riak_kv_cache_backend config questions

Tony Bussieres t.bussieres at gmail.com
Tue Aug 23 10:38:35 EDT 2011


Thanks Kelly!

So, if I understood well.

with a config like this :
riak_kv_cache_backend_ttl 60
*riak_kv_cache_backend_max_ttl 300

*If I put a key at time 0, and access it will disappear after 60 second.
If I put a key at time 0, and access it at time 50, it will disappear at
time 110
If I put a key at time 0, and access it every 15 seconds, it will disappear
after 300 seconds.

I'm I right?

Regards,

-tony



On Tue, Aug 23, 2011 at 10:22 AM, Kelly McLaughlin <kelly at basho.com> wrote:

> Tony,
>
> riak_kv_cache_backend_ttl is the amount of time to extend an object's lease
> or lifespan when accessed whereas *riak_kv_cache_backend_max_ttl is the
> amount of time after which no further extensions should be granted. *
>
> Kelly
>
>
> On Aug 23, 2011, at 7:49 AM, Tony Bussieres wrote:
>
> Hi all,
>
> Could someone explain with an example what's the difference between :
>
> *riak_kv_cache_backend_max_ttl
> and
> **riak_kv_cache_backend_ttl
>
> Does the value of riak_kv_backend_max_ttl is also in seconds?
>
> Here's a snippet from the documentation found at
> http://wiki.basho.com/Configuration-Files.html
> *
>
>    - *riak_kv_cache_backend*
>    A backend that behaves as an LRU-with-timed-expiry cache
>       - *riak_kv_cache_backend_memory*
>       Maximum amount of memory to allocate, in megabytes (default: “100”)
>       - *riak_kv_cache_backend_ttl*
>       Amount by which to extend an object’s expiry lease on each access,
>       in seconds (default: “600”)
>       - *riak_kv_cache_backend_max_ttl*
>       Maximum allowed lease time (default: “3600”)
>
> Thanks!
>
> -tony
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>
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