[OpenSIPS-Users] questions on localcache and memcache module

[Bogdan-Andrei Iancu]

Hi Jayesh,

Jayesh Nambiar wrote:
> Hi All,
> I have a requirement of storing approximately 25000 IP Addresses in 
> Cache for faster processing.
Note that the permission module (address table) does caching of the IPs 
- it loads the IPs from address table at startup and use at runtime only 
cache ; also it provides a reload functionality (for runtime, to refresh 
cache from DB). See:
    
http://www.opensips.org/html/docs/modules/1.6.x/permissions.html#sec-address-permissions
    
http://www.opensips.org/html/docs/modules/1.6.x/permissions.html#id267314
    
http://www.opensips.org/html/docs/modules/1.6.x/permissions.html#id267431
    
http://www.opensips.org/html/docs/modules/1.6.x/permissions.html#id267516
> I also have requirement of keeping the expiry period pretty high which 
> would be like 10 days. There are certain key-values which might also 
> have expiry value of 30 days, so different keys might have different 
> expiry time.
with permissions, you can reload the IPs at any time.
> For the above mentioned requirement, is the localcache sufficient or 
> memcached server is recommended?
I would go for memcached, as localcahe is not restart persistent - you 
will loose the content when restarting. Also the localcache is a cache 
to be used (put and get) only by opensips, so you cannot interface with 
other application...
> What should be the ideal value of cache_table_size parameter if I go 
> ahead with the localcache module?
for 25K records, considering a 10 addresses per hash entry -> 2500 
entries -> use size 11 (2048 entries)
> Are there fifo commands available or any other way through which I can 
> flush the values in the cache table other than restarting the opensips 
> service?
localcache has no db persistence
> Are there any known issues or problems while using these modules in 
> large number of transactions per second traffic scenarios?
not known

Regards,
Bogdan
>
> Your views, comments and help is really appreciated.
>
> Thanks in advance,
>
> --- Jayesh
> ------------------------------------------------------------------------
>
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>   


-- 
Bogdan-Andrei Iancu
OpenSIPS Bootcamp
20 - 24 September 2010, Frankfurt, Germany
www.voice-system.ro