On Fri, Aug 12, 2011 at 3:17 AM, 然 安 <[email protected]> wrote:
> Hi, Trond. I have read the man page for the function memcached_pool_pop(),
> but I still don't know what's the meaning of the parameter bool block.
>
>
If you create a pool with 5 instances and your code tries to pop 6 instances
out of the pool. if you set the block parameter to true, the 6th call to pop
will block until someone push an instance back into the pool.
> I think the libmemcached uses the pool to store the memcached_st, and
> memcached_st keeps a connection with each server in the configuration
> string.But, can multiple memcached_st be stored in the same pool? Can a
> memcached_st be poped multiple times? Does it mean a pool can only keep a
> long cnnection with each server in the configuration string.
>
The pool is used to store memcached_st instances, and you can push and pop
the instances as many times as you like. The idea of the pool is that
instead of doing:
my_little_function_who_needs_memcached() {
create memcached_st
call a libemcached function
destroy memcached_st
}
you would do something like:
my_little_function_who_needs_memcached(pool) {
grab instance from the pool
call a libemcached function
push it back to the pool
}
Trond
> Thank you for your reply.
>
>
> --- *11年8月11日，周四, Trond Norbye <[email protected]>* 写道：
>
>
> 发件人: Trond Norbye <[email protected]>
> 主题: Re: Can anyone tell me the benifit of libmemcached pool?
> 收件人: [email protected]
> 日期: 2011年8月11日,周四,下午6:48
>
>
> make install will also install a manual page for the functions..
>
> Cheers,
>
> Trond
>
>
> On Thu, Aug 11, 2011 at 10:29 AM, 然 安
> <[email protected]<http://cn.mc157.mail.yahoo.com/mc/[email protected]>
> > wrote:
>
>
> Hi, if I define a memcached pool like this:
> memcached_pool_st* pool=memcached_pool("--SERVER=ip:port",config_length);
> can I pop memcached_st multiple times use this pool? like:
> memcached_st *memc1 = memcached_pool_pop(pool,false,&rc);
> memcached_st *memc2 = memcached_pool_pop(pool,false,&rc);
>
> can anywhere I find the detailed explanation of these functions, including
> the returen value and parameters?
> thank you very much!
> --- *11年7月30日，周六, Brian Aker
> <[email protected]<http://cn.mc157.mail.yahoo.com/mc/[email protected]>
> >* 写道：
>
>
> 发件人: Brian Aker
> <[email protected]<http://cn.mc157.mail.yahoo.com/mc/[email protected]>>
>
>
> 主题: Re: Can anyone tell me the benifit of libmemcached pool?
> 收件人:
> [email protected]<http://cn.mc157.mail.yahoo.com/mc/[email protected]>
> 日期: 2011年7月30日,周六,上午7:02
>
>
> BTW it works out well for non-threaded applications as well, since it is a
> pretty easy API to use for just caching the connection between page calls
> (i.e. and application running in Apache)
>
> On Jul 29, 2011, at 12:45 PM, Trond Norbye wrote:
>
> > You would use a pool of libmemcached instances in your multithreaded
> application to avoid initiating, connect, disconnect and destroy each time
> one of the threads wants to send a request to the memcached cluster. Instead
> you can get an instance from the pool, use it, and put it back in the pool
> for other threads to use..
> >
> > Cheers
> >
> > Trond
> >
>
>
>
>
> --
> Trond Norbye
>
>
--
Trond Norbye
