Does anyone know if there is a setting for o_direct for drives in Hadoop 1.2.1 or hadoop 2.7, specifically for hadoop 1.2.1. I need it for hadoop 1.2.1 to use the kernel´s "O_DIRECT" flag.
Any information would be great.
I found it in the xml to utilize the 0_direct kernel flag which you need to enable in the kernel from 3.x and up with.
Related
I experienced with Nutch/MongoDB setup. But I cannot find instructions for Nutch 2.3.1 (Hadoop 2.5.2 data structure) configuration on Linux VM. Hadoop has been installed successfully. Please assist me.
Can I avoid Hbase installation for Nutch_2.3.1/Hadoop_2.5.2 configuration?
Regards,
Victor
I am confused which hbase version to used with hadoop- 2.7.1 or hadoop 2.6.0?
HBase V1.2.x is now supporting Hadoop 2.7.1+ version.
I found this link, there is a chart of Hadoop and HBase compatibility.
Have a look of it.
https://www.quora.com/Which-version-of-hbase-should-I-use-with-Hadoop-2-7-1
I have Hadoop 2.5.1 installed on three nodes (1 master, 2 slave nodes) and I want to know the version compatibility of HBase and Hive?
Also, are any alternatives for this Hadoop+Hbase+Hive integration or any guides explaining the installation of Hadoop 2.5.1 with compatible HBase and Hive ?
Currently I am trying with Apache Ambari for the above integration and its still ongoing.
Environment:
Jdk version: 1.7.0_67
RHEL 5
64 bit architecture
Any leads will be much appreciated!
With hadoop 2.5.1 supported versions are:
HBase-0.98.x (Support for Hadoop 1.1+ is deprecated.)
HBase-1.0.x (Hadoop 1.x is NOT supported)
HBase-1.1.x
HBase-1.2.x
Here is the link : http://hbase.apache.org/book.html#configuration
Warning: only hive 1.2.1 can work with Hbase 2.x.
I have no other option than to install HBase 0.90.6 as it is only recommended stable version for Nutch (web crawler) other than 0.90.4.
My question, which Hadoop version is recommended for HBase 0.90.6 to work on pseudo distributed mode?
I figured out Hadoop 0.20.205.0 is the compatible version.
I tried Hadoop 1.2.1 but it doesn't seem to work well with HBase 0.90.6
I have a Hadoop cluster with version 1.2.1 and recently i also downloaded hbase 0.94.11 to try out. I able to setup hbase t run in distributed mode but when i checked the web gui status, it stated that the Hadoop version is 1.0.4. I noticed that this is because hbase use the hadoop-core-1.0.4.jar file comes together with hbase. So my question is should i replace this jar file with the hadoop-core-1.2.1.jar so that hbase can use the latest hadoop-core jar file? And does it matter?
Cw
You don't have to do that if 1.0.4 works for you. Because the newest version may bring you any other problems and just replace hadoop-core.jar is unsafe. If you want to upgrade the HBase, please follow the official guide.
Hope it helps.