You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@cassandra.apache.org by cem <ca...@gmail.com> on 2013/12/11 01:02:41 UTC
2 nodes cassandra cluster raid10 or JBOD
Hi all,
I need to setup 2 nodes Cassandra cluster. I know that Datastax recommends
using JBOD as a disk configuration and have replication for the redundancy.
I was planning to use RAID 10 but using JBOD can save 50% disk space and
increase the performance . But I am not sure I should use JBOD with 2 nodes
cluster since there is a higher chance to lose 50% of our cluster compare
to a larger cluster. I may prefer to have stronger nodes if I have limited
number of nodes.
What do you think about that? Is there anyone who has 2 nodes cluster?
Best Regards,
Cem
Re: 2 nodes cassandra cluster raid10 or JBOD
Posted by cem <ca...@gmail.com>.
Thanks!
On Wed, Dec 11, 2013 at 9:37 PM, Aaron Morton <aa...@thelastpickle.com>wrote:
> If you have two nodes, and RF 2, you will only be able to use eventual
> consistency. If you want to have stronger consistency and some redundancy 3
> nodes is the minimum requirement.
>
> In the current setup, with only 2 nodes, I would use RAID 10 as it
> requires less operator intervention and there is a chance of data loss with
> RF 2. If a write (including the hints) is only committed to one node and
> the disk on that node fails the write will be lost.
>
> Hope that helps.
>
>
> -----------------
> Aaron Morton
> New Zealand
> @aaronmorton
>
> Co-Founder & Principal Consultant
> Apache Cassandra Consulting
> http://www.thelastpickle.com
>
> On 11/12/2013, at 9:33 pm, Veysel Taşçıoğlu <ve...@gmail.com>
> wrote:
>
> Hi,
>
> What about using JBOD and replication factor 2?
>
> Regards.
> On 11 Dec 2013 02:03, "cem" <ca...@gmail.com> wrote:
>
>> Hi all,
>>
>> I need to setup 2 nodes Cassandra cluster. I know that Datastax
>> recommends using JBOD as a disk configuration and have replication for the
>> redundancy. I was planning to use RAID 10 but using JBOD can save 50% disk
>> space and increase the performance . But I am not sure I should use JBOD
>> with 2 nodes cluster since there is a higher chance to lose 50% of our
>> cluster compare to a larger cluster. I may prefer to have stronger nodes if
>> I have limited number of nodes.
>>
>>
>> What do you think about that? Is there anyone who has 2 nodes cluster?
>>
>>
>> Best Regards,
>>
>> Cem
>>
>
>
Re: 2 nodes cassandra cluster raid10 or JBOD
Posted by Aaron Morton <aa...@thelastpickle.com>.
If you have two nodes, and RF 2, you will only be able to use eventual consistency. If you want to have stronger consistency and some redundancy 3 nodes is the minimum requirement.
In the current setup, with only 2 nodes, I would use RAID 10 as it requires less operator intervention and there is a chance of data loss with RF 2. If a write (including the hints) is only committed to one node and the disk on that node fails the write will be lost.
Hope that helps.
-----------------
Aaron Morton
New Zealand
@aaronmorton
Co-Founder & Principal Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
On 11/12/2013, at 9:33 pm, Veysel Taşçıoğlu <ve...@gmail.com> wrote:
> Hi,
>
> What about using JBOD and replication factor 2?
>
> Regards.
>
> On 11 Dec 2013 02:03, "cem" <ca...@gmail.com> wrote:
> Hi all,
>
> I need to setup 2 nodes Cassandra cluster. I know that Datastax recommends using JBOD as a disk configuration and have replication for the redundancy. I was planning to use RAID 10 but using JBOD can save 50% disk space and increase the performance . But I am not sure I should use JBOD with 2 nodes cluster since there is a higher chance to lose 50% of our cluster compare to a larger cluster. I may prefer to have stronger nodes if I have limited number of nodes.
>
> What do you think about that? Is there anyone who has 2 nodes cluster?
>
>
>
> Best Regards,
>
> Cem
>
Re: 2 nodes cassandra cluster raid10 or JBOD
Posted by Veysel Taşçıoğlu <ve...@gmail.com>.
Hi,
What about using JBOD and replication factor 2?
Regards.
On 11 Dec 2013 02:03, "cem" <ca...@gmail.com> wrote:
> Hi all,
>
> I need to setup 2 nodes Cassandra cluster. I know that Datastax
> recommends using JBOD as a disk configuration and have replication for the
> redundancy. I was planning to use RAID 10 but using JBOD can save 50% disk
> space and increase the performance . But I am not sure I should use JBOD
> with 2 nodes cluster since there is a higher chance to lose 50% of our
> cluster compare to a larger cluster. I may prefer to have stronger nodes if
> I have limited number of nodes.
>
>
>
> What do you think about that? Is there anyone who has 2 nodes cluster?
>
>
> Best Regards,
>
> Cem
>