[nylug-talk] Sharing state between frontend web servers

[Michael Bacarella]

I have web server A.

We want handle increased load and add fault tolerance by
adding web server B.

The challenge is of course synchronizing sessions and
uploaded content between web server A and B.  I've 
usually set up an NFS server F and have both A and B
map the exported filesystem from F.

While this solves some scalability issues, it does move the
point of failure to F; but this is solved by setting up a
periodic rsync from F to duplicate server G.

I wonder if anyone uses other approaches with success?

--
Michael Bacarella <mbac at netgraft.com>

1-646-641-8662 (cell)

545 Eighth Avenue * Suite 401
New York, NY 10018

http://michael.bacarella.com/