[Typo3-dev] Mirroring typo3.org etc.

[Michael Scharkow]

Mathias Schreiber [K1net] wrote:
> ? Why can't you work when typo3.org is down?

Some Examples: Get badly needed extensions, look up documentation, 
browse around during idle time...

> Steffen Mueller wrote: 
>>I'm not very familiar with mirroring tools (rsync?), but is it
>>possible to sync the mirrors "on the fly"? Thus there won't be any
>>differences between the mirrors and the main server.

Unless you multicast all transactions to all servers, there will be some 
delay. Depends on how often you sync (getting the filelist from the 
master will take longer than syncing the files if your update interval 
is too short, and vice-versa. (With rsync, at least)

> Professional replication tools are available and are way out of range in
> price.
> Think about a new car or about a replicator.

For plain files, rsync should work even on large filesystems, especially 
with typo3 there's probably not so much going on there, compared to the 
DB at least.

>>Since mirroring static files won't provide a full mirror (search
>>engine will be missing, ...), it has to be set up differently.
>>Syncing the
>>MySQL databases would be a solution, but is that wanted?
> 
> 
> Sync 12 GB via web.
> Traffic is expensive, remember this.

Those 12 GB is the DB-File, I assume. So for one giant file, rsync and 
friends would, of course, fail, but MySQL seems to have some kind of 
sync-ability, according to http://www.mysql.com/doc/en/Replication.html

If I understand the document correctly, there would only be differential 
updates, as with rsync = much less traffic.
But since I don't know anything about the typo3.org infrastructure, nor 
much about MySQL, I don't know whether this would be an option.

Peace,
Michael