Hi, I agree with Stefan, multiple scp's usually will require some tunning at the TM level to speed up things. Unfortunately this strongly depends on your setup.
A kind of work around (also suggested by Stefan) is to limit the number of simultaneous deployments. This can be done with the new scheduler with -d option (check [1]). Also take into account that you should also adjust -t so the deployment of VM finishes before you start the next one... Cheers Ruben [1] http://www.opennebula.org/documentation:rel2.0:schg On Tue, Sep 21, 2010 at 12:57 PM, Stefan Freitag <stefan.frei...@udo.edu> wrote: > Hi Luis, > > in Dortmund we have ~250 physical nodes and transfer at the moment the VM > (8 GByte per Image) images via SSH to the nodes. Due to the load caused by > the SSH transfers we limit the number of VMs deployed in parallel to two. > Three or four VMs in parallel should also be possible, but (hopefully) in > very near future we will migrate to another setup: > then scp-wave will be used in the background to transfer the images to the > physical nodes and a "home-brewn" tm mechanism will put in place to start > the VMs on the nodes. > > Cheers > Stefan > > > Luis M. Carril schrieb: >> Hello, >> >> We've a OpenNebula 2.0 cluster in SSH mode and when we deploy near >> simultaneously 3 or 4 MVs of about 1GB, sometimes some of the >> deployments fail because SSH/SCP connection timeouts. >> I've seen in diferent slides that is possible to make TM plugins >> based on parallel-ssh or bittorrent. >> >> Has anyone experimented similar problems, or developed some of >> these plugins? >> >> Best regards >> >> -- >> Luis M. Carril >> Técnico Superior >> Centro de Supercomputacion de Galicia (CESGA) >> Avda. de Vigo s/n >> 15706 Santiago de Compostela >> SPAIN >> >> Tel: 34-981569810 >> lmcar...@cesga.es >> www.cesga.es >> >> >> ================================================================== >> >> _______________________________________________ >> Users mailing list >> Users@lists.opennebula.org >> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org >> > > > -- > Dipl.-Inform. Stefan Freitag > Institut für Roboterforschung - Abteilung Informationstechnik > Universitaet Dortmund | phone: +49 (0)231-755-7009 > Otto-Hahn-Str. 8 | mobile: +49 (0)176-23900074 > 44221 Dortmund, Germany | fax: +49 (0)231-755-3251 > www.irf.uni-dortmund.de | email: stefan.frei...@udo.edu > > _______________________________________________ > Users mailing list > Users@lists.opennebula.org > http://lists.opennebula.org/listinfo.cgi/users-opennebula.org > -- Dr. Ruben Santiago Montero Associate Professor (Profesor Titular), Complutense University of Madrid URL: http://dsa-research.org/doku.php?id=people:ruben Weblog: http://blog.dsa-research.org/?author=7 _______________________________________________ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org