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From Jeff Zhang <zjf...@gmail.com>
Subject Re: HDFS File read issue
Date Mon, 25 Jan 2010 07:36:04 GMT
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. [image: huawei_logo]
>
>
> Address: Huawei Industrial Base
> Bantian Longgang
> Shenzhen 518129, P.R.China
> www.huawei.com
>
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-- 
Best Regards

Jeff Zhang

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