I was thinking that portable and very simple implementation in php would be
much more used in real world than these experimental too abstract
implementations.
but i guess i'm wrong.
2007/8/3, Rasmus Lerdorf <[EMAIL PROTECTED]>:
>
> Constantin B wrote:
> > Hello,
> >
> > i'm not sure its the right place to post this message, so redirect me if
> i'm
> > wrong.
> >
> > Here the problematic :
> >
> > We are alot running php across multiple backend servers and we all know
> that
> >
> > we need to syncronise the php sources usualy we do that with rsync ,
> some of
> >
> > us run all backends on an NFS feed.
> >
> > -> the usual problem is that the developpers like to see their changes
> in
> > "live"
> > and we dont want to let them touch the holly rsync script.
> >
> > Here the idea :
> >
> > if we could have an option in php.ini or a new wrapper localcache:/ we
> could
> >
> > get all require / include / require_once / include_once functions to
> make a
> > local copy of needed files then require / include them as usualy.
> >
> > here an exemple :
> >
> > require("/path/to/file.php"); // the /path/to/file.php is on an nfs
> mount.
> >
> > require should :
> > 1 : check in /localcopy/path/to/file.php if it exist
> > 2 : then if its not too old // we can define what this means later // it
> > just require it as now
> > 3 : if the file does not exist or if its too old we refresh it from the
> > /path/to/file.php and require it .
> >
> >
> > result :
> > 1:this will lead all scripts run unmodified but from /localcopy/
> > 2: the nfs is not loaded at all and wont be a bottle neck
> > 3: developpers can change their files and dont need to access the "holly
> > rsync"
> > 4: all the backend servers auto syncronise and keep in sync.
> >
> >
> > We could imagine not to fetch the files from the nfs but by http also .
> (at
> > step3 ) this remove the need of nfs at all.
> >
> > This would allow us to run large backends without the syncronisation
> issue .
> > And would be a huge perf boost over nfs.
> > I dont think it will also disturb opcode caches like apc as if we do it
> > early it will not notice that the file was refreshed from "remote".
> >
> > Its just an idea but i'm sure it can be realy usefull for big farms.
>
> This doesn't sound like something that should be part of PHP at all.
> This is a generic file system caching mechanism which can be implemented
> using FUSE. There are even implementations out there of an rsyncfs
> which pretty much does exactly what you are looking for.
>
> -Rasmus
>
