[Hadoop] apache commons configuration

Someone's discussed it, I'm against because (a) there's a lot of
historical configuration stuff in there, (b) ini files are less flexible
than XML, (c) neither of them are very dynamic. when the NN goes down
and you want the DNs to reconnect to a different host, how do you do
that when all data is read at start time?

Hi Folks

For those in the Austin, Texas area we'll be meeting again this Thursday
evening (8/26). Karmasphere and Pentaho will be presenting and I'll also
be giving a quick introduction to Hadoop for all the new attendees before
we begin.

Full details are available here -
http://austinhug.blogspot.com/2010/08/august-meeting-826.html

Regards
Steve Watt



From:
Steve Loughran <[email protected]>
To:
[email protected]
Date:
08/24/2010 05:25 AM
Subject:
Re: apache commons configuration


Someone's discussed it, I'm against because (a) there's a lot of
historical configuration stuff in there, (b) ini files are less flexible
than XML, (c) neither of them are very dynamic. when the NN goes down
and you want the DNs to reconnect to a different host, how do you do
that when all data is read at start time?

Hi Folks

15,000 people attended SXSW Interactive last year. As such, a couple of
folks from the Apache Hadoop and Cassandra community have joined up to put
together a "Big Data for everyone" panel at SXSW next year. The intent is
to proselytize both the Online and Offline Big Data stack (incl. HBase,
Pig, Hive, etc.) to the as yet uninformed. There are no agendas here other
than getting the word out and educating the audience.

Acceptance to SXSW is partially democratic and community votes for the
session greatly affect the outcome.

If you have a few minutes, please sign up and vote for our panel. We'd
really appreciate it. Voting closes on Friday.

http://panelpicker.sxsw.com/ideas/view/7475

Regards
Steve Watt

For some recent discussion, see
https://issues.apache.org/jira/browse/HADOOP-6910

Hi experts,

For hadoop 0.20.2, we have following task tracker configuration
<property>
<name>mapred.local.dir</name>
<value>/data/mapred/local</value>
</property>

It seems not what I expected -- the directory /tmp/hadoop-user/mapred/local
was used.

Any suggestion?

Thanks,
Bob

Config problems like this seem to usually be traced back to broken XML formatting prior to this entry or the property being in the wrong file (in this case, it should be in mapred-site.xml).