Now that I think about it, the reverse lookups in my clusters work. On Mon, May 11, 2009 at 3:07 AM, Steve Loughran <ste...@apache.org> wrote:
> jason hadoop wrote: > >> You should be able to relocate the cluster's IP space by stopping the >> cluster, modifying the configuration files, resetting the dns and starting >> the cluster. >> Be best to verify connectivity with the new IP addresses before starting >> the >> cluster. >> >> to the best of my knowledge the namenode doesn't care about the ip >> addresses >> of the datanodes, only what blocks they report as having. The namenode >> does >> care about loosing contact with a connected datanode, replicating the >> blocks that are now under replicated. >> >> I prefer IP addresses in my configuration files but that is a personal >> preference not a requirement. >> > > > I do deployments on to Virtual clusters without fully functional reverse > DNS, things do work badly in that situation. Hadoop assumes that if a > machine looks up its hostname, it can pass that to peers and they can > resolve it, the "well managed network infrastructure" assumption. > -- Alpha Chapters of my book on Hadoop are available http://www.apress.com/book/view/9781430219422 www.prohadoopbook.com a community for Hadoop Professionals
