Re: High availability

["Taymour A. El Erian" <taymour.elerian@tedata.net>]

Dmitriy Kirhlarov wrote:
> Taymour A. El Erian wrote:
> > Hi,
> >
> > I have been searching for a long time to find a solution to give me 
> > high availability on the writing. We have 2 ldap servers running as 
> > multi master (I know it is not considered a good thing and it is very 
> > old 2.0.x), this way if one is down the other will accept writes 
> > (add/modify/delete). If we do the normal single master multiple 
> > slaves, we will get more performance and high availability for reads 
> > but if the master is down no updates. Also, we can not separate 
> > writes from reads and we can not use referrals (not all applications 
> > we have can chase referrals). I though of having a standby master and 
> > use heartbeat but it doesnt look like a stable solution, any ideas ? 
> > maybe shared disk ?
>
> For openldap 2.{2,3}.x you can use ggated+gmirror+carp (on freebsd) or 
> heartbeat + mirror with drdb (on linux). It should work.
>
> For openldap 2.4 two-node multi-master solution declared, afaik, but 
> currently 2.4 is alpha.
>
> WBR.
> Dmitriy
Thanks dmitriy, Would you happen to have any documentation regarding 
Linux. What about the case I explained, that we have clients that do 
read/write, how to send the writes to the masters and reads to slaves 
without having the clients chase referrals ?


--
Taymour A El Erian
System Division Manager
RHCE, LPIC, CCNA, MCSE, CNA
TE Data
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