What is RC local in Linux?
The script /etc/rc.
local is for use by the system administrator.
It is traditionally executed after all the normal system services are started, at the end of the process of switching to a multiuser runlevel.
You might use it to start a custom service, for example a server that’s installed in /usr/local..
What is RC in shell script?
Rc is the Plan 9 shell. It executes command lines read from a terminal or a file or, with the −c flag, from rc’s argument list. Command Lines. A command line is a sequence of commands, separated by ampersands or semicolons (& or ;), terminated by a newline. The commands are executed in sequence from left to right.
What is an RC file?
Developer file used by software development applications such as Visual Studio and Borland C++; saved in a plain text format and includes references to resources, such as user interface components, images, or icon files; used for compiling the resources into .
What is RC link?
RC LINK is our online alumni community. With RC LINK, you gain access to a global network of over 7,000 of your fellow graduates, as well as mentorship opportunities, exclusive job postings, internships, and more.
What is a orc file?
ORC File Format. … The Optimized Row Columnar (ORC) file format provides a highly efficient way to store Hive data. It was designed to overcome limitations of the other Hive file formats. Using ORC files improves performance when Hive is reading, writing, and processing data.
Why orc file format is faster?
ORC stands for Optimized Row Columnar which means it can store data in an optimized way than the other file formats. ORC reduces the size of the original data up to 75%. As a result the speed of data processing also increases and shows better performance than Text, Sequence and RC file formats.
Why is it called Bashrc?
3 Answers. It stands for “run commands”. This comes from MIT’s CTSS (Compatible Time-Sharing System) and Multics, where the idea that a command processing shell would be an ordinary program originated.
What is sequence file format?
A SequenceFile is a flat, binary file type that serves as a container for data to be used in Apache Hadoop distributed computing projects. SequenceFiles are used extensively with MapReduce. … When both are compressed, the file keys and values are collected into blocks and separately compressed.
What is RC and orc file format?
ORC File Format Full Form is Optimized Row Columnar File Format.ORC File format provides very efficient way to store relational data then RC file,By using ORC File format we can reduce the size of original data up to 75%.Comparing to Text,Sequence,Rc file formats ORC is better. Column stored separately.
What is columnar file format?
RCFile (Record Columnar File) is a data placement structure that determines how to store relational tables on computer clusters. It is designed for systems using the MapReduce framework. The RCFile structure includes a data storage format, data compression approach, and optimization techniques for data reading.
What is rc in Unix?
In the context of Unix-like systems, the term rc stands for the phrase “run commands”. It is used for any file that contains startup information for a command. … While not historically precise, rc may also be expanded as “run control”, because an rc file controls how a program runs.
Is ORC a columnar?
ORC is a row columnar data format highly optimized for reading, writing, and processing data in Hive and it was created by Hortonworks in 2013 as part of the Stinger initiative to speed up Hive.