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<div>Without getting into a whole lot of detail - The service is not based around the existing DMAPI interface. This service uses the Cluster Export Service (CES) nodes in GPFS 4.2 to perform the work. There is a process running on these nodes that’s configured
to use a cloud provider and it performs the data migration between cloud and GPFS. It can be done using an automated process or by manual policy migration.</div>
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<div>I’m not sure what level of technical detail I can share on the mailing list – if you reply to Rob Basham’s post on DeveloperWorks I’m sure he can fill in the lede lot detail you need.</div>
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<font face="Helvetica">Bob Oesterlin<br>
Sr Storage Engineer, Nuance HPC Grid<br>
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<span style="font-weight:bold">From: </span>"<a href="mailto:service@metamodul.com">service@metamodul.com</a>" <<a href="mailto:service@metamodul.com">service@metamodul.com</a>><br>
<span style="font-weight:bold">Date: </span>Friday, January 29, 2016 at 8:46 AM<br>
<span style="font-weight:bold">To: </span>Robert Oesterlin <<a href="mailto:Robert.Oesterlin@nuance.com">Robert.Oesterlin@nuance.com</a>>, gpfsug main discussion list <<a href="mailto:gpfsug-discuss@spectrumscale.org">gpfsug-discuss@spectrumscale.org</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [gpfsug-discuss] IBM Spectrum Scale transparent cloud tiering<br>
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<div>Hi Robert,</div>
<div>i refered to your posting i assume ^_^</div>
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<div>Note the following is from what I know, Since i did not had any change to work</div>
<div>with GPFS in the last 2 years my knowledge will be outdated.</div>
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<div>The current GPFS tiering options depending on the DMAPI which i am not a big fan</div>
<div>since it had in the past some limitations,</div>
<div>In past i read some talking about "lightweight callbacks" - thats what i</div>
<div>remember as the name - which could hook into the stream of open or write process</div>
<div>( to/from a gpfs )</div>
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<div>Thus in case the new solution is still based on DMAPI no further info is</div>
<div>required. If not i would like to know a little bit more ... if possible,</div>
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<div>Cheers</div>
<div>Hajo</div>
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