dbmail LBL cluster report

hi, list

I just did little 3-node LBL cluster for some network
services and 
especially for dbmail. each node is domU on separate xen
server with 
1024M RAM and 2 VCPUs. all this stuff is loadbalancing by
LVS (which 
live in separate domU too) and healthchecking by keepalived.
works 
great. I think (but not sure), that separating dbmail on
different VMs 
(even if you have only one physical server) is good idea,
until dbmail 
team will not implement multi-foo architecture. I do not
strict tests 
yet, but users said, that LBLed dbmail shows damn better
robustness. 
more taste things it's connection persistence which
providing by LVS and 
highly decreased annoying "opening folder..."
pauses (thunderbird's 
"feature"), high availability and better hardware
utilization. if 
anybody interesting, I'll post howto to wiki.

alexander

p.s. I believe that LBL advantages will works only if you
have powerful 
DB server
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On Donnerstag, 19. Juli 2007 Alexander Benaguev wrote:
> if anybody interesting, I'll post howto to wiki.

I'm interested, but not sure if this can really work stable.
How can it 
be without database support?

mfg zmi
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Michael Monnerie wrote:
> I'm interested, but not sure if this can really work
stable. How can it 
> be without database support?
>   
hi, Michael

database loadbalancing or (and) high availability it's
separate task. I 
did HA for DB with linuxHA project
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On Freitag, 20. Juli 2007 Alexander Benaguev wrote:
> database loadbalancing or (and) high availability it's
separate task.
> I did HA for DB with linuxHA project

OK, I'm very interested in this. How is HA achieved? It's a

active-standby strategy, right? Because if two or more
PostgreSQL 
servers would be active, it would be load balancing.

I want to do an active-standby configuration to another
server in 
another city, to have HA, so your concept interests me a
lot.

mfg zmi
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