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RE: Complete LVS-Newbie Questions

To: smg@xxxxxxxxx,<lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: Complete LVS-Newbie Questions
From: Pete Gajria <pete.gajria@xxxxxxxxxxxxxxxxx>
Date: Tue, 11 May 2004 06:54:00 -0700
Will work.

However why have 4 storage units ?
All the realservers can be lightweight (eg p3/p4 + 1or 2gb ram + 40/80gb
hdd)
Then use nfs mounts to attach to a nice large storage at the back end
ie Use 1 storage raid 0+1  to keep thing simple initially

I have a similar cluster going running gentoo & doing xdmcp

So in a nut shell start out with
1 director
1 switch
Couple of realservers
1 storage

& once its up & running then add in the rest

good luck :)

pete

...boy that must be some basement ;)


-----Original Message-----
From: lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx
[mailto:lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx]On Behalf Of Sven
Geschke
Sent: Monday, May 10, 2004 11:45 PM
To: LVS-Mailinglist
Subject: Complete LVS-Newbie Questions


Hi there

I don't know what hit me, but somehow I decided to set up a Linux Cluster in
my Basement.
Some of the hardware was already there, other parts I found on eBay
(actually pretty cheap).
Now I'm almost done with setting up the racks, coming to the wiring and the
patching, I've reached the point where I could use some
help.

Here's my bunch of Questions:

I'm planning to set up the systems according to the following concept:

 to Internet                to local network
       |                          |
       |                          |
       |                          |
|---------------|          |------------------------------------------|
| Proliant 3000 |----------|            Ethernet-Switch               |
| (Router /DNS) |          |------------------------------------------|
|---------------|
       |
|---------------------------------------------------------------------|
|                 Foundry Server Iron XL Loadbalancer                 |
|---------------------------------------------------------------------|
       |                 |                 |                 |
|---------------| |---------------| |---------------| |---------------|
| Proliant 3000 | | Proliant 3000 | | Proliant 3000 | | Proliant 3000 |
|  (Cluster 1)  | |  (Cluster 2)  | |  (Cluster 3)  | |  (Cluster 4)  |
|---------------| |---------------| |---------------| |---------------|
       |                 |                 |                 |
|---------------------------------------------------------------------|
|              Brocade Silkworm 2400 FibreChannel Switch              |
|---------------------------------------------------------------------|
       |                 |                 |                 |
|---------------| |---------------| |---------------| |---------------|
|   NetApp      | |   NetApp      | |   NetApp      | |   NetApp      |
| FC-Storage(1) | | FC-Storage(2) | | FC-Storage(4) | | FC-Storage(4) |
|---------------| |---------------| |---------------| |---------------|

1.) Does  this concept make ANY sense (I know that it's a little late
    to ask this question since the hardware is already there)? :-)

2.) Is it possible/useful to equip the four cluster-servers with a
    second eth-nic, connected to an additional switch to create
    something like a "heartbeat network"?

3.) Is it possible/useful to use only the HA-components and to leave
    the load balancing to the hardware solution (Foundry Switch)?

4.) Better Redhat 9 or Fedora?

5.) I want to run the following applications on t he cluster:
    - Apache (naturally)
    - qmail
    - OpenLDAP (for authentification/single sign-on)
    - mySQL (for a little --or not so little-- web database)
    Are there any known issues or precautions I have to take?

6.) Each NetApp-Unit is going to be a RAID-5 and the four together
    are going to be a RAID-0, which is to be mounted as "/data" on
    all four cluster-servers, so all applications have access to the
    same data (web pages etc.). Is that a good idea?


Any help, either through the list or by email is greatly appreciated


Rgds
SMG


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