Doug Cutting a écrit : > Thomas Friol wrote: >> Other question, : Why the 'hadoop.tmp.dir' is user.name dependant ? > > We need a directory that a user can write and also not to interfere > with other users. If we didn't include the username, then different > users would share the same tmp directory. This can cause > authorization problems, if folks' default umask doesn't permit write > by others. It can also result in folks stomping on each other, when > they're, e.g., playing with HDFS and re-format their filesystem. > > We should better document configuring things for fully distributed > operation. In particular, we should probably recommend setting > mapred.system.dir in the "Fully Distributed Operation" section of: > > http://lucene.apache.org/hadoop/api/overview-summary.html#overview_description > > > The wiki should also probably describe this better. > > Could you file a documentation bug? Thanks! Sure : https://issues.apache.org/jira/browse/HADOOP-1786
Thomas > > Doug -- Thomas FRIOL Joost ANYWARE TECHNOLOGIES Tél : +33 (0)561 000 653 Portable : +33 (0)609 704 810 Fax : +33 (0)561 005 146 www.anyware-tech.com
