[mv] Clustering Minivend-Success!

["Jimmy Eaton" <jeaton@silverclicks.com>]

******    message to minivend-users from "Jimmy Eaton" <jeaton@silverclicks.com>     ******

We have set up a cluster of two pawn servers, a Mysql database server and a
director.  A total of 4 machines. It took about two days to get it working.
As usual the main problem was permissions.

We still have bugs and a session will sometimes get lost.  Also there seems
to some problem with searches on the pawns but which are no problem on a
one-machine setup.

We have the session directory as an nfs directory on our data server and
shared with our pawns.

Some of the problems we encountered were:
Make sure that date and time are the same on all machines. You will get an
error if a session tries to get a creation date and time in the past as to
your different machines.

The nfs server was set up assuming that read-write was the default on the
shared drives (the books say so) However, the directories came out read only
until we specifically shared them as read-write.

You must make sure that all uids and guids are the same on all machines
otherwise you will have minivend as a user on one machine but will appear as
a different user on shared files.

Our beta server is at :

http://www2.silverclicks.com/mall/silverclicks

There is no guarantee it will be up and running.

At the top of the page we have the word Pawn2 come up on all pages served by
pawn number 2. The other pages are served by pawn 1.

We are using ipvsd as our clustering software.  Server load is balanced by
open connections.  The pawn with the fewer open connections get the next
hit.  I know very little about this software except that it appears to work.

Jimmy Eaton
Silverclicks.com, Inc.
jeaton@silverclicks.com

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