Hello Alexey,
The node count is 20 per site and there will be two sites. RF=3. But since
the software isn't complete and the database code is going through a
rewrite we aren't sure about space requirements. The node count is only a
guess, bases on the number of dev nodes in use. We will have
Let me speak from my heart. I maintenance 200+TB Cassandra cluster. The problem
is money. If your IT people have a $$$ they can deploy Cassandra on super
robust hardware with triple power supply of course. But why then you need
Cassandra? Only for scalability?
The idea of high available
They do not use Raid10 on the node, they don't use dual power as well,
because it's not cheap in cluster of many nodes
I think the point here is that money spent on traditional failure avoidance
models is better spent in a Cassandra cluster by instead having more nodes
of less expensive
About the only thing you can say is two specific points:
1. A more resilient node is great, but it in no ways reduces or eliminates the
need total nodes. Sometimes nodes become inaccessible due to network outages or
system maintenance (e.g., software upgrades), or the vagaries of Java JVM and
Hello Jack,
Some really good points. I never thought of issues with the JVM or OOM
issues.
Thanks
Jabbar Azam
On 8 November 2014 16:52, Jack Krupansky j...@basetechnology.com wrote:
About the only thing you can say is two specific points:
1. A more resilient node is great, but it in no
With regards to money I think it's always a good idea to find a cost
effective solution. The problem is different people have different
interpretations of what cost effectiveness means. I'm referring to my
organisation. ;). I'm sure it happens in other organisations. Biases,
politics, experience,
I have used Supermicro servers in my previous work and they give excellent
quality for their money. They have been considered a bit cheap quality
wise in the past, but the current models are pretty good. They offer all
standard stuff like remote control cards (IPMI), dual power supplies (if
you
Hello Eric,
You make a good point about resiliency being applied at a higher level in
the stack.
Thanks
Jabbar Azam
On 8 November 2014 14:24, Eric Stevens migh...@gmail.com wrote:
They do not use Raid10 on the node, they don't use dual power as well,
because it's not cheap in cluster of
