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May/13

30

FileDescriptors and HBase

Though HBase works on HDFS, when it comes to need of open file handles, it comes close to any regular database and needs a lot of file descriptors open. 

Linux by default limit the number of file descriptors to 1024. You can check it by issuing

$ ulimit -n

1024


To change this limit, open limits.conf as root

$ sudo vi /etc/security/limits.conf

hduser soft nofile 10240

hduser hard nofile 10240

 In this setting I have increased no of file descriptors 10 times. 

 

 

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