Hi Sam,
Yes the current implementation is local. But I would address in my
talk that it's a test simulating a transparent cache between WNs and a
remote SE. As the performance evaluation focuses on the cached
content, so wether the backend SE is remote or not is not vital in the
study. And XCache should be more useful to cache remote data for
future diskless sites.
Best Regards,
Teng
Quoting Sam Skipsey <[log in to unmask]> on Thu, 5 Jul 2018
14:20:00 +0100:
> Hi Teng,
>
> Yes, it's opportunistic because you're just caching "stuff which is being
> transferred right now, in case it is useful later".
> In the case of the testing you're presenting, the cache is also local -
> because it is between your local SE and your local compute. (I know the
> plan is to make it more remote, but IIRC, your actual implementation
> currently doesn't proxy outside ECDF?)
>
>
> Thanks for the better slide.
> Sam
>
> On Thu, Jul 5, 2018 at 2:16 PM Teng Li <[log in to unmask]> wrote:
>
>> Hi Sam,
>>
>> Thanks. Just one comment on slide 11.
>>
>> Maybe I've understood the term "local opportunistic cache" wrong but I
>> think XRootD proxy cache is mostly useful between local WNs and remote
>> SEs, which is what we are simulating and planning to address in my
>> following talk. So I would like to say "XrootD proxy cache between
>> remote SE and worker nodes".
>>
>> Also the plot is little blurry. I've attached a clearer one.
>>
>> Cheers,
>> Teng
>>
>>
>>
>> Quoting Sam Skipsey <[log in to unmask]> on
>> Thu, 5 Jul 2018 13:33:23 +0100:
>>
>> > As promised, here's a draft of the CHEP Tier 2 caching talk.
>> >
>> > All comments gratefully received (the frontspiece needs me to add credits
>> > anyway, so if you comment you get a credit as well)...
>> >
>> > Sam
>> >
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>>
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