Konstantin - thanks for your reply - fantastic details response! :-)
I'll go through in more detail, but wanted to get you a fast basic response
your last sentance says it all really - ie a single repository with VPN
access. However - our main problem is that a large number of changes in the
UK will take a long time to get when the US office come on-line (we have
lots of HTML etc). With SVN we can configure it to synch a copy to a
read-only repo in the US. This can also be configured such that any commits
are done to this read-only repo, but are * automatically routed to the main
repo in the UK* ...this makes for an easy and fast (for "check-out" anyway)
solution for the US team. Git does not seem to help here...
On Thursday, December 19, 2013 1:35:26 PM UTC, Konstantin Khomoutov wrote:
> On Thu, 19 Dec 2013 04:42:13 -0800 (PST)
> > ...our main requirement is for changes made in the UK available to
> > be available the US for fast/easy check-out (check-in not so
> > important).
> > SVN can crack this either via WanDisco (commercial), or via some
> > master-slave auto-sync thing-
> > -Does Git help us with this at all? - perhaps it makes it *more
> > difficult* by requiring a two-step push??
> Hmm, I don't quite get the problem. As you mention pushes, supposedly
> you imply you have a central repository to which your devs (or whoever
> else) push changes from their private repos, right? If yes, then
> what's the problem of making this central "rendez-vous" repository
> available to both UK and US offices? Say, by means of a VPN tunnel, a
> private Git hosting etc.
> If this is impossible/undesirable for some reason, you can either set
> up automated *mirroring* by hand or use a ready-made solution (such as
> that provided by gitolite). The way to implement mirroring depends on
> whether you want "passive" (or "pull") style, when the US office
> periodically checks to see if there's anything new in the UK central
> repo) or "active" (or "push") style, when a post-update hook set in the
> US shared repository queues a task to push the changes from that
> repository to the one in the US office.
> Pull-style mirroring is easy:
> 1) Create an initial bare mirror clone:
> us_server$ cd /srv/git
> us_server$ git clone --bare --mirror ssh://git@uk-server/uk.git
> 2) Set up a cron job that just `cd`-s to /srv/git/uk.git and
> runs `git fetch` there. The refspec (the "what to fetch"
> specification) set up by the initial clone operation should make
> `git fetch` grab everything the remote has and update the
> local stuff with that.
> Push-style mirroring is harder because you has to compensate for
> possible case of rapid pushing where someone updates the repo so fast
> several copies of the post-update script propagating the changes are
> spawned because they are slow to complete. So some sort of locking or
> queuing should supposedly be implemented. As to how to do such
> mirror-push, you just do something like
> uk_server$ git push ssh://git@us-server '+refs/*:refs/*'
> where the refspec +refs/*:refs/* tells Git to send all the refs
> (branches and tags) existing locally to the refs with the matching
> names on the remote side, creating them if necessary, and also
> force-updating them if needed ("+").
> Of course, the remote repo must be bare and must accept forced updates
> (this is the default).
> Surely, you might opt to do more fine-grained synchronizing by pushing
> or fetching only a set of selected branches. This will just make your
> refspecs more involved, and will possibly require you to also use the
> --tags command-line option. Read the git-fetch and git-push manual
> pages carefully.
> To recap, in my opinion, the best option is to just provide direct
> network access to the single shared repository (or a set of them if
> several projects are being collectively worked on) to both offices by
> means of a VPN or by using shared Git hosting (making it by hand on a
> cheap VPS/VDS is also an option).
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