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Posted to user@cassandra.apache.org by Roshan <co...@gmail.com> on 2012/10/29 22:57:24 UTC
Benifits by adding nodes to the cluster
Hi All
This may be a silly question, but what kind of benefits we can get by adding
new nodes to the cluster?
Some may be high availability. Any others?
/Roshan
--
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Sent from the cassandra-user@incubator.apache.org mailing list archive at Nabble.com.
Re: Benifits by adding nodes to the cluster
Posted by aaron morton <aa...@thelastpickle.com>.
I've not run it myself, but upgrading is part of the design.
Cheers
-----------------
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 1/11/2012, at 10:43 AM, Wei Zhu <wz...@yahoo.com> wrote:
> I heard about virtual nodes. But it doesn't come out until 1.2. Is it easy to convert the existing installation to use virtual nodes?
>
> Thanks.
> -Wei
>
> From: aaron morton <aa...@thelastpickle.com>
> To: user@cassandra.apache.org
> Sent: Wednesday, October 31, 2012 2:23 PM
> Subject: Re: Benifits by adding nodes to the cluster
>
>> I have been told that it's much easier to scale the cluster by doubling the
>> number of nodes, since no token changed needed on the existing nodes.
> Yup.
>
>> But if the number of nodes is substantial, it's not realistic to double it
>> every time.
> See the keynote from Jonathan Ellis or the talk on Virtual Nodes from Sam here
> http://www.datastax.com/events/cassandrasummit2012/presentations
>
> virtual nodes make this sort of thing faster and easier
>
>
>> How easy is to add let's say 3 additional nodes to the existing
>> 10 nodes?
> In that scenario would would need to move every node.
> But if you have 10 nodes you probably don't want to scale up by 3, I would guess 5 or 10. Scaling is not something you want to do every day.
>
> How easy the process is depends on the level of automation in your environment. For example Ops Centre can automate rebalancing nodes.
>
> Cheers
>
>
> -----------------
> Aaron Morton
> Freelance Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 31/10/2012, at 7:14 AM, weiz <wz...@yahoo.com> wrote:
>
>> One follow up questions.
>> I have been told that it's much easier to scale the cluster by doubling the
>> number of nodes, since no token changed needed on the existing nodes.
>> But if the number of nodes is substantial, it's not realistic to double it
>> every time. How easy is to add let's say 3 additional nodes to the existing
>> 10 nodes? I understand the process of moving around data and delete unused
>> data. Just want to understand from the operational point of view, how
>> difficult is that? We are in the processing of evaluating the nosql
>> solution, one important consideration is the operation cost. Any real world
>> experience is very much appreciated.
>>
>> Thanks.
>> -Wei
>>
>>
>>
>> --
>> View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Benifits-by-adding-nodes-to-the-cluster-tp7583437p7583466.html
>> Sent from the cassandra-user@incubator.apache.org mailing list archive at Nabble.com.
>
>
>
Re: Benifits by adding nodes to the cluster
Posted by Wei Zhu <wz...@yahoo.com>.
I heard about virtual nodes. But it doesn't come out until 1.2. Is it easy to convert the existing installation to use virtual nodes?
Thanks.
-Wei
________________________________
From: aaron morton <aa...@thelastpickle.com>
To: user@cassandra.apache.org
Sent: Wednesday, October 31, 2012 2:23 PM
Subject: Re: Benifits by adding nodes to the cluster
I have been told that it's much easier to scale the cluster by doubling the
>number of nodes, since no token changed needed on the existing nodes.Yup.
But if the number of nodes is substantial, it's not realistic to double it
>every time.See the keynote from Jonathan Ellis or the talk on Virtual Nodes from Sam here
http://www.datastax.com/events/cassandrasummit2012/presentations
virtual nodes make this sort of thing faster and easier
How easy is to add let's say 3 additional nodes to the existing
>10 nodes?In that scenario would would need to move every node.
But if you have 10 nodes you probably don't want to scale up by 3, I would guess 5 or 10. Scaling is not something you want to do every day.
How easy the process is depends on the level of automation in your environment. For example Ops Centre can automate rebalancing nodes.
Cheers
-----------------
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 31/10/2012, at 7:14 AM, weiz <wz...@yahoo.com> wrote:
One follow up questions.
>I have been told that it's much easier to scale the cluster by doubling the
>number of nodes, since no token changed needed on the existing nodes.
>But if the number of nodes is substantial, it's not realistic to double it
>every time. How easy is to add let's say 3 additional nodes to the existing
>10 nodes? I understand the process of moving around data and delete unused
>data. Just want to understand from the operational point of view, how
>difficult is that? We are in the processing of evaluating the nosql
>solution, one important consideration is the operation cost. Any real world
>experience is very much appreciated.
>
>Thanks.
>-Wei
>
>
>
>--
>View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Benifits-by-adding-nodes-to-the-cluster-tp7583437p7583466.html
>Sent from the cassandra-user@incubator.apache.org mailing list archive at Nabble.com.
>
Re: Benifits by adding nodes to the cluster
Posted by aaron morton <aa...@thelastpickle.com>.
> I have been told that it's much easier to scale the cluster by doubling the
> number of nodes, since no token changed needed on the existing nodes.
Yup.
> But if the number of nodes is substantial, it's not realistic to double it
> every time.
See the keynote from Jonathan Ellis or the talk on Virtual Nodes from Sam here
http://www.datastax.com/events/cassandrasummit2012/presentations
virtual nodes make this sort of thing faster and easier
> How easy is to add let's say 3 additional nodes to the existing
> 10 nodes?
In that scenario would would need to move every node.
But if you have 10 nodes you probably don't want to scale up by 3, I would guess 5 or 10. Scaling is not something you want to do every day.
How easy the process is depends on the level of automation in your environment. For example Ops Centre can automate rebalancing nodes.
Cheers
-----------------
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 31/10/2012, at 7:14 AM, weiz <wz...@yahoo.com> wrote:
> One follow up questions.
> I have been told that it's much easier to scale the cluster by doubling the
> number of nodes, since no token changed needed on the existing nodes.
> But if the number of nodes is substantial, it's not realistic to double it
> every time. How easy is to add let's say 3 additional nodes to the existing
> 10 nodes? I understand the process of moving around data and delete unused
> data. Just want to understand from the operational point of view, how
> difficult is that? We are in the processing of evaluating the nosql
> solution, one important consideration is the operation cost. Any real world
> experience is very much appreciated.
>
> Thanks.
> -Wei
>
>
>
> --
> View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Benifits-by-adding-nodes-to-the-cluster-tp7583437p7583466.html
> Sent from the cassandra-user@incubator.apache.org mailing list archive at Nabble.com.
Re: Benifits by adding nodes to the cluster
Posted by weiz <wz...@yahoo.com>.
One follow up questions.
I have been told that it's much easier to scale the cluster by doubling the
number of nodes, since no token changed needed on the existing nodes.
But if the number of nodes is substantial, it's not realistic to double it
every time. How easy is to add let's say 3 additional nodes to the existing
10 nodes? I understand the process of moving around data and delete unused
data. Just want to understand from the operational point of view, how
difficult is that? We are in the processing of evaluating the nosql
solution, one important consideration is the operation cost. Any real world
experience is very much appreciated.
Thanks.
-Wei
--
View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Benifits-by-adding-nodes-to-the-cluster-tp7583437p7583466.html
Sent from the cassandra-user@incubator.apache.org mailing list archive at Nabble.com.
Re: Benifits by adding nodes to the cluster
Posted by "Hiller, Dean" <De...@nrel.gov>.
1. High availability
2. You can hold much much more data
3. Better performance
4. You can do disaster recovery live-live datacenters (if you configure
cassandra)
On 10/29/12 4:02 PM, "Andrey Ilinykh" <ai...@gmail.com> wrote:
>This is how cassandra scales. More nodes means better performance.
>
>thank you,
> Andrey
>
>On Mon, Oct 29, 2012 at 2:57 PM, Roshan <co...@gmail.com> wrote:
>> Hi All
>>
>> This may be a silly question, but what kind of benefits we can get by
>>adding
>> new nodes to the cluster?
>>
>> Some may be high availability. Any others?
>>
>> /Roshan
>>
>>
>>
>> --
>> View this message in context:
>>http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Benifits
>>-by-adding-nodes-to-the-cluster-tp7583437.html
>> Sent from the cassandra-user@incubator.apache.org mailing list archive
>>at Nabble.com.
Re: Benifits by adding nodes to the cluster
Posted by Andrey Ilinykh <ai...@gmail.com>.
This is how cassandra scales. More nodes means better performance.
thank you,
Andrey
On Mon, Oct 29, 2012 at 2:57 PM, Roshan <co...@gmail.com> wrote:
> Hi All
>
> This may be a silly question, but what kind of benefits we can get by adding
> new nodes to the cluster?
>
> Some may be high availability. Any others?
>
> /Roshan
>
>
>
> --
> View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Benifits-by-adding-nodes-to-the-cluster-tp7583437.html
> Sent from the cassandra-user@incubator.apache.org mailing list archive at Nabble.com.