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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