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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: Building a brand new cluster and readying it for production -- advice needed
Date Wed, 14 Mar 2012 04:03:08 GMT
Agreed if you are using SSD you likely will not need much as much RAM.
I said "You could always do better with more RAM" not "You should
definitely get more RAM" :)

On Tue, Mar 13, 2012 at 7:37 PM, Maxim Potekhin <potekhin@bnl.gov> wrote:
> Thank you Edward.
>
> As can be expected, my data volume is a multiple of whatever RAM I can
> realistically buy, and in fact much bigger. In my very limited experience,
> the money might be well spent on multicore CPUs because it makes routine
> operations like compact/repair (which always include writes) so much faster,
> hence reducing
> the periods of high occupancy. I'm trying to scope out how much SSD I will
> need because
> it appears to be an economical solution to problems I had previously had.
>
> Regards,
> Maxim
>
>
> On 3/13/2012 10:40 PM, Edward Capriolo wrote:
>>
>> I am 1.0.7. I would suggest that. The memtable and JAMM stuff is very
>> stable. I would not setup 0.8.X because with 1.1 coming soon 0.8.X is
>> not likely to see to many more minor releases. You can always do
>> better with more RAM up to the size of your data, having more ram them
>> data size will not help noticeably . The off heap row cache can use
>> this and the OS can cache disk blocks with it.
>>
>> Edward
>>
>> On Tue, Mar 13, 2012 at 3:15 PM, Maxim Potekhin<potekhin@bnl.gov>  wrote:
>>>
>>> Dear All,
>>>
>>> after all the testing and continuous operation of my first cluster,
>>> I've been given an OK to build a second production Cassandra cluster in
>>> Europe.
>>>
>>> There were posts in recent weeks regarding the most stable and solid
>>> Cassandra version.
>>> I was wondering is anything better has appeared since it was last
>>> discussed.
>>>
>>> At this juncture, I don't need features, just rock solid stability. Are
>>> 0.8.* versions still acceptable,
>>> since I have experience with these, or should I take the plunge to 1+?
>>>
>>> I realize that I won't need more than 8GB RAM because I can't make Java
>>> heap
>>> too big. Is worth it
>>> still to pay money for extra RAM? Is the cache located outside of heap in
>>> recent versions?
>>>
>>> Thanks to all of you for the advice I'm receiving on this board.
>>>
>>> Best regards
>>>
>>> Maxim
>>>
>

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