[TYPO3-english] Failover and/or load balancing

Koji Yanagisawa yanagik317 at netscape.net
Wed Mar 7 17:58:42 CET 2012


1. They would be in the same machine room.
2. No reverse proxy.
3. Database is only redundant in the sense that I have master-slave replication going.
4. This is my main concern and reason for posting.  We once upon a time had the Apache document root NFS mounted (for web server redundancy!), but I was told I/O demand on typo3temp (potentially because of Powermail or whatever else) was such that we couldn't keep typo3temp there.  Our website started "acting funny."  Now it's a soft link to a local mount point.  I can definitely keep typo3conf on NFS but I was wondering if Typo3 requires that typo3temp be exactly the same across all web servers.  I can be bold and consider something like DRBD, but I'm averse to possible overengineering.
5. No publication server (I'm assuming this the the server people use Typo3 BE).

I'd like to keep this discussion to web server redundancy and not so much other components involved in website's overall redundancy for uptime's sake.  I do like to hear what other people do to achieve this in general but I'm very interested in what potential gotchas Typo3 as an application has.

Thank you,


On Mar 7, 2012, at 2:37 AM, Kay Strobach wrote:

> Hi,
> there many possibilities.
> You may describe your screnario more in detail:
> 1. Are the servers located in the same computing centre?
> 2. Do you have a reverse proxy (highly recommend)
> 3. Is your database redundant?
> 4. How to you ensure, that the files in /fileadmin, typo3conf/ and
> uploads are consistent (nfs, rsync)?
> 5. do you have a third central publication server?
> Regards
> Kay
> Am 07.03.2012 00:05, schrieb Koji Yanagisawa:
>> Dear Typo3sters,
>> Has anyone implemented either failover or load balancing (and consider failover sort of done) in terms of web server?  Not so much the database part, but I'm wondering if, say, 2 web servers can have each its own typo3temp?  Do you just DNS round robin it (point www.blah.com to 2 IPs)?  Or do you CNAME www.blah.com to like www1.blah.com and www2.blah.com?
>> Thanks,
>> --Koji
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