Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Plain View
Hadoop >> mail # user >> HDFS Federation address performance issue


+
Anfernee Xu 2014-01-28, 18:04
+
Daryn Sharp 2014-01-28, 18:54
+
Anfernee Xu 2014-01-28, 19:10
Copy link to this message
-
Re: HDFS Federation address performance issue
Response inline...
On Tue, Jan 28, 2014 at 10:04 AM, Anfernee Xu <[EMAIL PROTECTED]> wrote:
Namenode commits multiple requests in a batch. In Namenode it self, the
lock for write operations make them sequential. But this is a short
duration lock and hence will make from the multiple clients perspective,
the creation of files as simultaneous.

If you are talking about a single client, with a single thread, then it
would be sequential.

Hope that makes sense.
http://hortonworks.com/download/

CONFIDENTIALITY NOTICE
NOTICE: This message is intended for the use of the individual or entity to
which it is addressed and may contain information that is confidential,
privileged and exempt from disclosure under applicable law. If the reader
of this message is not the intended recipient, you are hereby notified that
any printing, copying, dissemination, distribution, disclosure or
forwarding of this communication is strictly prohibited. If you have
received this communication in error, please contact the sender immediately
and delete it from your system. Thank You.