On Wed, Apr 20, 2016 at 10:20 AM, Barak Korren <[email protected]> wrote:
> On 20 April 2016 at 10:16, Eyal Edri <[email protected]> wrote: > > > > > > On Wed, Apr 20, 2016 at 9:28 AM, Barak Korren <[email protected]> > wrote: > >> > >> > I'd try that approach first, though the mirror is a good idea that > will > >> > probably have to be implemented anyhow once we start adding slaves, > >> > having real > >> > info on the network usage/errors will give us insight to actually > >> > determine > >> > what's the issue, and thus, what's the best solution. > >> > > >> > @infra what do you think? > >> > > >> > >> The issue with mirroring is how can you make sure that you mirror fast > >> enough to enable CI. Even if Gerrit can push to the mirror on patch > >> submission, there will still be some time delta between the submission > >> happening (and the patch event showing up in Jenins) and the mirror > >> being synced. This looks like a nasty race condition. > >> What the mirror essentially does is make sure that bits are copied > >> from Amazom to PHX just once. I wonder if we can get the same benefit > >> with a simple HTTP proxy, how proxy-able is the Git HTTP protocol? > >> > > > > I think we should prioritize mirroring the GIT (not gerrit) repos to PHX, > > this will help: > > > > Speed up all post merge jobs and reduce potential of errors from git > clone > > (they will be in the same network) > > Reduce load (?) from the gerrit server and perhaps reduce errors of the > per > > patch jobs that will still run from gerrit.ovirt.org (AMAZON) > > A longer goal will be either to migrate the gerrit server to PHX or to > find > > away to properly mirror the gerrit server (but then i fear there might be > > race/problem as mentioned) > > > > Please look at my comment about possible race conditions caused by > mirroring. Simple mirroring may cause more trouble then its worth. We > need to consider proxying instead. > I don't see how a race condition can occur with a merge commit, Can you elaborate? -- Eyal Edri Associate Manager RHEV DevOps EMEA ENG Virtualization R&D Red Hat Israel phone: +972-9-7692018 irc: eedri (on #tlv #rhev-dev #rhev-integ)
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