Re: Best Practice to add a node in a Cluster

Thans Arun ! On Tue, Apr 28, 2015 at 9:44 AM, arun sirimalla wrote: > Hi Neha, > > > After you add the node to the cluster, run nodetool cleanup on all nodes. > Next running repair on each node will replicate the data. Make sure you > run the repair on one node at a time, because repair is an ex

Re: Best Practice to add a node in a Cluster

Hi Neha, After you add the node to the cluster, run nodetool cleanup on all nodes. Next running repair on each node will replicate the data. Make sure you run the repair on one node at a time, because repair is an expensive process (Utilizes high CPU). On Mon, Apr 27, 2015 at 8:36 PM, Neha Tr

Re: Best Practice to add a node in a Cluster

Thanks Eric and Matt :) !! Yes the purpose is to improve reliability. Right now, from our driver we are querying using degradePolicy for reliability. *For changing the keyspace for RF=3, the procedure is as under:* 1. Add a new node to the cluster (new node is not in seed list) 2. ALTER KEYSPA

minimum bandwidth requirement between two Geo Redundant sites of Cassandra database

Hi, Is there any minimum bandwidth requirement between two Geo Redundant data centres? What is the minimum latency that link between two Geo Redundant data centres should have to get best efficient operations? Regards, Gaurav

New node got stuck joining the cluster after a while

Hello guys, I have a cluster comprised of 2 nodes, configured with vnodes. Using 2.1.0-2 version of cassandra. And I am facing an issue when I want to joing a new node to the cluster. At first starting joining but then it got stuck: UN 1x.x.x.x 348.11 GB 256 100.0%xx

Re: Datastax EC2 Ami

Hi, I would remove the node and start a new one. You can pick a specific Cassandra release using user data (eg. --release 2.0.11) Cheers, Tommaso On Mon, Apr 27, 2015 at 8:53 PM, Eduardo Cusa < eduardo.c...@usmediaconsulting.com> wrote: > Hi Guys, we start our cassandra cluster with the followi

Datastax EC2 Ami

Hi Guys, we start our cassandra cluster with the following ami : ami-ada2b6c4 https://console.aws.amazon.com/ec2/home?region=us-east-1#LaunchInstanceWizard:ami=ami-ada2b6c4 Now we need to add a new node and we realize this ami has cassandra 2.1.4 intead of 2.1.0-2. Is it safe to join this nod

Fwd: Data Modelling Help

Hi, I am a newbie with Cassandra and thus need data modelling help as I haven't found a resource that tackles the same problem. The user case is similar to an email-system. I want to store a timeline of all emails a user has received and then fetch them back with three different ways: 1. All ema

Re: Never dropped droppable tombstoned data with LCS

On Sun, Apr 26, 2015 at 1:50 PM, Safa Topal wrote: > We have a 3 node cluster with Cassandra 2.0.8 version. I am seeing data > that should be dropped already. In JMX, I can see that > DroppableTombstoneRatio is 0.68 for the column family and the > tombstone_threshold was left as default for the C

RE: Best Practice to add a node in a Cluster

Hi Neha, I guess it depends why you are adding a new node – do you need more storage capacity, do you want better resilience, or are you trying to increase performance? If you add a new node with the same amount of storage as the previous two, but you increase the RF, you will use up all of t

Re: Best Practice to add a node in a Cluster

It depends on why you're adding a new node. If you're running out of disk space or IO capacity in your 2 node cluster, then changing RF to 3 will not improve either condition - you'd still be writing all data to all three nodes. However if you're looking to improve reliability, a 2 node RF=2 clus

Best Practice to add a node in a Cluster

Hi We have a 2 Cluster Node with RF=2. We are planing to add a new node. Should we change RF to 3 in the schema? OR Just added a new node with the same RF=2? Any other Best Practice that we need to take care? Thanks regards Neha

Re: is Thrift support, from Cassandra, really mandatory for OpsCenter monitoring ?

On 04/27/2015 08:18 AM, DE VITO Dominique wrote: Just to know, is a OpsCenter future version, not relying on a mandatory Thrift interface, on the road ? Yes. -- Kind regards, Michael

is Thrift support, from Cassandra, really mandatory for OpsCenter monitoring ?

Hi, While reading the OpsCenter 5.1 docs, it looks like OpsCenter can't work if Cassandra does not provide a Thrift interface (see [1] below). Is it really the case ? At first sight, it sounded weird to me, as CQL 3 is provided for months. Just to know, is a OpsCenter future version, not relyi

Re: Data model suggestions

No - it immediately removes the sstables on all nodes. On Mon, Apr 27, 2015 at 7:53 AM, Ali Akhtar wrote: > Wouldn't truncating the table create tombstones? > > On Mon, Apr 27, 2015 at 11:55 AM, Peer, Oded wrote: > >> I recommend truncating the table instead of dropping it since you don’t >> n

Re: Data model suggestions

Wouldn't truncating the table create tombstones? On Mon, Apr 27, 2015 at 11:55 AM, Peer, Oded wrote: > I recommend truncating the table instead of dropping it since you don’t > need to re-issue DDL commands and put load on the system keyspace. > > Both DROP and TRUNCATE automatically create sna