Because PreCQ is removed and CQ+1 will do a non-HWTest dry run of a CL on all CQ builders, we’ll need many more machines in the fleet to support this. Currently, we have about 25 PreCQ jobs in flight concurrently. At 88 builders, that leads us to a pool of about 2,200 machines: 2.5x our current fleet.

The biggest problem that we face in doing this is IP whitelisting which is still used for two cases discussed below. This requires us to allocate external IP address blocks to accommodate the IP’s being publicly identifiable. We will remove these two blockers and avoid the public IP addresses. Allocating new public IP blocks can take up to two months.