<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Thanks Jesus, Dave and Sara <div>I read the minutes, unfortunately I was not able to attend.</div><div>I would like to mention that Claudio and I organised a BoF at ADASS on sciplatforms.</div><div>It was accepted a couple of days ago.</div><div>Maybe we could profit of the BoF (and eventually on one session on interop) to continue the discussion in person in particular for what regards the evolution of the executionplanner :-)</div><div>Regards</div><div>G.</div><div> <br><div><br><div><br><blockquote type="cite"><div>On 21 Sep 2023, at 12:25, Salgado, Jesus <jesus.salgado@skao.int> wrote:</div><br class="Apple-interchange-newline"><div><meta charset="UTF-8"><div class="WordSection1" style="page: WordSection1; caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Dear all,<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Thanks for the big attendance and the productive discussion during yesterday’s GWS meeting on Federated Execution across astronomical science platforms kick-off meeting.<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Minutes of the meeting are at:<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><a href="https://wiki.ivoa.net/twiki/bin/view/IVOA/GWSTelecon20230920" style="color: rgb(5, 99, 193); text-decoration: underline;">https://wiki.ivoa.net/twiki/bin/view/IVOA/GWSTelecon20230920</a><o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">It was presented a summary of the issues to be address and Dave Morris presented the status of the Execution Planner, the first standard we want to promote within the team.<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">As this was a kick-off session, we have identified some points that could be further discussed in the mailing list or during next interop session in Tucson.<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><ul type="disc" style="margin-bottom: 0cm; margin-top: 0cm;"><li class="MsoNormal" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Are we replicating work already solved by the Grid community?<o:p></o:p></li></ul><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Our initial answer is that the grid (or later cloud communities) has some agreed standards that we need to study to introduce concepts but that are not usually software stack agnostics. In the same way we defined UWS (what is a job scheduler when many job schedulers are present in many other contexts), the abstraction layer of the Execution Planner could be implemented with different software stacks below. In any case, of course we need to take attention to other standard ways to solve these problems.<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><ul type="disc" style="margin-bottom: 0cm; margin-top: 0cm;"><li class="MsoNormal" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Status of Execution Planner and missing points?<o:p></o:p></li></ul><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Note is quite complete. It must be addressed the data model to characterise capabilities of the platforms and characterisation of the workflows (in the general sense). This data model could be part of the Execution Planner standard (not a separate document) and, also, it should address data location (this is an open issue)<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><ul type="disc" style="margin-bottom: 0cm; margin-top: 0cm;"><li class="MsoNormal" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Why not to create a layer on top of orchestrators? (Most of science platforms already have, e.g. a Kubernetes cluster)<o:p></o:p></li></ul><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Although it is true that some technologies are quite standard for most of the science platforms, technologies could change, and older platforms could have different set-ups. This is why IVOA protocols are usually software stack agnostics so they could be implemented by all. In any case, it is important to know the level of heterogeneity of the different partners to identify if some things could be simplified assuming that compatible technologies.<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><ul type="disc" style="margin-bottom: 0cm; margin-top: 0cm;"><li class="MsoNormal" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Could IVOA endorse or accept S3 as a data transfer protocol?<o:p></o:p></li></ul><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Not clear answer. Interesting to be discussed in the mailing list.<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><ul type="disc" style="margin-bottom: 0cm; margin-top: 0cm;"><li class="MsoNormal" style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Next steps?<o:p></o:p></li></ul><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">The more important step is to identify who is willing to help on the prototyping as, in this particular case, the prototyping will clarify a lot about possible missing points on the execution planner definition.<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;">Best Regards,<br>Jesus Salgado, Sara Bertocco and Dave Morris<o:p></o:p></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div><div><table class="MsoNormalTable" border="0" cellspacing="0" cellpadding="0" width="600" style="width: 450pt;"><tbody><tr><td colspan="3" valign="bottom" style="padding: 3.75pt;"><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><span><span id="cid:image001.jpg@01D9EC7E.41D4F490"><image001.jpg></span><o:p></o:p></span></div></td></tr><tr style="height: 114pt;"><td valign="top" style="padding: 3.75pt; height: 114pt;"><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><span><span id="cid:image002.jpg@01D9EC7E.41D4F490"><image002.jpg></span><o:p></o:p></span></div></td><td valign="top" style="padding: 3.75pt; height: 114pt;"><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; text-align: center;"><span><span id="cid:image003.jpg@01D9EC7E.41D4F490"><image003.jpg></span><o:p></o:p></span></div></td><td width="375" valign="top" style="width: 281.25pt; padding: 3.75pt; height: 114pt;"><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><span lang="ES" style="color: rgb(7, 0, 104);">Jesús Salgado</span><span lang="ES" style="font-size: 9pt; font-family: Verdana, sans-serif;"> <br><span style="color: rgb(231, 0, 104);">SKA Regional Centre Architect</span></span><span lang="ES"><o:p></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-size: 7.5pt; font-family: Verdana, sans-serif; color: rgb(91, 103, 112);"><a href="mailto:jesus.salgado@skao.int" style="color: rgb(5, 99, 193); text-decoration: underline;"><span lang="ES" style="color: rgb(5, 99, 193);">jesus.salgado@skao.int</span></a></span><span lang="ES" style="font-size: 7.5pt; font-family: Verdana, sans-serif; color: rgb(91, 103, 112);"><br></span><span style="font-size: 7.5pt; font-family: Verdana, sans-serif; color: rgb(91, 103, 112);"><a href="https://www.skao.int/" style="color: rgb(5, 99, 193); text-decoration: underline;"><span lang="ES" style="color: rgb(91, 103, 112);">www.skao.int</span></a></span><span lang="ES"><o:p></o:p></span></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-size: 7.5pt; font-family: Verdana, sans-serif; color: rgb(91, 103, 112);">SKA Observatory<br>Jodrell Bank, Lower Withington,<br>Macclesfield, SK11 9FT, UK</span><span><o:p></o:p></span></div></td></tr></tbody></table></div><div style="margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div></div><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><font size="1.5px" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">The SKA Observatory is an inter-governmental organisation and the successor of SKA Organisation, a private limited company by guarantee registered in England and Wales with registered number 07881918, with a registered office of Jodrell Bank, Lower Withington, Macclesfield, Cheshire, England, SK11 9FT.<span class="Apple-converted-space"> </span><br><br>This message is intended solely for the addressee and may contain confidential information. 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