> When you try to get a row, the client will access to a RegionServer > directly, which serving a region containing the row you want to retrieve.
Didn't know for this :) Looks like I'll have to try something else... Thank you Koji! Sanel. On Wed, Oct 6, 2010 at 4:01 PM, Koji Kawamra <[email protected]> wrote: > Hi Sanel > > Even if you could connect to the ZooKeeper and the HMaster, I think the > RegionServers are gonna be the next you have to deal with. > > When you try to get a row, the client will access to a RegionServer directly, > which serving a region containing the row you want to retrieve. > > As far as I know, only an information of which RegionServer is serving the > region is exchanged between a client and the HMaster, and actual data is done > between a client and a RegionServer. > > With best regards, Koji. > > > On 2010/10/06, at 21:29, Sanel Zukan <[email protected]> wrote: > >> Hi to all, >> >> I'm working on a program that is trying to connect to HBase cluster via >> ssh tunneling feature. Basically, the cluster is set behind single >> entry point (one machine protected with firewall from outside access) >> and only ssh port allowed. >> >> ssh tunneling is done like this: >> >> ssh u...@host -L 60000:hmaster:60000 -L 2181:hmaster:2181 -N >> >> which basically means to start listening on 60000 and 2181 ports >> (HMaster and ZK ports) and forward secured connection to HOST as 'user', >> from where it is tunneled to 'hmaster' where HMaster and Zookeeper are >> running. >> >> From application, I'm making connection like this: >> >> HBaseConfiguration conf = new HBaseConfiguration(); >> conf.set("hbase.master", "localhost"); >> conf.set("hbase.zookeeper.quorum", "localhost"); >> >> HBaseAdmin admin = new HBaseAdmin(conf); >> >> From here, connection to Zookeeper is made successfully, but connection >> to HMaster is not, as code will try to use HMaster address fetched from >> Zookeeper, which is 'hmaster' in this case, the name not visible and not >> accessible outside cluster entry point. >> >> Does anyone knows (or maybe had a similar case) how to manually set >> HMaster address, but keep connection to Zookeeper, as (seems to me) >> 'hbase.master' value is ignored somehow? >> >> Thanks. >> Sanel > >
