On 04/03/2012 09:07 AM, Josh Boyer wrote:
From a koji perspective, there really isn't much benefit to step 2.
What needs to happen is the RPMs from the secondary hub need to be
copied to the primary in the correct NVR directories in the hub's
storage. That can happen in the background for quite a bit, but at
some point the hub would need to be taken offline to sync up the last
few builds, and then switch the builders over.
Having a staging hub just means you have to copy and move the builders
twice. This is mostly due to how koji builders can only talk to one
hub at a time and one hub only.
Where do you envision the builders being in this scenario? I see the
steps being something like this:
1. SA builders and/or hub are located outside PHX.
2 option a. Builders come up in PHX, hub stays in original location.
2 option b. Staging hub comes up in PHX, builders stay in original location.
3. Both staging hub and builders come up in PHX
4. When appropriate move from staging hub to primary hub.
Having everything take place in PHX prior to the switchover has numerous
benefits. These 3 come to mind immediately:
1. Fast local network will represent true build times (vs transfering
rpms across the external network).
2. Realistic load assessment. If, hypothetically primary koji and
staging koji are both virtual machines on the same underlying hardware
you'll know if the hardware can handle the load. Also network, disk, etc.
3. Comparable infrastructure reliability.
Switching koji hubs twice does incur a bit more work, but it may also
provide better results.
--
Brendan Conoboy / Red Hat, Inc. / b...@redhat.com
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