Maybe you can use zookeeper to achieve this
On Mon, Jan 25, 2010 at 3:20 PM, MOHAMMED IRFANULLA S < m.irfanu...@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 > > ------------------------------------------------------------------------------------------------------------------------------------- > 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! > > -- Best Regards Jeff Zhang
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