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Date: Tue, 30 Mar 2010 09:54:30 +0800
From: "zd.wbh"<zd.wbh@163.com>
To: "zookeeper-user"<zookeeper-user@hadoop.apache.org>
Message-ID: <1810056716.69201.1269914075988.JavaMail.zd.wbh@163.com>
Subject: How to ensure trasaction create-and-update
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hi，all

    we'd like to store some metadata in zookeeper in our upcoming project, here is a special but common case: we need to create a new znode, in the mean while, update another znode data. These manipulation(a create and a update) need to be done as atom. We don't want to see a successful creation and a failure updating. Is there a convenient way to ensure this operation? Can you give me some tips?

    I've looked into the src code, there is a tedious way to do. Extend zookeeper instruction, struct a "createAndUpdate" interface and a txn request, let DataTree to ensure the integrity. Will this do and the only way?

    Thanks a lot for all your attention.

2010-03-30


Will
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