hydra/src/sql/upgrade-21.sql

alter table Jobsets
    add column schedulingShares integer not null default 100;
hydra-queue-runner: Improved scheduling Each jobset now has a "scheduling share" that determines how much of the build farm's time it is entitled to. For instance, if a jobset has 100 shares and the total number of shares of all jobsets is 1000, it's entitled to 10% of the build farm's time. When there is a free build slot for a given system type, the queue runner will select the jobset that is furthest below its scheduling share over a certain time window (currently, the last day). Withing that jobset, it will pick the build with the highest priority. So meta.schedulingPriority now only determines the order of builds within a jobset, not between jobsets. This makes it much easier to prioritise one jobset over another (e.g. nixpkgs:trunk over nixpkgs:stdenv). 2013-09-21 14:47:52 +00:00			`alter table Jobsets`
			`add column schedulingShares integer not null default 100;`