A cautionary note with this problem - who says when 2 minutes is up? Clocks will go forward at different rates and with different offsets. You cannot rely on two machines having the same perception of what 2 minutes means. In general, in distributed systems, it's a good design principle to minimise any dependence on a common notion of real time.
That said the best way is to pick some machine, like Mahadev says, to retire old locks by polling every N seconds, where N is the slop you can afford. What problem are you actually trying to solve? cheers, Henry On 24 February 2010 03:40, Martin Waite <waite....@googlemail.com> wrote: > Hi, > > Is there a good model for implementing leases in Zookeeper ? > > What I want to achieve is for a client to create a lock, and for that lock > to disappear two minutes later - regardless of whether the client is still > connected to zk. Like ephemeral nodes - but with a time delay. > > regards, > Martin > -- Henry Robinson Software Engineer Cloudera 415-994-6679
