November 2008
Intermediate to advanced
910 pages
27h 16m
English
book
Professional Microsoft® SQL Server® 2008 Administration
by Brian Knight, Ketan Patel, Wayne Snyder, Ross LoForte, Steven Wort
Content preview from Professional Microsoft® SQL Server® 2008 Administration
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
7.5. Management of Analysis Services Storage
One of the main reasons for using Analysis Services centers on performance with complex data retrieval. The design of the storage within Analysis Services, therefore, becomes very important when trying to achieve the query and processing performance expected. In order to understand storage design, this section first describes what modes of storage are available within Analysis Services. Next, you will look at the configuration of partitions. Last, you will learn how to design aggregations.
7.5.1. Storage Modes
Analysis Services permits configuring dimensions and measure groups using the following storage modes: Multidimensional OLAP (MOLAP), Relational OLAP (ROLAP), and Hybrid OLAP (HOLAP):
Multidimensional OLAP: MOLAP storage mode is the most aggressive because it stores all the aggregations and a copy of the source data with the structure. Additionally, the structure stores the metadata required to understand the structure. The real benefit of this structure is query performance, as all information needed to respond to queries is available without having to access the source data. Periodic processing is required to update the data stored within the structure, and this processing can be either incremental or full. As a result, data latency is introduced with this storage mode. Also as a result of this structure, storage requirements become much more important due to the volume of information that the system requires.
Relational OLAP ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.