> You add a physical node and that in turn adds num_token tokens to the ring.
No, I am talking about Virtual Nodes with order preserving partitioner. For an existing host with multiple tokens setting list on cassandra.inital_token. After initial bootstrapping, the host will not aware changes of cassandra.inital_token. If I want add a new token( virtual node), I have to rebuild the host with new token list. My question is if there is way to add a virtual nodes without rebuild it? Thanks, On Jan 30, 2013, at 10:21 AM, Manu Zhang wrote: > On Wed 30 Jan 2013 02:29:27 AM CST, Zhong Li wrote: >> One more question, can I add a virtual node manually without reboot >> and rebuild a host data? >> >> I checked nodetool command, there is no option to add a node. >> >> Thanks. >> >> Zhong >> >> >> On Jan 29, 2013, at 11:09 AM, Zhong Li wrote: >> >>> I was misunderstood this >>> http://www.datastax.com/dev/blog/virtual-nodes-in-cassandra-1-2 , >>> especially >>> "If you want to get started with vnodes on a fresh cluster, however, >>> that is fairly straightforward. Just don’t set the >>> |initial_token| parameter in your|conf/cassandra.yaml| and instead >>> enable the |num_tokens| parameter. A good default value for this is 256" >>> >>> Also I couldn't find document about set multiple tokens >>> for cassandra.inital_token >>> >>> Anyway, I just tested, it does work to set comma separated list of >>> tokens. >>> >>> Thanks, >>> >>> Zhong >>> >>> >>> On Jan 29, 2013, at 3:06 AM, aaron morton wrote: >>> >>>>> After I searched some document on Datastax website and some old >>>>> ticket, seems that it works for random partitioner only, and leaves >>>>> order preserved partitioner out of the luck. >>>> Links ? >>>> >>>>> or allow add Virtual Nodes manually? >>>> If not looked into it but there is a cassandra.inital_token startup >>>> param that takes a comma separated list of tokens for the node. >>>> >>>> There also appears to be support for the ordered partitions to >>>> generate random tokens. >>>> >>>> But you would still have the problem of having to balance your row >>>> keys around the token space. >>>> >>>> Cheers >>>> ----------------- >>>> Aaron Morton >>>> Freelance Cassandra Developer >>>> New Zealand >>>> >>>> @aaronmorton >>>> http://www.thelastpickle.com <http://www.thelastpickle.com/> >>>> >>>> On 29/01/2013, at 10:31 AM, Zhong Li <z...@voxeo.com >>>> <mailto:z...@voxeo.com>> wrote: >>>> >>>>> Hi All, >>>>> >>>>> Virtual Nodes is great feature. After I searched some document on >>>>> Datastax website and some old ticket, seems that it works for >>>>> random partitioner only, and leaves order preserved partitioner out >>>>> of the luck. I may misunderstand, please correct me. if it doesn't >>>>> love order preserved partitioner, would be possible to add support >>>>> multiple initial_token(s) for order preserved partitioner or >>>>> allow add Virtual Nodes manually? >>>>> >>>>> Thanks, >>>>> >>>>> Zhong >>>> >>> >> > > You add a physical node and that in turn adds num_token tokens to the ring.
