[CentOS] Load Balancing

[Charles Lacroix]

Hi, 

just check ndbd from MySQL, i tried it with " simple " table format.
It's great but there are 2 major drawback. 

1. it only supports a single table format which doesn't support foreign keys. 
( for me this is problematic )

2. all the database is stored in ram so large data isn't welcome.

But other than that the project looks nice.
Later

On Tuesday 23 May 2006 18:32, Mace Eliason wrote:
>  From what I have learned reading.  What do people think about using
> heart beat between two boxes, rsync to sync the www directories and
> other files, and use mysql replication?
>
> My only question is I have found in the system that I setup with mysql
> replication it worked great but if you remove one of the servers and put
> it back in you have to stop mysql and copy over the newer database and
> then restart both to get it to replicate correctly.
>
> Is there a way to get replication to work so it will automatically sync
> the master and slave without having to stop and copy and restart?
>
> Bowie Bailey wrote:
> > Fabian Arrotin wrote:
> >> On Tue, 2006-05-23 at 12:49 -0700, Dan Trainor wrote:
> >>>> For the backend storage, it depends what's your budget ... :o)
> >>>> A minimal setup is to use nfs on a central server to host/share
> >>>> the same data across all your machines ... the problem in this
> >>>> config is that the nfs server becomes the single point of failure
> >>>> ... so why not using a simple heartbeat solution for 2 nfs
> >>>> servers acting as one and uses drdb between these 2 nodes for the
> >>>> replication ...
> >>>> Other method is to have a dedicate san with hba in each
> >>>> webservers but that's another budget ... :o)
> >>>>
> >>>> Just my two cents ...
> >>>
> >>> HI, Fabian -
> >>>
> >>> I've been toying aroudn with both NFS and GFS, but NFS does leave me
> >>> with a single point of failure.  I'd rather not use something like
> >>> drdb, however.  I'm still researching GFS to see if it's a viable
> >>> alternative for what I'm looking for.
> >>>
> >>> Thanks!
> >>> -dant
> >>
> >> GFS can do the job, but in this case you should have a real shared
> >> storage to permit all the servers to access the shared data in the
> >> same time ...
> >> If you don't want to invest a lot, you can still use iscsi but the
> >> single point of failure still exists ...
> >
> > It tends to be expensive to do away with all points of failure.  The
> > best you can do on a budget is try to limit your points of failure to
> > things that tend to have a long lifespan (i.e. almost anything other
> > than servers and individual hard drives).
> >
> > For another (relatively) low-cost option, check out the AoE storage
> > appliances from Coraid.com.  Mine is still in testing, but it was very
> > easy to configure with CentOS4 and I haven't found any problems with
> > it so far.  I currently have a 1.2TB storage area shared between three
> > CentOS servers with GFS.
>
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