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Re: how large can a cluster over the WAN be?

you are aware of? Thanks a lot, Miriam On Tue, Mar 1, 2011 at 9:47 PM, Mimi Aluminium wrote: > Hi, > Are there clusters of 100 nodes? more? Please can you refer me to such > installations/ systems? > Can you comment on over-the-WAN clusters in this size or less? and can you > point

how large can a cluster over the WAN be?

Hi, Are there clusters of 100 nodes? more? Please can you refer me to such installations/ systems? Can you comment on over-the-WAN clusters in this size or less? and can you point on system with nodes in different DCs connected by WAN ( could be dedicated or internet) ? Thanks a lot, Miriam Miria

Re: node failure, and automatic decommission (or removetoken)

y stable > number of nodes in the cluster. With the assumption the failures are > generally transitory. The features to handle permanent moves and removal are > somewhat heavy weight and not designed to be used frequently. > > Hope that helps > Aaron > On 1/03/2011, at 2:22 AM

Re: node failure, and automatic decommission (or removetoken)

n are the recommended approach. > > In your example though, with 3 nodes and an RF of 3 your cluster can > sustain a single node failure and continue to operate at CL Quorum for reads > and writes. So there is no immediate need to move data. > > Does that help? > > Aaron > > O

node failure, and automatic decommission (or removetoken)

Hi, I have a question about a tool or a wrapper that perform automatic data move upon node failure? Assuming I have 3 nodes with a replication factor of 3. In case of one node failure, does the third replica (that was located before on the failed node ) re-appears on one the of live nodes? I am lo

Re: cluster size, several cluster on one node for multi-tenancy

nant setups. > > You might have more luck partitioning tenants in to different clusters, but > then you end up with potential hot-spots (where more active tenants generate > more load on a specific cluster). > > Regards, > Nick > > > On 18 February 2011 09:55, Mimi Alumi

Re: cluster size, several cluster on one node for multi-tenancy

> > Bye, > > Norman > > > > 2011/2/17 Frank LoVecchio : > >> Why not just create some sort of ACL on the client side and use one > >> Keyspace? It's a lot less management. > >> > >> On Thu, Feb 17, 2011 at 12:34 PM, Mimi Aluminium <

Re: cluster size, several cluster on one node for multi-tenancy

Cassandra support several clusters per node? Does it mean several Cassandra daemons on each node? Do you recommend doing that ? what is the overhead? is there any link that explain how to do that? Thanks a lot, Mimi On Wed, Feb 16, 2011 at 6:43 PM, Mimi Aluminium wrote: > Hi, > We are interes

cluster size, several cluster on one node for multi-tenancy

Hi, We are interested in a multi-tenancy environment, that may consist of up to hundreds of data centers. The current design requires cross rack and cross DC replication. Specifically, the per-tenant CFs will be replicated 6 times: in three racks, with 2 copies inside a rack, the racks will be loc

Re: memory size and disk size prediction tool

to store? > > Hope that helps > Aaron > > On 21 Jan, 2011,at 05:04 AM, Mimi Aluminium > wrote: > > Hi, > > We are implementing a 'middlewear' layer to an underneath storage and > need to estimate costs for various system configurations. > Speci

memory size and disk size prediction tool

Hi, We are implementing a 'middlewear' layer to an underneath storage and need to estimate costs for various system configurations. Specifically, I want to estimate the resources (memory, disk) for our data model. Is there a tool that given certain storage configuration parameters, column family

Re: Multi-tenancy, and authentication and authorization

Hi, I have a question that somewhat related to the above. Is there a tool that predicts the resource consumption (i.e, memory, disk, CPU) in an offline mode? Means it is given with the storage conf parameters, ks, CFs and data model, and then application parameters such read/write average rates.