-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wednesday September 09, 2009, Brian Bouterse wrote: > Hi All, > > I'm wondering what the scalability limits of VCL? What are the limits > of the vcld component, and why do we believe they exist? Does the > frontend have any scalability limits?
There are 2 parts of the frontend code that could cause sluggishness with heavy loading. The code that determines a user's authorization is not very well optimized and slows down as the privilege tree gets larger. The other area is that the scheduler can only allow one user through at a time to keep from double booking resources. If a very large number of users tried to make reservations at the same time, they could end up waiting a bit to be allowed through that part of the code. Even with those weak spots, I would think it would support in the 10s of thousands of users (though your db server would need to be pretty good). Josh > I'm trying to figure out what the reasonable number of VMs a single > vcld installation can concurrently support. What do you think and why? > > Best, > Brian > > > Brian Bouterse > NEXT Services > 919.698.8796 - -- - ------------------------------- Josh Thompson Systems Programmer Virtual Computing Lab (VCL) North Carolina State University josh_thomp...@ncsu.edu 919-515-5323 my GPG/PGP key can be found at pgp.mit.edu -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFKp+cjV/LQcNdtPQMRAmXLAJ0Ym9M15CGcSmD2FQdHdUmKkqLnRwCfcBXJ y+WqaE7P49b5yrl6c6hYr08= =av4W -----END PGP SIGNATURE-----
