Our RF is 2 and we are planning to keep that. Thanks for addressing the decommissioning puzzle. That is where I could not find any doc.
Hiren From: aaron morton [mailto:aa...@thelastpickle.com] Sent: Wednesday, September 21, 2011 6:01 PM To: user@cassandra.apache.org Subject: Re: Cassandra reconfiguration What are the token assignments and what is the RF ? Without knowing the details I would guess... Make the RF changes you want for DC 1 and 2 and repair. decomission the nodes in DC3 one at a time. Cheers ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 22/09/2011, at 5:29 AM, Hiren Shah wrote: Hi, We have cassandra in production in three data centers with five nodes each. We are getting rid of one of the data centers, so I want to reconfig my cluster to two data centers, seven nodes each. I first need to shut down DC3. I have already shut down traffic to DC3 and am running repairs. My priority #1 is to maintain the stability of overall cluster (the two live data centers). Some data loss is tolerable, but it will be ideal if I can avoid that. What is the best way to decommission entire data center? Should I issue decommission to the nodes one by one? Will that put additional load on remaining nodes in DC3? Or should I just shut them down and then run removetoken for these nodes? Or is there a better way? Thanks in advance, Hiren Shah
