Re: hbase-regionserver1: bash: {HBASE_HOME}/bin/hbase-daemon.sh: No such file or directory

Ohh Thank you very much J-D, its working fine. I am very glad for getting your continuous help for hbase successfull setup. Soon i want to start a blog in which i would post clear setup of hbase and problems along with corresponding solutions i faced during setting up all these days. On Fri, De

Apache HBase Book updated and Home Page updated

Hi folks- The home page (http://hbase.apache.org) was reorganized and updated. Similar info, just a bit easier to read. Also, the book has been updated as well. Doug Meil Chief Software Architect, Explorys doug.m...@explorys.com

Re: HBase and Consistency in CAP

Thanks. I am having just bit of conflict in understanding how is random node failure different than network partition? In both cases there is an impact clearly visible to the user (time it takes to failover and replay logs)? On Fri, Dec 2, 2011 at 1:42 PM, Ian Varley wrote: > The simple answer is

Re: HBase and Consistency in CAP

The simple answer is that HBase isn't architected such that 2 region servers can simultaneously host the same region. In addition to being much simpler from an architecture point of view, that also allows for user-facing features that would be difficult or impossible to achieve otherwise: single

Re: Problem in configuring pseudo distributed mode

Can you give some more description about what is not working? Do you have hadoop running in pseudo-distributed mode? Can you give some error messages or log output or something like that? I think that could help in solving your problem. Regards, Christopher Am 02.12.2011 08:36, schrieb Mohammad

Re: HBase and Consistency in CAP

Thanks for the overview. It's helpful. Can you also help me understand why 2 region servers for the same row keys can't be running on the nodes where blocks are being replicated? I am assuming all the logs/HFiles etc are already being replicated so if one region server fails other region server is

Re: HBase and Consistency in CAP

Mohit, Yeah, those are great places to go and learn. To fill in a bit more on this topic: "partition-tolerance" usually refers to the idea that you could have a complete disconnection between N sets of machines in your data center, but still be taking writes and serving reads from all the serv

Re: HBase and Consistency in CAP

Get the HBase book: http://www.amazon.com/HBase-Definitive-Guide-Lars-George/dp/1449396100 And/Or read the Bigtable paper. J-D On Fri, Dec 2, 2011 at 12:01 PM, Mohit Anchlia wrote: > Where can I read more on this specific subject? > > Based on your answer I have more questions, but I want to re

Re: HBase and Consistency in CAP

Where can I read more on this specific subject? Based on your answer I have more questions, but I want to read more specific information about how it works and why it's designed that way. On Fri, Dec 2, 2011 at 11:59 AM, Jean-Daniel Cryans wrote: > No, data is only served by one region server (e

Re: HBase and Consistency in CAP

No, data is only served by one region server (even if it resides on multiple data nodes). If it dies, clients need to wait for the log replay and region reassignment. J-D On Fri, Dec 2, 2011 at 11:57 AM, Mohit Anchlia wrote: > Why is HBase consisdered high in consistency and that it gives up > p

HBase and Consistency in CAP

Why is HBase consisdered high in consistency and that it gives up parition tolerance? My understanding is that failure of one data node still doesn't impact client as they would re-adjust the list of available data nodes.

Re: hbase-regionserver1: bash: {HBASE_HOME}/bin/hbase-daemon.sh: No such file or directory

> i could not find 10.0.1.54:6 any where on the console, rather i found> > 127.0.1.1:6 in some places. Remove the 127.0.1.1 line in /etc/hosts, do it for all your ubuntu machines. J-D On Fri, Dec 2, 2011 at 6:34 AM, Vamshi Krishna wrote: > I disabled the firewall in all the machines.The

Re: hbase-regionserver1: bash: {HBASE_HOME}/bin/hbase-daemon.sh: No such file or directory

I disabled the firewall in all the machines.Then i started hbase(bin/start-hbase.sh), after 2-3 minutesi stopped hbase on master node (bin/stop-hbase.sh). Even then HRegionserver daemon is running on region server machine. So i checked regionserver machines log, the full log is here http://pastebi