Hi, Jeff. Thanks for your reply.
Is there a way to achieve this apart from using Zookeeper ?
 
 
MOHAMMED IRFANULLA S
HUAWEI TECHNOLOGIES CO.,LTD. huawei_logo


Address: Huawei Industrial Base
Bantian Longgang
Shenzhen 518129, P.R.China
www.huawei.com
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From: Jeff Zhang [mailto:zjffdu@gmail.com]
Sent: Monday, January 25, 2010 1:06 PM
To: hdfs-user@hadoop.apache.org; m.irfanulla@huawei.com
Subject: Re: HDFS File read issue

Maybe you can use zookeeper to achieve this


On Mon, Jan 25, 2010 at 3:20 PM, MOHAMMED IRFANULLA S <m.irfanulla@huawei.com> wrote:
Hi,
 
I'm using hadoop 0.20.1.
I would appreciate any help on the following issue in HDFS.
 
User1 has created a file file1.txt and started writing to this file(Writer thread).
User2 and user3 try to read from this file. But cannot read anything until atleast one of the blocks is complete. and they cannot read any block under development. (Reader threads)
 
Is it possible to block/prevent user2 and User3 from reading the file1.txt completely until the Writer thread calls close().
If possible, how to achieve it ?

MOHAMMED IRFANULLA S
HUAWEI TECHNOLOGIES CO.,LTD. huawei_logo


Address: Huawei Industrial Base
Bantian Longgang
Shenzhen 518129, P.R.China
www.huawei.com
-------------------------------------------------------------------------------------------------------------------------------------
This e-mail and its attachments contain confidential information from HUAWEI, which
is intended only for the person or entity whose address is listed above. Any use of the
information contained herein in any way (including, but not limited to, total or partial
disclosure, reproduction, or dissemination) by persons other than the intended
recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by
phone or email immediately and delete it!
 



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Best Regards

Jeff Zhang