<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><br><div><div>On Nov 27, 2013, at 20:33 , Richard Graham <<a href="mailto:richardg@mellanox.com">richardg@mellanox.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple" style="font-family: CourierNewPSMT; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="WordSection1" style="page: WordSection1;"><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;">I am thinking about the next step, and have some questions on the semantics of MPI_Comm_revoke()</div></div></div></blockquote><div><br></div><div>What next step are you referring to?</div><br><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple" style="font-family: CourierNewPSMT; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="WordSection1" style="page: WordSection1;"><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p></o:p></div><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in;"><span>-<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> <span class="Apple-converted-space"> </span></span></span><span dir="LTR"></span>When the routine returns, can the communicator ever be used again ? If I remember correctly, the communicator is available for point-to-point traffic, but not collective traffic – is this correct ?</div></div></div></blockquote><div><br></div><div>A revoked communicator is unable to support any communication (point-to-point or collective) with the exception of agree and shrink. If this is not clear enough in the current version of the proposal we should definitively address it.</div><br><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple" style="font-family: CourierNewPSMT; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="WordSection1" style="page: WordSection1;"><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in;"><o:p></o:p></div><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in;"><span>-<span style="font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-family: 'Times New Roman';"> <span class="Apple-converted-space"> </span></span></span><span dir="LTR"></span>Looking forward, if one wants to restart the failed ranks (let’s assume we add support for this), what can be assume about the “repaired” communicator ? What can’t I assume about this communicator ?</div></div></div></blockquote><div><br></div><div>What you can assume depends on what is the meaning of “repaired”. Already today one can spawn new processes and reconstruct a communicator identical to the original communicator before any fault. This can be done using MPI dynamics together with the agreement available in the ULFM proposal.</div><div><br></div><div> George.</div><div><br></div><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple" style="font-family: CourierNewPSMT; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="WordSection1" style="page: WordSection1;"><div style="margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: -0.25in;"><o:p></o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;">Rich<o:p></o:p></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;"><o:p> </o:p></div></div>_______________________________________________<br>mpiwg-ft mailing list<br><a href="mailto:mpiwg-ft@lists.mpi-forum.org" style="color: purple; text-decoration: underline;">mpiwg-ft@lists.mpi-forum.org</a><br><a href="http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-ft" style="color: purple; text-decoration: underline;">http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-ft</a></div></blockquote></div><br></body></html>