[infinispan-dev] staggered_get Question

[Mircea Markus]

On 12 Jul 2013, at 17:53, Sanne Grinovero <sanne at infinispan.org> wrote:

> Hi Erik,
> could you elaborate on how "proximate" would look like please? I'm not
> understanding how X-Site is relating to this.
> 
> Mircea,
> how is a secondary owner going to behave when setting MAIN_OWNER ?

the second owner would read it locally for now

> 
> -Sanne
> 
> On 12 July 2013 17:21, Erik Salter <an1310 at hotmail.com> wrote:
>> - my boss and others.
>> 
>> Why not proximate?  I may only want to get data from the same machine/site
>> and retry if necessary.
>> 
>> Erik
>> 
>> -----Original Message-----
>> From: infinispan-dev-bounces at lists.jboss.org
>> [mailto:infinispan-dev-bounces at lists.jboss.org] On Behalf Of Mircea Markus
>> Sent: Friday, July 12, 2013 11:56 AM
>> To: Hammad Said; infinispan -Dev List
>> Cc: Bryan Perrotti (bperrott); Erik Salter (esalter); Michael Walker; Balaji
>> Rajam
>> Subject: Re: [infinispan-dev] staggered_get Question
>> 
>> 
>> On 12 Jul 2013, at 18:22, Mircea Markus <mmarkus at redhat.com> wrote:
>> 
>>> (Adding -dev)
>>> 
>>> On 12 Jul 2013, at 05:04, Hammad Said <hsaid at redhat.com> wrote:
>>> 
>>>> I have implemented the change for address ordering in and created the
>> topic branch optimize_staggered-get in:
>>>> https://github.com/hsaid4327/infinispan.git
>>> 
>>> which branch do you want me to look at?
>>> Or better can you please issue a pull request with your change?
>>> 
>>>> 
>>>> The next part is the configuration change. For the configuration change,
>> there are certain design decisions that need to be made:
>>>> a) We need to introduce two configuration params staggered_get_flag and
>> staggered_get_timeout. Where exactly are these params specified in the cache
>> configuration file. At the global or the cache level and under what element.
>> Are they be implemented as attributes of clustering element, separate
>> element as a child of clustering or cache.
>>> 
>>> What about something like:
>>> <cluseter>
>>> <remoteReads policy="ALL|STAGGER|MAIN_OWNER" staggerTimeout="50"/>
>> 
>> to clarify there are 3 ways of doing remote reads: all owners (like we
>> currently do), staggered (as discussed) and only to the main owner.
>> 
>>> </cluster>
>>> 
>>> What others think?
>>> 
>>>> b) once we read the properties second big question is how to pass them on
>> to the dispatcher in question i.e CommandAwareRpcDispatacher. There are two
>> choices here:
>>>> 1- We change the method signature of invokeRemoteCommands and pass on
>> these two params. This choice involves making up the calling stack in the
>> classes that invoke this method  namele JGroupsTransport and possible up the
>> calling stream.
>>>> 2- Another option is to set it on the ResponseFilter which is passed to
>> CommandAwareRpcDispatcher.
>>> 
>>> I'm not sure the CARD needs to be aware of the staggering. I'd think it is
>> the responsibility of the caller (DistributionInterceptor) to orchestrate
>> staggering..
>>> 
>>>> 
>>>> Also, would the changes in configuration would require making a change in
>> XSD schema file?
>>>> 
>>>> Thanks!
>>>> Hammad
>>>> 
>>>> 
>>>> `
>>> 
>>> Cheers,
>>> --
>>> Mircea Markus
>>> Infinispan lead (www.infinispan.org)
>>> 
>>> 
>>> 
>>> 
>> 
>> Cheers,
>> --
>> Mircea Markus
>> Infinispan lead (www.infinispan.org)
>> 
>> 
>> 
>> 
>> 
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Cheers,
-- 
Mircea Markus
Infinispan lead (www.infinispan.org)