Tracking document versions with MongoDB
Consider requirement that we have to be able to recreate/query any version of a document that ever existed in a particular collection. So we start out with: { docId: “A”, version: 1, color: “red”, locale: “USA” } If we need…
findAndModify()
Quick question – on findAndModify() concurrency. Ex: 2 threads are trying to pull the same document at the same time (using status=pending), and assuming 1st thread gets the lock on the doc and change the status to “in-process” through findAndModify()….
Working with MongoDB Indexes
Indexes are the single biggest tunable performance factor in MongoDB Absent or suboptimal indexes are the most common avoidable MongoDB performance problem. // Create an index if one does not exist db.recipes.ensureIndex ( { main_ingredient : 1 } ) //…
TokuDB with MariaDB ?
https://mariadb.com/kb/en/mariadb/tokudb/ https://mariadb.com/kb/en/mariadb/enabling-tokudb/ https://mariadb.com/kb/en/mariadb/tokudb-differences/ http://www.chriscalender.com/enabling-tokudb-in-mariadb-is-a-breeze/ https://mariadb.com/kb/en/mariadb/tokudb-system-variables/
MongoDB setOnInsert
If an update operation with upsert: true results in an insert of a document, then $setOnInsert assigns the specified values to the fields in the document. If the update operation does not result in an insert, $setOnInsert does nothing….
Redis vs NCache – A Detailed Feature Comparison
A nice comaparision of Redis vs NCache at Alachisoft This comparison is between Redis v3.0.7 and NCache 4.6. It is a detailed feature by feature comparison of both products so you can quickly see which product is weak or strong…
How to use Big Data to get a 360 view of your customers
BigData has changed a lot of things, and how people shop is one of the bigger ones. Now, customers are used to seeing personalized recommendations for products, customized event ads, and an entire bevy of buyable goods and services curated just…
Couchbase 102: Couchbase Server & Couchbase Mobile Use Cases on May 5, 2016 11:00 AM SGT
You can register for Couchbase 102: Couchbase Server & Couchbase Mobile Use Cases on May 5, 2016 11:00 AM SGT at: https://attendee.gotowebinar.com/register/2826576488407161092 Learn about the most common use cases of Couchbase Server & Couchbase Mobile and how Couchbase meets…
MariaDB Enterprise Installation
Installing MariaDB Enterprise Windows Packages 1. Login to http://mariadb.com and click on the My Portal link then on Downloads 2. In the Enterprise Products section, use the menus to select the version of MariaDB Enterprise you are interested in and…
Don’t miss Back to Basics Webinar 1: Introduction to NoSQL
Webinar – Back to Basics Webinar 1: Introduction to NoSQL Don’t miss Back to Basics Webinar 1: Introduction to NoSQL Hello, Don’t forget to register for the first webinar in our Back to Basics series. Join us a…