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Posted to users@trafficserver.apache.org by Scott Harris <sc...@harrisnet.id.au> on 2013/09/05 04:12:29 UTC
Purpose of proxy.config.http.cache.cluster_cache_local
Can someone explain the purpose of the new feature and option :
proxy.config.http.cache.cluster_cache_local
I was hoping this allowed me to run in cluster mode and if I made a request
to a member that does not have it stored locally (but was stored on another
member) it would retrieve it from another member and then cache locally.
Subsequent requests could then be served from cache from 2 cache members.
>From testing if an object is stored on a member in the cluster and you hit
a member that does not have it stored it retrieves from the origin server.
I may be missing something but what is the point of running in full cluster
mode with proxy.config.http.cache.cluster_cache_local set to 1?
Re: Purpose of proxy.config.http.cache.cluster_cache_local
Posted by Scott Harris <sc...@harrisnet.id.au>.
I will run my test again on monday but my testing is showing the opposite.
I have no rules at all in cache.config but all my test cases would result
in cache to local.
On 07/09/2013 2:58 AM, "Yongming Zhao" <mi...@gmail.com> wrote:
> yes, it is default to cluster mode. and only the cache.config rules can
> specify the urls to cache in local.
>
>
>
> 在 2013-9-6，上午6:27，Scott Harris <sc...@harrisnet.id.au> 写道：
>
> no problem i will submit a feature request now.
>
> Just a question on how its currently implemented, I have set
> proxy.config.http.cache.cluster_cache_local=1 but not added any entry to
> cache.config with the cluster-cache-local directive, should all my
> requests default to cache local mode? This seems backwards to me, I would
> assume the default is work in normal cluster mode and only cache local for
> any matching rules in cache.config. Since I have no rules for cache local
> then all my requests should just work in cluster mode.
>
>
> On Thu, Sep 5, 2013 at 11:32 PM, Yongming Zhao <mi...@gmail.com> wrote:
>
>> hmm, I am sorry to tell you that we don't have what your want now. the
>> current proxy.config.http.cache.cluster_cache_local is a directive to
>> enable the cluster-cache-local directive. the you can set for example:
>> dest_host=127.0.0.1 scheme=http action=cluster-cache-local
>> in cache.config
>>
>> you will get a system with mostly a cluster cache, and some of the
>> content controlled in cache.config to be round robin. we think if someone
>> want a cluster env, he will put mostly of the content cached in the cluster
>> wide.
>>
>> the feature you need is really nice if we can implement it. please file a
>> jira new feature request for that.
>>
>> thanks
>>
>>
>> 在 2013-9-5，上午10:12，Scott Harris <sc...@harrisnet.id.au> 写道：
>>
>> Can someone explain the purpose of the new feature and option :
>> proxy.config.http.cache.cluster_cache_local
>>
>>
>> I was hoping this allowed me to run in cluster mode and if I made a
>> request to a member that does not have it stored locally (but was stored on
>> another member) it would retrieve it from another member and then cache
>> locally. Subsequent requests could then be served from cache from 2 cache
>> members.
>>
>>
>> From testing if an object is stored on a member in the cluster and you
>> hit a member that does not have it stored it retrieves from the origin
>> server.
>>
>>
>> I may be missing something but what is the point of running in full
>> cluster mode with proxy.config.http.cache.cluster_cache_local set to 1?
>>
>>
>>
>
>
Re: Purpose of proxy.config.http.cache.cluster_cache_local
Posted by Yongming Zhao <mi...@gmail.com>.
yes, it is default to cluster mode. and only the cache.config rules can specify the urls to cache in local.
在 2013-9-6，上午6:27，Scott Harris <sc...@harrisnet.id.au> 写道：
> no problem i will submit a feature request now.
>
> Just a question on how its currently implemented, I have set proxy.config.http.cache.cluster_cache_local=1 but not added any entry to cache.config with the cluster-cache-local directive, should all my requests default to cache local mode? This seems backwards to me, I would assume the default is work in normal cluster mode and only cache local for any matching rules in cache.config. Since I have no rules for cache local then all my requests should just work in cluster mode.
>
>
> On Thu, Sep 5, 2013 at 11:32 PM, Yongming Zhao <mi...@gmail.com> wrote:
> hmm, I am sorry to tell you that we don't have what your want now. the current proxy.config.http.cache.cluster_cache_local is a directive to enable the cluster-cache-local directive. the you can set for example:
> dest_host=127.0.0.1 scheme=http action=cluster-cache-local
> in cache.config
>
> you will get a system with mostly a cluster cache, and some of the content controlled in cache.config to be round robin. we think if someone want a cluster env, he will put mostly of the content cached in the cluster wide.
>
> the feature you need is really nice if we can implement it. please file a jira new feature request for that.
>
> thanks
>
>
> 在 2013-9-5，上午10:12，Scott Harris <sc...@harrisnet.id.au> 写道：
>
>> Can someone explain the purpose of the new feature and option : proxy.config.http.cache.cluster_cache_local
>>
>>
>> I was hoping this allowed me to run in cluster mode and if I made a request to a member that does not have it stored locally (but was stored on another member) it would retrieve it from another member and then cache locally. Subsequent requests could then be served from cache from 2 cache members.
>>
>>
>> From testing if an object is stored on a member in the cluster and you hit a member that does not have it stored it retrieves from the origin server.
>>
>>
>> I may be missing something but what is the point of running in full cluster mode with proxy.config.http.cache.cluster_cache_local set to 1?
>>
>
>
Re: Purpose of proxy.config.http.cache.cluster_cache_local
Posted by Scott Harris <sc...@harrisnet.id.au>.
no problem i will submit a feature request now.
Just a question on how its currently implemented, I have set
proxy.config.http.cache.cluster_cache_local=1 but not added any entry to
cache.config with the cluster-cache-local directive, should all my
requests default to cache local mode? This seems backwards to me, I would
assume the default is work in normal cluster mode and only cache local for
any matching rules in cache.config. Since I have no rules for cache local
then all my requests should just work in cluster mode.
On Thu, Sep 5, 2013 at 11:32 PM, Yongming Zhao <mi...@gmail.com> wrote:
> hmm, I am sorry to tell you that we don't have what your want now. the
> current proxy.config.http.cache.cluster_cache_local is a directive to
> enable the cluster-cache-local directive. the you can set for example:
> dest_host=127.0.0.1 scheme=http action=cluster-cache-local
> in cache.config
>
> you will get a system with mostly a cluster cache, and some of the content
> controlled in cache.config to be round robin. we think if someone want a
> cluster env, he will put mostly of the content cached in the cluster wide.
>
> the feature you need is really nice if we can implement it. please file a
> jira new feature request for that.
>
> thanks
>
>
> 在 2013-9-5，上午10:12，Scott Harris <sc...@harrisnet.id.au> 写道：
>
> Can someone explain the purpose of the new feature and option :
> proxy.config.http.cache.cluster_cache_local
>
>
> I was hoping this allowed me to run in cluster mode and if I made a
> request to a member that does not have it stored locally (but was stored on
> another member) it would retrieve it from another member and then cache
> locally. Subsequent requests could then be served from cache from 2 cache
> members.
>
>
> From testing if an object is stored on a member in the cluster and you hit
> a member that does not have it stored it retrieves from the origin server.
>
>
> I may be missing something but what is the point of running in full
> cluster mode with proxy.config.http.cache.cluster_cache_local set to 1?
>
>
>
Re: Purpose of proxy.config.http.cache.cluster_cache_local
Posted by Scott Harris <sc...@harrisnet.id.au>.
I have submitted an improvement issue for this :
https://issues.apache.org/jira/browse/TS-2184
On Thu, Sep 5, 2013 at 11:47 PM, Leif Hedstrom <zw...@apache.org> wrote:
> On Sep 5, 2013, at 7:32 AM, Yongming Zhao <mi...@gmail.com> wrote:
>
> hmm, I am sorry to tell you that we don't have what your want now. the
> current proxy.config.http.cache.cluster_cache_local is a directive to
> enable the cluster-cache-local directive. the you can set for example:
> dest_host=127.0.0.1 scheme=http action=cluster-cache-local
> in cache.config
>
>
> I never looked at this feature. Does this imply that content which is set
> to be cluster-cache-local will all go to origin for fetching? If so, yeah,
> that sounds like an important improvement to allow it to use the local
> cache members for fetching instead of origin.
>
> Assuming this is the case, maybe cache parenting can help here ? Depending
> on the size of your cluster, maybe you can set them up as parents. A wee
> bit tricky configuration, and risk of loops for sure, but it's a thought.
>
> -- Leif
>
>
Re: Purpose of proxy.config.http.cache.cluster_cache_local
Posted by Leif Hedstrom <zw...@apache.org>.
On Sep 5, 2013, at 7:32 AM, Yongming Zhao <mi...@gmail.com> wrote:
> hmm, I am sorry to tell you that we don't have what your want now. the current proxy.config.http.cache.cluster_cache_local is a directive to enable the cluster-cache-local directive. the you can set for example:
> dest_host=127.0.0.1 scheme=http action=cluster-cache-local
> in cache.config
I never looked at this feature. Does this imply that content which is set to be cluster-cache-local will all go to origin for fetching? If so, yeah, that sounds like an important improvement to allow it to use the local cache members for fetching instead of origin.
Assuming this is the case, maybe cache parenting can help here ? Depending on the size of your cluster, maybe you can set them up as parents. A wee bit tricky configuration, and risk of loops for sure, but it's a thought.
-- Leif
Re: Purpose of proxy.config.http.cache.cluster_cache_local
Posted by Yongming Zhao <mi...@gmail.com>.
hmm, I am sorry to tell you that we don't have what your want now. the current proxy.config.http.cache.cluster_cache_local is a directive to enable the cluster-cache-local directive. the you can set for example:
dest_host=127.0.0.1 scheme=http action=cluster-cache-local
in cache.config
you will get a system with mostly a cluster cache, and some of the content controlled in cache.config to be round robin. we think if someone want a cluster env, he will put mostly of the content cached in the cluster wide.
the feature you need is really nice if we can implement it. please file a jira new feature request for that.
thanks
在 2013-9-5，上午10:12，Scott Harris <sc...@harrisnet.id.au> 写道：
> Can someone explain the purpose of the new feature and option : proxy.config.http.cache.cluster_cache_local
>
>
> I was hoping this allowed me to run in cluster mode and if I made a request to a member that does not have it stored locally (but was stored on another member) it would retrieve it from another member and then cache locally. Subsequent requests could then be served from cache from 2 cache members.
>
>
> From testing if an object is stored on a member in the cluster and you hit a member that does not have it stored it retrieves from the origin server.
>
>
> I may be missing something but what is the point of running in full cluster mode with proxy.config.http.cache.cluster_cache_local set to 1?
>