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Posted to user@ignite.apache.org by Ravi <ra...@gmail.com> on 2016/01/22 10:53:13 UTC

Affinity Key??

what is affinity in practical terms. and affinity is predefined term or we
need to make affinity function?



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Re: Affinity Key??

Posted by Artem Shutak <as...@gridgain.com>.

Hi, Ravi,

Please, refer to the Affinity documentation:
- https://apacheignite.readme.io/docs/affinity-collocation 
- https://apacheignite.readme.io/docs/cache-modes

Thanks,
Artem.



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Re: Affinity Key??

Posted by Andrey Nestrogaev <a....@flexsoft.com>.

Hi!

You can gather more information about affinity after reading the javadoc for
classes
http://ignite.apache.org/releases/1.5.0-b1/javadoc/org/apache/ignite/cache/affinity/AffinityFunction.html
http://ignite.apache.org/releases/1.5.0-b1/javadoc/org/apache/ignite/cache/affinity/AffinityKeyMapped.html
http://ignite.apache.org/releases/1.5.0-b1/javadoc/org/apache/ignite/cache/affinity/AffinityKeyMapper.html





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Re: Affinity Key??

Posted by vkulichenko <va...@gmail.com>.

Hi Ravi,


Ravi wrote
> what is affinity in practical terms. and affinity is predefined term or we
> need to make affinity function?

Affinity is a function that maps any cache key to a node where entry for
this key is stored. It's pluggable in Ignite, so you're free to create your
own function, but in 99.(9)% of use cases it's not needed and you can just
use the default one provided out of the box.

Please let us know if you have any specific follow up questions.

-Val



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