Do you have below warnings issue for every command with your Hadoop set-up ? Warning: $HADOOP_HOME is deprecated. [root@hostname logs]# hadoop dfs -ls / Warning: $HADOOP_HOME is deprecated. Found 3 items drwxr-xr-x – root supergroup 0 2014-07-09 09:06 /hadoop drwxr-xr-x…
From our internal testing we did see some performance boost when NUMA was disabled using -> numactl –interleave=all ….. Below are the details from MongoDB http://docs.mongodb.org/manual/administration/production-notes/ Running MongoDB on a system with Non-Uniform Access Memory (NUMA) can cause a number…
MongoDB Do you want to work at MongoDB, Inc. and be part of a revolution in database software? Check out our open positions buff.ly/1owu5RP Development Should Be Simple and Beautiful buff.ly MongoDB would not be the leading NoSQL database without…
sed (stream editor) is a Unix utility that parses and transforms text, using a simple, compact programming language. sed was based on the scripting features of the interactive editor ed (“editor”, 1971) and the earlier qed (“quick editor”, 1965–66). sed…
RDBMS – MongoDB ETL Demo http://jsonstudio.com/rdbms-mongodb-etl-demo/ SQL access to MongoDB using SonarSQL Demo http://jsonstudio.com/sql-access-mongodb/
This discussion is a starting point for providing the inital platform for knowledge sharing & discussion of various aspects regarding newly introduced MS SQL Server 2012/2014 Columnstore Indexes . Overview: A Columnstore index can be defined as a technology for…
Considering Oracle’s increase in their Li sense cost – the Open source databases like PostgreSQL & MariaDB can be partially replace Oracle in your some of your Applications/Projects. Please check the below comparison in their features. We observed they both are good…
Yahoo! Cloud System Benchmark (YCSB) for Oracle DB :- Sample Reports Description W/T – secs Threads# 10 Threads# 25 Threads# 30 Threads# 50 Update heavy workload (50%R : 50% W) Workload# a 1777…
# mysql -u root -h 127.0.0.1 Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.5.8 MemSQL source distribution (compatible; MySQL Enterprise & MySQL Commercial) Copyright (c) 2000, 2011, Oracle…
The following table presents the various SQL terminology and concepts and the corresponding MongoDB terminology and concepts. SQL Terms/Concepts MongoDB Terms/Concepts database database table collection row document or BSON document column field index index table joins embedded documents and linking…