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Questions tagged [mapr]

MapR is a commercial data platform that offers a HDFS compatible distributed file system, a database that allows to store data in BigTable or JSON and a streaming platform for messaging. MapR leverages APIs from open source tools such as Hadoop, Kafka, HBase and provides a proprietary implementation written in C optimised for improved performance.

MapR is a complete enterprise-grade distribution for Apache Hadoop. The MapR Converged Data Platform has been engineered to improve Hadoop’s reliability, performance, and ease of use.

The MapR distribution provides a full Hadoop stack that includes the MapR File System (MapR-FS), the MapR-DB NoSQL database management system, MapR Streams, the MapR Control System (MCS) user interface, and a full family of Hadoop ecosystem projects. You can use MapR with Apache Hadoop, HDFS, and MapReduce APIs.

MapR supports the Hadoop 2.x architecture and YARN (Yet Another Resource Negotiator). Hadoop 2.x and YARN make up a resource management and scheduling framework that distributes resource management and job management duties.

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There are three MapR editions.

  • MapR Community Edition (formerly M3)
    • Free community edition.
  • MapR Enterprise Edition (formerly M5)
    • Adds high availability and data protection, including multi-node NFS.
  • MapR Enterprise Database Edition (formerly M7)
    • Adds structured table data natively in the storage layer and provides a flexible NoSQL database.

MapR can be installed on many versions of Red Hat Enterprise linux, CentOS, Ubuntu, Oracle Linux, and SUSE. A full matrix of supported Linux operating systems can be found here.

To install MapR the following requirements are needed.

  • A 64-bit CPU.
  • One of the above mentioned operating systems. (Red Hat Enterprise linux, CentOS, Ubuntu, Oracle Linux, or SUSE)
  • A minimum of 8GB of RAM.
  • At least one single unformatted disk.
  • A Resolvable hostname.
  • A common user on each server you wish to install MapR on.
  • Java 1.7.0 or higher.
  • Other
    • NTP, Syslog, PAM



Try MapR

Download the MapR Sandbox for VMware or Virtualbox for free.

OR

Install MapR on your own. Check to see if the installer is supported for your OS

You will have to meet the prerequisites for a successful installation

Get the mapr-setup sctipt from the MapR repository.

wget http://package.mapr.com/releases/installer/mapr-setup.sh

Run the mapr-setup script to start the installation.

bash ./mapr-setup.sh -y

Open the web UI with the following URL

https://<Installer node hostname/IPaddress>:9443

Following the prompts and you will be on your way to installing MapR.

There is also manual installation available. Full instructions can be viewed here.

Extensive documentation can be found on MapR's documentation site. http://maprdocs.mapr.com/home/



The Stackoverflow tag [mapr] can be used for questions about issues you have with the MapR platform.

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Cannot connect Mapr-tables on Mapr-FS?

Hj all, I'm use Mapr M7 Edition on Centos 6.4, 64bit. I'm test MapR-tables on MapR but click MapR-tables --> Error Home directory (/user/root) is missing for this user. Please create it in order to cache the recent tables administered by this…
Tân To
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Sqoop merge fails when column contains new line character

Ran Sqoop with options: --fields-terminated-by '\001' --optionally-enclosed-by '\003' Ran it twice to create 2 directories. This created a QueryResult.java with following line: private final DelimiterSet __inputDelimiters = new…
DilTeam
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starting warden after zookeeper of MapR

I am installing the MapR and I stucked at starting warden after start zookeeper on a single node. # service mapr-warden start Error: warden can not be started. See /opt/mapr/logs/warden.log for details On this file there is no detail. Does anybody…
Felipe
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Hadoop one machine only run one task

I am currently developing a hadoop program. The program is killed by Hadoop because the mapper tasker takes up high memory (around 7G). Is there a way to let one machine run only one task at a time? I tried settings shown below but it didn't work.…
Yukun
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Cannot instantiate single ton class in reducer in mapreduce hadoop?

I call a method of singleton class in reducer. So I create a instance of the class. Tt works for one key and for the rest of the keys it says that it cannot instantiate the class[ "java.lang.exceptio"].
udag
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Is it possible to combine mapR to pure apache hadoop?

I'm newbie on hadoop. I heard that mapR is better way to mount hadoop HDFS rather than fuse. But most of the related article just describe about mapR hadoop not pure apache hadoop. Anyone has experience of mounting pure apache hadoop with…
bosory
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java.io.IOException: No FileSystem for scheme: maprfs

I am trying to execute/run a web app(using Spring tool suite), through which one can submit jobs to hadoop. i am using apache-tomcat-6.0.36 server and mapr client for the same. However, when i run my app, i get the following…
Eashwar
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Large Number of Small Files in mapr

Hi Does MapR support large number(4 Million) of small files (Each 20KB) How well can it manage metadata of these files? If I want to run a mapreduce which parses each of these files, what performance can I expect out of a 5 node (Each node : 32GB…
Sebin John
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Problems in creating volume in mapr hadoop

I want to create a volume(MyVolume) but it can not mount the volume. it says this error: Failed to mount volume MyVolume, Permission denied its permission is root and admin.how can i create volume that comes to folder my cluster? thanks
csperson
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MapR on Ubuntu 12.0.4 - Disk setup on EC2

I see these steps in seting up the disk for MapR installation at link To determine if a disk or partition is ready for use by MapR: Run the command sudo lsof to determine whether any processes are already using the disk or partition. There should…
Manikandan Kannan
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what is the easiest way to get started with hadoop on ec2 preferably mapr

I want to get a small working mapr hadoop instance up on ec2 so i can play around with it and begin to learn more about it. How would I proceed? The mapr site (1) mentions starting with vmplayer (2). So, does one install vmplayer on an ec2 AMI and…
molicule
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while running hadoop fs -ls getting error no cldb entries

while running hadoop fs -ls getting error, please see below screenshot.
sandeep rathore
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mapr: Install mapr-zookeeper-5.0.0 manually

I want to install mapr-zookeeper-5.0.0.32987 through commandline manually, but when i provide version to yum install mapr-zookeeper-5.0.0.32987, it's giving me No package available error. How to install mapr-zookeeper-5.0.0 since i can't use "yum…
Swarnim Kumar
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MapR - Rest API list command is not giving proper output

MapR REST API for MapR DB looks like not working correctly. I simply tried list command for column family as filter but it is not giving me proper output but it is perfectly working with maprcli option.Here is a list of operation that i did. With…
Shashi
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Physical data location of MapR DB table

I created a table in MapR DB and loaded some raw data into it using hbase shell. Where can i find this data on MapR file system ? like hive data is stored in warehouse directory similarly how does MapR DB works? Or is there any other concept behind…
Shashi
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