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Database aspects

Saturday, 16 October 2010. Database triggers - as (almost) perfect decoupling facililty. While reading the Google's Percolator paper I have noticed that Percolator supports observers - the capability to run specific logic. When data in the particular column has changed. This reminded me of triggers. Usual database triggers. As a common knowledge - something bad to use. I will not list here the disadvantages of the triggers - they are well known. Lets look at the positive. Friday, 24 September 2010. I wou...

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Database aspects | dbaspects.blogspot.com Reviews

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Saturday, 16 October 2010. Database triggers - as (almost) perfect decoupling facililty. While reading the Google's Percolator paper I have noticed that Percolator supports observers - the capability to run specific logic. When data in the particular column has changed. This reminded me of triggers. Usual database triggers. As a common knowledge - something bad to use. I will not list here the disadvantages of the triggers - they are well known. Lets look at the positive. Friday, 24 September 2010. I wou...

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Database aspects | dbaspects.blogspot.com Reviews

https://dbaspects.blogspot.com

Saturday, 16 October 2010. Database triggers - as (almost) perfect decoupling facililty. While reading the Google's Percolator paper I have noticed that Percolator supports observers - the capability to run specific logic. When data in the particular column has changed. This reminded me of triggers. Usual database triggers. As a common knowledge - something bad to use. I will not list here the disadvantages of the triggers - they are well known. Lets look at the positive. Friday, 24 September 2010. I wou...

INTERNAL PAGES

dbaspects.blogspot.com

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Database aspects: TPCH on Postgresql

http://dbaspects.blogspot.com/2010/03/tpch-on-postgresql.html

Monday, 8 March 2010. This article intended for the people who are somewhat familiar with the TPCH and interested to find out what are obstacles for running it on Postgresql, and how to overcome them. As a part of my research for the Petascan, I study performance of the TPCH on Postgresql. Fortunately Postgresql has an option to disable nested loops completely. It can be done by executing the following command:. Enable nestloop = false. Q17 Original query is:. Sum(l extendedprice) / 7.0 as avg yearly.

2

Database aspects: November 2009

http://dbaspects.blogspot.com/2009_11_01_archive.html

Saturday, 7 November 2009. The look into RDBMS versus DHT (Distributed Hash Table). Nearly all of the modern web-based information systems are using data storage engines of some kind. Some are using RDBMS’es and others Distributed Hash Tables. However most of the biggest players on large scale markets are using DHT’s for their data storage requirement. Amazon uses Dynamo (http:/ www.allthingsdistributed.com/2007/10/amazons dynamo.html). Subscribe to: Posts (Atom). View my complete profile.

3

Database aspects: Relational vs non-Relational databases - paper review

http://dbaspects.blogspot.com/2010/02/relational-vs-non-relational-databases.html

Thursday, 4 February 2010. Relational vs non-Relational databases - paper review. I just finished reading of the very interesting paper “No Relation: The Mixed Blessings of Non-Relational Databases”. By Ian Thomas Varley which compares a relational and a non-relational databases. I enjoyed the reading very much. The author seems to be a bit biased towards non-relational databases, but this text still going to be very interesting to anyone exploring this new area in the database management.

4

Database aspects: The Memcache vs Datastore on google app engine

http://dbaspects.blogspot.com/2010/01/memcache-vs-datastore-on-google-app.html

Sunday, 24 January 2010. The Memcache vs Datastore on google app engine. I was curious to know - what are benefits of using GAE caching mechanism, how it compares to the datastore. We have performed several tests of certain (100 bytes) data value storing and retrieving by both mechanisms. The performance time of several tries has been averaged. Results of the first calls where dismissed since they represent application warm-up and not the speed of the services being tested. Access by the key. Memcache is...

5

Database aspects: Impressions from the development of the applications under Google App Engine

http://dbaspects.blogspot.com/2009/12/impressions-from-development-of.html

Tuesday, 22 December 2009. Impressions from the development of the applications under Google App Engine. Impressions from the development of the applications under Google App Engine are quite positive. It is finally java. The development on familiar j2ee platform is pleasant. It also gives the sense of freedom to move to other platform if needed. How to do analytics? How to make mailings to many users? How to perform heavy upgrade process? Subscribe to: Post Comments (Atom). A seasoned Software Architect...

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dbaspects.blogspot.com

Database aspects

Saturday, 16 October 2010. Database triggers - as (almost) perfect decoupling facililty. While reading the Google's Percolator paper I have noticed that Percolator supports observers - the capability to run specific logic. When data in the particular column has changed. This reminded me of triggers. Usual database triggers. As a common knowledge - something bad to use. I will not list here the disadvantages of the triggers - they are well known. Lets look at the positive. Friday, 24 September 2010. I wou...

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