[wp-hackers] Load Balancing | Media Uploads to Multiple Servers

[Tim Schoffelman]

Actually, I think (and I'm not the sysadmin but the developer) our rsync set
up functions differently than what was communicated earlier (previous
intention was to paint a picture of the benifits of rsync, but since it
seems we all know that now, I can probably explain further). The description
below "should" help paint a clear (or atleast better) picture.
Right now we have a 2-Way sync set up.

1) Common Sync dir (On Disk Copy)

/....../sync-uploads/$siteName/PATH

on our Admin box a symbolic link will be created from the "upload dir" to
the sync-uploads dir.  All uploaded content will live in sync-uploads and
will sync (single RSYNC) to the NFS mount.

Example

/....../sitename/wp-content/uploads

becomes a symbolic link

ln -s  /....../sync-uploads/sitename/wp-content/uploads/ uploads

2) NFS Mount - /../sitesync

/../sitesync and /....../sync-uploads are a mirror of each other the NFS
mount allows all files to be pulled and pushed across multiple nodes.  The
Actual content is served off the local sync-uploads copy.

Hope this helps stir on some ideas.

~tim


On Wed, Jul 29, 2009 at 9:58 AM, Steve Pellham <spellham at gmail.com> wrote:

> Simon, is the sync real-time as content is uploaded or nightly (or other
> frequency) as suggested by Tim?
>
> Tim - if you only update nightly... are your servers used for backup only
> or
> real-time load balancing?  Again, the concern is viewing a post on a server
> where an image is not available.
>
> On Wed, Jul 29, 2009 at 9:02 AM, Simon Wheatley
> <simon at sweetinteraction.com>wrote:
>
> > The load balanced solution I'm deploying to as I type has file syncing
> > in the OS File System. Perhaps worth looking at as well as a WP
> > solution?
> >
> > S
> >
> >
> > On Wed, Jul 29, 2009 at 3:00 PM, Steve Pellham<spellham at gmail.com>
> wrote:
> > > Is anyone aware of an existing plugin for the post editor pages and/or
> > media
> > > gallery that would push uploaded media (images, video, etc....) to
> > multiple
> > > servers in cases where a WP installation is load balanced?
> > >
> > > DB changes are handled via local and wan replication, but I'm looking
> for
> > a
> > > solution for keeping other media in sync as new images/videos are added
> > to
> > > the gallery, inside posts, etc...  I can think of ways to accomplish
> this
> > > (ftp, rsync...), but I haven't yet found an existing plugin for this.
> >  Don't
> > > want to reinvent the wheel unless absolutely necessary.
> > >
> > > Thanks, Steve
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> >
> >
> > --
> > Simon Wheatley
> > Sweet Interaction Ltd
> > Web Interaction Design & Development
> > Tel: 07971 687295
> >
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