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From Ming Zhang <blackmagic02...@gmail.com>
Subject Re: qmf protocol
Date Mon, 12 Oct 2009 23:05:18 GMT
ic. sounds much reasonable. thanks for the explanation.

the more i look at it, the more i think qmf is a right choice. now
just need to find more complete examples.

Ming


On Mon, Oct 12, 2009 at 5:10 PM, Carl Trieloff <cctrieloff@redhat.com> wrote:
>
> if the mgnt interval is 10 seconds for the agent, then the value can change
> n times, and only 1 update will
> be sent at the 10 second mark.
>
> if you care about hi/low etc, these are data types in QMF, that can give you
> current/hi/low value
> etc for the inteval.
>
> Alternatively you can 'pull' the data you care about when you care about it
> and not subscribe to the auto
> publish.
>
> Carl.
>
>
> Ming Zhang wrote:
>>
>> ok. so if only changed value is sent out, if agent code change value
>> 1, then value 2, will 2 messages sent out? that is still expensive? or
>> need to have a explicitly push action so multi change will be combined
>> in one message, which supposed to be more efficient? thanks.
>>
>>
>>
>> Ming
>>
>>
>> On Mon, Oct 12, 2009 at 4:59 PM, Carl Trieloff <cctrieloff@redhat.com>
>> wrote:
>>
>>>
>>> Ming Zhang wrote:
>>>
>>>>
>>>> Hi All
>>>>
>>>> Read this http://qpid.apache.org/qmf-protocol.html and have a question
>>>> about it.
>>>>
>>>> "This message contains a content record. Content records contain the
>>>> values of all properties or statistics in an object. Such records are
>>>> broadcast on a periodic interval if 1) a change has been made in the
>>>> value of one of the elements, or 2) if a new management client has
>>>> bound a queue to the management exchange."
>>>>
>>>> If a full content record is sent for any value change, this sounds
>>>> very expensive. Why not only send up the changed value?
>>>>
>>>> Did I misunderstand something?
>>>>
>>>
>>> only value that have changed after the initial broadcast or send on an
>>> aggregated basis on the mgnt interval
>>>
>>> Carl.
>>>
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>>>
>>>
>>
>> ---------------------------------------------------------------------
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>> Project:      http://qpid.apache.org
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>>
>>
>
>

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