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} |
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