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From Jason Wee <peich...@gmail.com>
Subject Re: offheap component
Date Thu, 02 Jan 2014 06:08:53 GMT
Solely by the Cassandra version.  Are you asking about a particular
component not mentioned above?

Not exactly. From version to version, the component of cassandra may reside
on heap or off heap, so is there a way to determine which component in the
cassandra version that may reside on heap or off heap?


On Wed, Jan 1, 2014 at 1:25 AM, Tyler Hobbs <tyler@datastax.com> wrote:

>
> On Tue, Dec 31, 2013 at 7:35 AM, Jason Wee <peichieh@gmail.com> wrote:
>
>>
>> In Cassandra 1.2 and later, the Bloom filter and compression offset map
>> that store this metadata reside off-heap, greatly increasing the capacity
>> per node of data that Cassandra can handle efficiently. In Cassandra 2.0,
>> the partition summary also resides off-heap.
>>
>> How do we determine if a cassandra component is on heap or offheap?
>>
>
> Solely by the Cassandra version.  Are you asking about a particular
> component not mentioned above?
>
>
>>
>> By off-heap, it means that the object is stored *not* in the allocated
>> heap in jvm but in native memory?
>>
>
> That's correct.
>
>
> --
> Tyler Hobbs
> DataStax <http://datastax.com/>
>

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