Re: Update the Keyspace replication factor online

2011-04-14 Thread Yudong Gao
about down time during repair have to do with the potential > impact of repair slowing nodes way down. > > Hope that helps > Aaron > > On 13 Apr 2011, at 16:00, Yudong Gao wrote: > >> Thanks for the reply, Aaron! >> >> On Tue, Apr 12, 2011 at 10:52 PM, aar

Re: Update the Keyspace replication factor online

2011-04-12 Thread Yudong Gao
n move whole nodes by moving all their data with them, assigning a new > ip, and updating the topology file if used. > > Aaron > > On 13 Apr 2011, at 07:56, Yudong Gao wrote: > >> Hi, >> >> What operations will be executed (and what is the associated overhead) >

Update the Keyspace replication factor online

2011-04-12 Thread Yudong Gao
Hi, What operations will be executed (and what is the associated overhead) when the Keyspace replication factor is changed online, in a multi-datacenter setup with NetworkTopologyStrategy? I checked the wiki and the archive of the mailing list and find this, but it is not very complete. http://w

Re: Location-aware replication based on objects' access pattern

2011-04-06 Thread Yudong Gao
On Wed, Apr 6, 2011 at 3:55 AM, Sasha Dolgy wrote: > I had been asked this question from a strategy point of view, and > referenced how linkedin.com appears to handle this. > > > Specific region data is stored on a ring in that region.  While based > in the middle east, my linkedin.com profile wa

Re: Location-aware replication based on objects' access pattern

2011-04-05 Thread Yudong Gao
On Tue, Apr 5, 2011 at 9:59 PM, Jonathan Ellis wrote: > On Tue, Apr 5, 2011 at 8:37 PM, Yudong Gao wrote: >> One thing I am worrying about is how to maintain the location >> information for each row. The current partitioner maps a key to MD5 >> hash, and it is almost impo

Re: Location-aware replication based on objects' access pattern

2011-04-05 Thread Yudong Gao
> On Tue, Apr 5, 2011 at 5:05 PM, Yudong Gao wrote: > > > > Hi, > > > > I am thinking about using Cassandra for our research project, and we > > are thinking about one interesting feature. > > > > Our setup has multiple datacenters located in different

Location-aware replication based on objects' access pattern

2011-04-05 Thread Yudong Gao
Hi, I am thinking about using Cassandra for our research project, and we are thinking about one interesting feature. Our setup has multiple datacenters located in different geography locations. Data is accessed with predictable patterns. Think of something like Craigslist, data objects correspon