Hi, Any help on this please?
On Mon, Feb 3, 2014 at 12:14 PM, Shani Ranasinghe <shanir...@gmail.com>wrote: > > Hi, > I would like to know the following. > > 1) Can there be multiple namespaces in a single namenode? is it > recommended? (I'm having a multi-tenant environment in mind) > > 2) Let's say I have a federated namespace/namenodes. There are two > namenodes A /namespace A1 and namenode B/namespace B1, and have 3 > datanodes. Can someone from namespace A1, access the datanode's data in > anyway (hacking) belonging to namespace B1. If not how is it handled? > > After going through a lot of reference, my understanding on HDFS > multi-tenancy and federation is that for multi-tenancy what we could do is > use file/folder permissions (u,g,o) and ACL's. Or we could dedicate a > namespace per tenant. The issue here is that a namenode (active namenode, > passive namenode and secondary namenode) has to be assigned per tenant. Is > there any other way that multi tenancy can be achieved? > > On federation, let's say I have a namenode for /marketing and another for > /finance. Lets say that marketing bears the most load. How can we load > balance this? is it possible? > > Appreciate any help on this. > > Regards, > Shani. > > > >
