Re: Recommendations
"Wes Wagner" <[email protected]> Wed, 18 Jul 2007 09:22:45 -0700
| Newsgroups | gmane.linux.cluster.openmosix.general |
|---|---|
| Message-ID | <[email protected]> |
--===============1721364360== Content-Type: multipart/related; boundary="----=_Part_54853_3393828.1184775765762" ------=_Part_54853_3393828.1184775765762 Content-Type: multipart/alternative; boundary="----=_Part_54852_23775993.1184775765762" ------=_Part_54852_23775993.1184775765762 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline 2.4 is SMP safe... 2.6 is not currently listed as SMP safe - if 2.6 is SMP safe, I would be glad to know it because that is a major project facing us right now on multi-core nodes for running 2.6.22 -Wes On 7/18/07, Moshe Bar <[email protected]> wrote: > > Robert > > openMosix *is* SMP safe, and has been for the past 10 years or so. > > openMosix does not, however, support thread migration. We had it in the > past, and the performance is very slow because of true and false sharing > over the network. > > Moshe > > > On 7/18/07, pogson <[email protected]> wrote: > > > On Wed, 2007-18-07 at 07:24 -0700, Wes Wagner wrote: > > > > The other virtue of > > openmosix is the ability to PXE boot/CD boot random systems all over the > > network and borrow them, plus later gracefully shut them down. > > > > > > Last year I set up an LTSP system that used multiple servers. OpenMosix > > showed promise with a very flexible clustering solution. I was wishing > > 2.6/Opteron/MigSHM were available. As it turned out, I used static > > allocation which would be painful whenever I needed to do any work on a > > server. Fortunately uptime was good. > > > > I often work in computer labs where 24 PCs sit idling with a few users > > clicking and gawking. OM can put them to work while SMP cannot. > > > > The question about the need for OpenMosix vs SMP is interesting. In the > > universe there must be quite a mix of needs. Some mixes worked very well > > with OM 2.4 . Perhaps the obstacle is "not SMP-safe". As many CPUs are > > SMP, it would be very inefficient if the logic of OM could not be made to > > work with SMP. Why is OM not SMP-safe if most of OM is now to be in > > userland? > > > > There are hundreds of millions of PCs. I would be very surprised if > > there were only a few thousand OM clusters out there. Sourceforge shows > > 384,668 downloads and there are several distros incorporating OM > > technology. I am sure activity would increase if 2.6 could be finished. > > > > Maybe it is time I learned C and kernel-hacking. If only I weren't so > > old... [image: ;-)] > > > > Robert Pogson > > > > -- > > A problem is an opportunity. > > > > > > > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by DB2 Express > > Download DB2 Express C - the FREE version of DB2 express and take > > control of your XML. No limits. Just data. Click to get it now. > > http://sourceforge.net/powerbar/db2/ > > _______________________________________________ > > openMosix-general mailing list > > openMosix-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org > > https://lists.sourceforge.net/lists/listinfo/openmosix-general > > > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > openMosix-general mailing list > openMosix-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org > https://lists.sourceforge.net/lists/listinfo/openmosix-general > > -- Wes Wagner Join a libertarian network of person-to-person lending on Prosper: http://www.prosper.com/groups/group_home.aspx?group_short_name=freelibertarians&referrer=AiriusTorpora&utm_source=referrer-AiriusTorpora&utm_medium=referral-link&utm_content=join_my_group-160x33&utm_campaign=referrals-group ------=_Part_54852_23775993.1184775765762 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline 2.4 is SMP safe... 2.6 is not currently listed as SMP safe - if 2.6 is SMP safe, I would be glad to know it because that is a major project facing us right now on multi-core nodes for running 2.6.22<br><br>-Wes<br><br><br> <div><span class="gmail_quote">On 7/18/07, <b class="gmail_sendername">Moshe Bar</b> <<a href="mailto:[email protected]">[email protected]</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Robert<br><br>openMosix *is* SMP safe, and has been for the past 10 years or so. <br><br>openMosix does not, however, support thread migration. We had it in the past, and the performance is very slow because of true and false sharing over the network. <br><span class="sg"><br>Moshe<br><br><br></span><div><div><span class="e" id="q_113da220773438b8_3"><span class="gmail_quote">On 7/18/07, <b class="gmail_sendername">pogson</b> <<a href="mailto:[email protected]" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> [email protected]</a>> wrote:</span></span></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div><div><span class="e" id="q_113da220773438b8_5"><span> On Wed, 2007-18-07 at 07:24 -0700, Wes Wagner wrote:<br> <blockquote type="CITE"> <tt><font color="#000000">The other virtue of</font></tt><br> <tt><font color="#000000">openmosix is the ability to PXE boot/CD boot random systems all over the</font></tt><br> <tt><font color="#000000">network and borrow them, plus later gracefully shut them down.</font></tt><font color="#000000"> </font><br> </blockquote></span> <br> Last year I set up an LTSP system that used multiple servers. OpenMosix showed promise with a very flexible clustering solution. I was wishing 2.6/Opteron/MigSHM were available. As it turned out, I used static allocation which would be painful whenever I needed to do any work on a server. Fortunately uptime was good. <br> <br> I often work in computer labs where 24 PCs sit idling with a few users clicking and gawking. OM can put them to work while SMP cannot.<br> <br> The question about the need for OpenMosix vs SMP is interesting. In the universe there must be quite a mix of needs. Some mixes worked very well with OM 2.4 . Perhaps the obstacle is "not SMP-safe". As many CPUs are SMP, it would be very inefficient if the logic of OM could not be made to work with SMP. Why is OM not SMP-safe if most of OM is now to be in userland? <br> <br> There are hundreds of millions of PCs. I would be very surprised if there were only a few thousand OM clusters out there. Sourceforge shows 384,668 downloads and there are several distros incorporating OM technology. I am sure activity would increase if 2.6 could be finished.<br> <br> Maybe it is time I learned C and kernel-hacking. If only I weren't so old... <img src="cid:1184772184.10402.104.camel@Beast" alt=";-)" align="middle" border="0"><br> <br> Robert Pogson<br> </span></div><div><span id="q_113da220773438b8_7" class="e"> </span></div><table cellpadding="0" cellspacing="0" width="100%"> <tbody><tr><td> <pre>-- <br>A problem is an opportunity.<br></pre> <br></td> </tr> </tbody></table> </div> <br>-------------------------------------------------------------------------<span class="q"><br>This SF.net email is sponsored by DB2 Express<br>Download DB2 Express C - the FREE version of DB2 express and take<br>control of your XML. No limits. Just data. Click to get it now. <br><a href="http://sourceforge.net/powerbar/db2/" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://sourceforge.net/powerbar/db2/</a><br>_______________________________________________<br>openMosix-general mailing list <br><a href="mailto:openMosix-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">openMosix-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org</a><br><a href="https://lists.sourceforge.net/lists/listinfo/openmosix-general" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> https://lists.sourceforge.net/lists/listinfo/openmosix-general</a><br><br></span></blockquote></div><br> <br>-------------------------------------------------------------------------<br>This SF.net email is sponsored by DB2 Express<br>Download DB2 Express C - the FREE version of DB2 express and take<br>control of your XML. No limits. Just data. Click to get it now. <br><a onclick="return top.js.OpenExtLink(window,event,this)" href="http://sourceforge.net/powerbar/db2/" target="_blank">http://sourceforge.net/powerbar/db2/</a><br>_______________________________________________<br>openMosix-general mailing list <br><a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:openMosix-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org">openMosix-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org</a><br><a onclick="return top.js.OpenExtLink(window,event,this)" href="https://lists.sourceforge.net/lists/listinfo/openmosix-general" target="_blank"> https://lists.sourceforge.net/lists/listinfo/openmosix-general</a><br><br></blockquote></div><br><br clear="all"><br>-- <br>Wes Wagner<br><br>Join a libertarian network of person-to-person lending on Prosper:<br> <br><a href="http://www.prosper.com/groups/group_home.aspx?group_short_name=freelibertarians&referrer=AiriusTorpora&utm_source=referrer-AiriusTorpora&utm_medium=referral-link&utm_content=join_my_group-160x33&utm_campaign=referrals-group"> http://www.prosper.com/groups/group_home.aspx?group_short_name=freelibertarians&referrer=AiriusTorpora&utm_source=referrer-AiriusTorpora&utm_medium=referral-link&utm_content=join_my_group-160x33&utm_campaign=referrals-group </a> ------=_Part_54852_23775993.1184775765762-- ------=_Part_54853_3393828.1184775765762 Content-Type: image/png; name=smiley-4.png Content-Transfer-Encoding: base64 Content-ID: <1184772184.10402.104.camel@Beast> X-Attachment-Id: 0.0.1 Content-Disposition: inline; filename="smiley-4.png" iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAC/UlEQVR42n2Tf2iUdRzHX9/v8zy3 u91ulnO5pXGXUUsK1yIY9ke0CDQiodbQKCOnNieaIkKI/yRhf0QgCeEqViKUYgUOnTE9G5WtjlqB TV1bsnl0tV93u93ux3PP93meb/8sKBNf8P7jw/v9+fz1/sD/iQI7gB7AWdApoGPB+w/ihvnI/bHK bfu2NLF2zUrMcAw8G2d+mIGBi+w/nGE46XQBnTc7cOFAZ+MTO1/bgDBCuIVxnPwIQhgYwXqMQA2q MMahd+O8fWLmAvAkgLGw/MGbOx55fueuF/FKKVRxHF/NIaQFgO+kcQtjgGZ1cwyjOLXiuyG7DuiV QLSx4fat2zvX4dmTeOVphDCwvUqkWcVk2mfDnkGEtPCdLEJabH95CfctN7YBUQk83XNoMUJaTE+M cuT476x9pZfmZ3sI1D7D8fMeP/2a4a3uGaqWt6Ly1zBDdbzadhvAowLomrn0eocqXMeoqCVU+xga E2mYlKb6sSINtG58gzOnTzGf/BR7+hukWUni52u07p04aS5bdudmAN/NURZ3oSe+RBhhhLTQGsqZ BKd7Pic3fhSVGwLAtaeoX2IAPGem02kQJrP5EHJRHYb0CHhZtG+CdtFeiezIO2h3Hu17OI6Dqxzy RR8AadvlXu0WqDSm6O87xkzWx6p+AF/l8N08vmejvRLaV7jKJjNnEwwvJTXtASQk0FecOEsoUs/6 9RuJx8+RGOgjuLgZK7ISzBo8X9L/w1+07RnmnqZ2RpNlrg7lAU4IILrq3sh437GnMCruIFD9IL8M fsvQpUE+OiO4fGWYRVUGhw+2sablIZJXPiN+cYwPT2b4LaUb/mli94Etsfatm5pwi0kisU1Y4RUI IfHsSTQalR/lcuJj/ph0Od8/y9G46gI6/13lrzrW1bTs3RwmEKxGyAp8lWN2rkShpCkrzfU/FYkf 53j/rPM18PjNnqn77jrZ/kJLFasaQ4SDglJZk533GUspvjiXZSTFJ8BL3IIosBv4HlBAGrgKvAc8 fGP4b4kpTGRKdd96AAAAAElFTkSuQmCC ------=_Part_54853_3393828.1184775765762-- --===============1721364360== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ --===============1721364360== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ openMosix-general mailing list openMosix-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org https://lists.sourceforge.net/lists/listinfo/openmosix-general --===============1721364360==--