Both PHP clients use the same basic logic. Either modulus hashing or
consistent "ring" hashing.
http://www.mikeperham.com/2009/01/14/consistent-hashing-in-memcache-client/
Brian.
--------
http://brian.moonspot.net/
On 10/11/13 16:01 , SivaRam M wrote:
Yeah sure .I'm going to through php client simulating how memcache works
. Thanks for the tip :)
On Friday, 11 October 2013 16:54:10 UTC-4, perrin wrote:
It's entirely up to the client and all of them do it differently.
You need to look at the client you're using to learn about how it
chooses a server.
- Perrin
On Fri, Oct 11, 2013 at 4:12 PM, SivaRam M <siva...@gmail.com
<javascript:>> wrote:
Thanks Perrin for correcting me and for the link. can you guide
me where can i properly understand how client will find which
server it has to send the key.
On Friday, 11 October 2013 11:36:34 UTC-4, perrin wrote:
Hi,
Are you talking about a client library? The memcached
server doesn't know anything about other servers and doesn't
dispatch requests.
https://code.google.com/p/__memcached/wiki/NewOverview#__Smarts_Half_in_Client,_Half___in_Server
<https://code.google.com/p/memcached/wiki/NewOverview#Smarts_Half_in_Client,_Half_in_Server>
- Perrin
On Fri, Oct 11, 2013 at 3:12 AM, SivaRam M
<siva...@gmail.com> wrote:
HI ,
I wanted to know how distributed hashing works and
exact workflow of any of the GET/STORE/DELETE .
I have gone through the code in memcached.c and there is
a pool of connections for requests . I'm finding it
tedious to understand.
* thread.c which calls item_get () which uses a hash
functions from hash.c (I think this is hash returns
IP of the server)
* item_get() function again calls do_item_get() from
items.c which calls assoc_find() .( this hash for
which bucket the item has to go )
This is what I understood from the material i have gone
through . libevent has a pool of threads and when ever
there is a request from client it randomly sent to a
server A and from there after hashing the request is
sent to proper server B.
I just want to know what happens in these two functions
and when any of the GET/STORE/DELETE is called how a
request is passed to the correct server where key item
is present from client side . Please correct me if I'm
wrong in understanding concepts.
Thanks
Mothiki
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