark Friend
Messages: 2
Registered: September 2010
Junior Member
Direct Link



1. Column-oriented systems are more efficient when an aggregate needs to be computed over many rows but only for a notably smaller subset of all columns of data, because reading that smaller subset of data can be faster than reading all data.

2. Column-oriented systems are more efficient when new values of a column are supplied for all rows at once, because that column data can be written efficiently and replace old column data without touching any other columns for the rows.

3. Data compression - Column data is of uniform type; therefore, there are some opportunities for storage size optimizations available in column-oriented data that are not available in row oriented data.

Yellowfin (Powered by Java, BIRT, Spring, JFreeChart)

Previous Topic:Optional Y Series Grouping
Next Topic:Where can i find the Birt 2.5.2 report engine api documentation?
Goto Forum:

Current Time: Fri Mar 31 00:46:06 GMT 2017

Powered by FUDForum. Page generated in 0.04024 seconds
.:: Contact :: Home ::.

Powered by: FUDforum 3.0.2.
Copyright ©2001-2010 FUDforum Bulletin Board Software