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Posted to dev@stratos.apache.org by Chamila De Alwis <ch...@wso2.com> on 2014/11/19 15:41:38 UTC
Determining the "Active" status of a cluster
Hi,
Given the list of members in a cluster, we can determine the number of
active members and their partition ids. This in turn can be used to
determine the min count of each partition.
Can it be said that the particular cluster is "Active", if the number of
"Active" members are equal to the sum of the min counts of the partitions?
Or should it be that each partition should have a number of "Active"
members equal to the min count of each?
Regards,
Chamila de Alwis
Software Engineer | WSO2 | +94772207163
Blog: code.chamiladealwis.com
Re: Determining the "Active" status of a cluster
Posted by Udara Liyanage <ud...@wso2.com>.
Hi Sajith,
>From UI side it considers active when there is atleast one active member.
CLI has implemented it in a different manner.
On Thu, Nov 20, 2014 at 12:03 PM, Sajith Kariyawasam <sa...@wso2.com>
wrote:
> Shouldn't we consider a cluster is active if there is "atleast one" active
> member?
>
> Even If a cluster is defined its min count as 3, it can serve the requests
> as soon as one instance gets activated, without waiting for other two
> instances.
> Our instance starting / activation process happens sequentially..
>
> On Wed, Nov 19, 2014 at 10:10 PM, Isuru Haththotuwa <is...@apache.org>
> wrote:
>
>>
>>
>> On Wed, Nov 19, 2014 at 8:54 PM, Udara Liyanage <ud...@wso2.com> wrote:
>>
>>>
>>>
>>>
>>>
>>> Touched, not typed. Erroneous words are a feature, not a typo.
>>> On Nov 19, 2014 8:13 PM, "Chamila De Alwis" <ch...@wso2.com> wrote:
>>> >
>>> > Hi,
>>> >
>>> > Given the list of members in a cluster, we can determine the number of
>>> active members and their partition ids. This in turn can be used to
>>> determine the min count of each partition.
>>> >
>>> > Can it be said that the particular cluster is "Active", if the number
>>> of "Active" members are equal to the sum of the min counts of the
>>> partitions?
>>> >
>>> > Or should it be that each partition should have a number of "Active"
>>> members equal to the min count of each?
>>> >
>>>
>>> This one is the correct way I guests.
>>>
>>> Just want to know when they are multiple partition do we create multiple
>>> clusters or one clusters?
>>>
>> Still its a single cluster. Min count is maintained for each partition.
>>
>>> > Regards,
>>> > Chamila de Alwis
>>> > Software Engineer | WSO2 | +94772207163
>>> > Blog: code.chamiladealwis.com
>>> >
>>> >
>>>
>>> --
>>> Thanks and Regards,
>>>
>>> Isuru H.
>>> +94 716 358 048* <http://wso2.com/>*
>>>
>>>
>>> * <http://wso2.com/>*
>>>
>>>
>>>
>
>
> --
> *Sajith Kariyawasam*
>
>
> *Committer and PMC member, Apache Stratos,WSO2 Inc., http://wso2.com
> <http://wso2.com>AMIE (SL)Mobile: +94772269575*
>
--
Udara Liyanage
Software Engineer
WSO2, Inc.: http://wso2.com
lean. enterprise. middleware
web: http://udaraliyanage.wordpress.com
phone: +94 71 443 6897
Re: Determining the "Active" status of a cluster
Posted by Sajith Kariyawasam <sa...@wso2.com>.
Shouldn't we consider a cluster is active if there is "atleast one" active
member?
Even If a cluster is defined its min count as 3, it can serve the requests
as soon as one instance gets activated, without waiting for other two
instances.
Our instance starting / activation process happens sequentially..
On Wed, Nov 19, 2014 at 10:10 PM, Isuru Haththotuwa <is...@apache.org>
wrote:
>
>
> On Wed, Nov 19, 2014 at 8:54 PM, Udara Liyanage <ud...@wso2.com> wrote:
>
>>
>>
>>
>>
>> Touched, not typed. Erroneous words are a feature, not a typo.
>> On Nov 19, 2014 8:13 PM, "Chamila De Alwis" <ch...@wso2.com> wrote:
>> >
>> > Hi,
>> >
>> > Given the list of members in a cluster, we can determine the number of
>> active members and their partition ids. This in turn can be used to
>> determine the min count of each partition.
>> >
>> > Can it be said that the particular cluster is "Active", if the number
>> of "Active" members are equal to the sum of the min counts of the
>> partitions?
>> >
>> > Or should it be that each partition should have a number of "Active"
>> members equal to the min count of each?
>> >
>>
>> This one is the correct way I guests.
>>
>> Just want to know when they are multiple partition do we create multiple
>> clusters or one clusters?
>>
> Still its a single cluster. Min count is maintained for each partition.
>
>> > Regards,
>> > Chamila de Alwis
>> > Software Engineer | WSO2 | +94772207163
>> > Blog: code.chamiladealwis.com
>> >
>> >
>>
>> --
>> Thanks and Regards,
>>
>> Isuru H.
>> +94 716 358 048* <http://wso2.com/>*
>>
>>
>> * <http://wso2.com/>*
>>
>>
>>
--
*Sajith Kariyawasam*
*Committer and PMC member, Apache Stratos,WSO2 Inc., http://wso2.com
<http://wso2.com>AMIE (SL)Mobile: +94772269575*
Re: Determining the "Active" status of a cluster
Posted by Isuru Haththotuwa <is...@apache.org>.
On Wed, Nov 19, 2014 at 8:54 PM, Udara Liyanage <ud...@wso2.com> wrote:
>
>
>
>
> Touched, not typed. Erroneous words are a feature, not a typo.
> On Nov 19, 2014 8:13 PM, "Chamila De Alwis" <ch...@wso2.com> wrote:
> >
> > Hi,
> >
> > Given the list of members in a cluster, we can determine the number of
> active members and their partition ids. This in turn can be used to
> determine the min count of each partition.
> >
> > Can it be said that the particular cluster is "Active", if the number of
> "Active" members are equal to the sum of the min counts of the partitions?
> >
> > Or should it be that each partition should have a number of "Active"
> members equal to the min count of each?
> >
>
> This one is the correct way I guests.
>
> Just want to know when they are multiple partition do we create multiple
> clusters or one clusters?
>
Still its a single cluster. Min count is maintained for each partition.
> > Regards,
> > Chamila de Alwis
> > Software Engineer | WSO2 | +94772207163
> > Blog: code.chamiladealwis.com
> >
> >
>
> --
> Thanks and Regards,
>
> Isuru H.
> +94 716 358 048* <http://wso2.com/>*
>
>
> * <http://wso2.com/>*
>
>
>
Re: Determining the "Active" status of a cluster
Posted by Udara Liyanage <ud...@wso2.com>.
Touched, not typed. Erroneous words are a feature, not a typo.
On Nov 19, 2014 8:13 PM, "Chamila De Alwis" <ch...@wso2.com> wrote:
>
> Hi,
>
> Given the list of members in a cluster, we can determine the number of
active members and their partition ids. This in turn can be used to
determine the min count of each partition.
>
> Can it be said that the particular cluster is "Active", if the number of
"Active" members are equal to the sum of the min counts of the partitions?
>
> Or should it be that each partition should have a number of "Active"
members equal to the min count of each?
>
This one is the correct way I guests.
Just want to know when they are multiple partition do we create multiple
clusters or one clusters?
> Regards,
> Chamila de Alwis
> Software Engineer | WSO2 | +94772207163
> Blog: code.chamiladealwis.com
>
>