On 07/14/2017 10:22 PM, Andrew Hanushevsky wrote:
> Hi Adrian,
Hi!
> Yes, you if-else synopsis is correct; though it's a little had to
> capture that linger is temporary (i.e. it only applies the specified
> number of times).
ok, understood, thanks a lot for clarification!!
Adrian
>
> Andy
>
> On Fri, 14 Jul 2017, Adrian Sevcenco wrote:
>
>> On 07/13/2017 12:27 AM, Andrew Hanushevsky wrote:
>>> Hi Adrian,
>> Hi!
>>
>>> Let's say you want to create a file and server x was selected. Then
>>> you want to create another file and the cms looks and says well, all
>>> things are roughly equal who should I select? If linger is set to 1
>>> then server x will be selected. If linger is zero or server x was
>>> already selected twice in a row, then another server would be
>>> selected. The cms.sche has no impact on this behaviour.
>> i see! so,
>> if cms.sched priorities are equal for all servers {
>> if (linger)
>> { will keep the previous use server for writing }
>> else
>> { choose another server }
>> else
>> { chose highest priority }
>>
>> did i understood correctly?
>>
>>> We put this in way back and no one uses it as far as I know because
>>> it's really hard to predict the space allocation pattern and people
>>> generally don't like adding extra entropy to the decision making.
>> :)) yes, i can understand that :))
>>
>> Thank you!
>> Adrian
>>
>>
>>
>>>
>>> Andy
>>>
>>> On Wed, 12 Jul 2017, Adrian Sevcenco wrote:
>>>
>>>> Hi! It is not clear to me what does cms.space linger do ...
>>>> the documentation says :
>>>> "The number of times a server may be reselected without an
>>>> intervening server being selected for allocation. The default is
>>>> zero (0)."
>>>>
>>>> but what is "an intervening server" ?
>>>>
>>>> also, how this interact with the scheduling done by cms.sched?
>>>>
>>>> Thank you!
>>>> Adrian
>>>>
>>>>
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>>>
>>
>>
>> --
>> ----------------------------------------------
>> Adrian Sevcenco, Ph.D. |
>> Institute of Space Science - ISS, Romania |
>> adrian.sevcenco at {cern.ch,spacescience.ro} |
>> ----------------------------------------------
>>
>>
>
--
----------------------------------------------
Adrian Sevcenco, Ph.D. |
Institute of Space Science - ISS, Romania |
adrian.sevcenco at {cern.ch,spacescience.ro} |
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