1) DRF is based on the _current_ allocation of resources (from the master's perspective) rather than a historical allocation of resources.
2) So when a new cluster is started, all frameworks will have a current allocation of 0. And assuming all else (like quotas, roles, and weights) are equivalent (or not set to anything), then your 2 frameworks would receive roughly equal shares of offers. 3) As of right now, there is no way for the framework to directly influence the number of offers received in a single call. The best approach to getting offers on multiple machines is to hold onto the offers (i.e. not accepting nor declining them) until your necessary conditions have been met. On Tue, May 22, 2018 at 2:56 AM, Thodoris Zois <[email protected]> wrote: > Hello list, > > I have some questions about resource offers for Mesos and I am > experiencing some problems that I hope somebody will be able to help. > > 1) The allocation module of Mesos master uses DRF (according to > previous allocation history) and decides which framework will get an > offer, and how many resources will be offered. Is this right? > > 2) Assume that a Mesos cluster starts for the very first time and 2 > frameworks join. None of the frameworks has a job to submit, they just > wait and get offers. What is the policy to send resource offers since > master does not know anything about previous allocations? > > 3) I got a Mesos cluster with 5 machines and 1 framework only. Is there > any way to force Mesos send everytime all the five resource offers to > my framework? I have seen that when the framework registers for the > first time, it gets a list of offers that include all 5 machines. > However, if it does not accept them the next round of offers contains > only 2 or even 1 machine, depending on the time that framework has > declined. > > Thank you very much for your response, > Any help is appreciated! > > - Thodoris >
