Hi,
It's determined by (apprently undocumented) parameter pfc.flush
pfc.flush [blocks | bytes[kmg]]
The default is 2000 blocks.
At this point data files is fsynced, cinfo file is written/updated and also fsynced.
Cheers,
Matevz
On 2020-02-25 15:19, Andrew Hanushevsky wrote:
> Hi Nikolai,
>
> I'm sure Matevz can asnwer the question. However, I do want you to be aware that
> cinf files are considered private information. There is no public API defined
> for them (though monitoring information will be generated from them in the next
> major release). This means that they may change without warning and at any time.
>
> Andy
>
> On Tue, 25 Feb 2020, Nikolai Hartmann wrote:
>
>> Hi,
>>
>> We are using a script from Ilija to report file access statistics from
>> our xcache server:
>>
>> https://github.com/slateci/XCache/blob/master/cacheReporter/reporter.py
>>
>> This looks for cinfo files modified in the last hour and then in these
>> files looks for accesses within the last hour to report. The idea is
>> then to run this at least once an hour to report all file accesses
>> (minus the detail that only the last 20 will be reported if more than 20
>> accesses happened in the last hour).
>>
>> I'm currently trying to debug why i sometimes don't report anything
>> although i can see when dumping the cinfo files later that at these
>> times there should have been accesses.
>>
>> Are the cinfo files written immediately after file accesses or could it
>> be that they are written later, such that i miss accessed files with
>> this method?
>>
>> Thanks,
>>
>> Nikolai
>>
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