Re: Low-latency queries, HDFS exclusively or should I go, e.g.: MongoDB?

2015-01-21 Thread daemeon reiydelle
At the end of the day, the more data that is pulled from multiple physical nodes, the (relatively) slower your response time to respond to queries. Until you reach a point where that response time exceeds your business requirements, keep it simple. As volumes grow with distributed data sources to

Re: Launching Hadoop map reduce job from a servlet

2015-01-21 Thread Ravi Prakash
Hi Rab! I think you have a comma in between mapreduce and framework.name where it should be a period. You can also try looking at the job's logs to see if the configuration for mapreduce.framwork.name was indeed passed or not. HTH On Friday, January 16, 2015 9:55 AM, rab ra

Enable symlinks

2015-01-21 Thread Tang
hi, anyone know how to enable symlinks in HDFS? I call it FileSystem.enableSymlinks() in client side,and try to create a symlink, it throw following exceptions: org.apache.hadoop.ipc.RemoteException: Symlinks not supported         at

AW: multihoming cluster

2015-01-21 Thread Thon, Ingo
Hi, which one is the slave configuration file? You mean /etc/hadoop/conf/slaves? This one contains the hostnames. I also checked the configuration option you pointed to in your previous emails links. Everything is set there accordingly. Ingo Von: Arpit Agarwal [mailto:aagar...@hortonworks.com]