This discussion was moved to the dev list. Josh
On Sunday, April 14, 2013 5:26:46 PM Madarasz, Norbert wrote: > Hi all, > > This is the first time to write you. As part of my master's thesis at > Budapest University I should simulate the key functions of VCL with > CloudSim. > > For that the allocating logic is very important part means how a computer > is assigned to a reservation. I checked the cwiki page of VCL but the exact > procedure is not published. I've started to look inside the code and found > the predictive levels in PERL modules and it was understandable thanks to > vcld.log file which helped me to backtrace when, how and who called thoose > functions. > > Unfortunately this is not enough because the logic is missing how a > computer will be assigned to an image/reservation. As I saw this allocating > happens in Request.php (fn newReservation()) and maybe the main logic is in > Utils.php (fn allocComputer). My problem is that there is no log that I can > use to backtrace what and when happening and I don't understand how this > allocating works. Some questions: Is it random which available computer > will be used? If a computer is preloaded with the same image that a user > chose too then where and how will be taken this into account and filter > that computers which are preloaded with that image? What happens if a user > requests such an image that is not preloaded on any computer, is it problem > or only the provisioning time period will last a bit more? > > Can someone explain the logic behind the allocating procedure and tell me > how the "computer-id" value of reservations table is calculated? > > Can you recommend me some technique to trace the "happenings" in php > scripts? I tried to use Zend Server instead of php5 server but there is > something wrong. Have you tried to use it with Zend Server, any > documentation or it shouldn't be problem? > > Thank you in advance! > > Best regards, > Norbert -- ------------------------------- Josh Thompson Systems Programmer Advanced Computing | VCL Developer North Carolina State University [email protected] 919-515-5323 my GPG/PGP key can be found at pgp.mit.edu All electronic mail messages in connection with State business which are sent to or received by this account are subject to the NC Public Records Law and may be disclosed to third parties.
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