thanks Ayon and sonal, one more thing
*question:- does the imbalance size in cluster is of any datanode create a problem...or have any bad impact* Acc to what you are saying my cluster would be of 10 DN of (2tb hdd) and 1 DN of (8tb HDD) does this make any bad impact. please suggest.. this all config with 16 gb ram Regards Vikas Srivastava On Tue, Sep 13, 2011 at 11:20 PM, Ayon Sinha <ayonsi...@yahoo.com> wrote: > What you can do for each node: > 1. decommission node (or 2 nodes if you want to do this faster). You can do > this with the excludes file. > 2. Wait for blocks to be moved off the decommed node(s) > 3. Replace the disks and put them back in service. > 4. Repeat until done. > > -Ayon > See My Photos on Flickr <http://www.flickr.com/photos/ayonsinha/> > Also check out my Blog for answers to commonly asked > questions.<http://dailyadvisor.blogspot.com> > > ------------------------------ > *From:* Vikas Srivastava <vikas.srivast...@one97.net> > *To:* user@hive.apache.org > *Sent:* Tuesday, September 13, 2011 5:27 AM > *Subject:* Re: Data migration in Hadoop > > hey sonal!! > > Actually right now we have 11 node cluster each having 8 disks of 3oogb and > 8gb ram, > > now what we want to do is to replace those 300gb disks with 1 tb disks so > that we can have more space per server. > > we have replication factor 2. > > my suggestion is .. > 1:- Add a node of 8 tb in cluster and run balancer to balance the load. > 2:- free any 1 node(repalcement node)..... > > question:- does the imbalance size in cluster is of any datanode create a > problem...or have any bad impact > > regards > Vikas Srivastava > > > On Tue, Sep 13, 2011 at 5:37 PM, Sonal Goyal <sonalgoy...@gmail.com>wrote: > > Hi Vikas, > > This was discussed in the groups recently: > > http://lucene.472066.n3.nabble.com/Fixing-a-bad-HD-tt2863634.html#none > > Are you looking at replacing all your datanodes, or only a few? how big is > your cluster? > > Best Regards, > Sonal > Crux: Reporting for HBase <https://github.com/sonalgoyal/crux> > Nube Technologies <http://www.nubetech.co> > > <http://in.linkedin.com/in/sonalgoyal> > > > > > > > On Tue, Sep 13, 2011 at 1:52 PM, Vikas Srivastava < > vikas.srivast...@one97.net> wrote: > > HI , > > can ny1 tell me how we can migrate hadoop or replace old hard disks with > new big size hdd. > > actually i need to replace old hdd of 300 tbs to 1 tb so how can i do this > efficiently!!! > > ploblem is to migrate data from 1 hdd to other > > > -- > With Regards > Vikas Srivastava > > DWH & Analytics Team > Mob:+91 9560885900 > One97 | Let's get talking ! > > > > > > -- > With Regards > Vikas Srivastava > > DWH & Analytics Team > Mob:+91 9560885900 > One97 | Let's get talking ! > > > > -- With Regards Vikas Srivastava DWH & Analytics Team Mob:+91 9560885900 One97 | Let's get talking !
