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Re: Persistance and LVS

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: Persistance and LVS
From: pb <peterbaitz@xxxxxxxxx>
Date: Tue, 27 Apr 2004 13:55:46 -0700 (PDT)
Malcom or anyone,

We actually do have 20,000+ WEBMAIL users and during
bis. hours send 1mill mails daily.  Persistance is
currently set to 15 min (900 sec) on the LVS, so how
would that affect memory and performance to up this to
60 min (3600 sec) (so it matches the 60 min
auto-logout time at the webmail application real
server side) ? 

Thanks
Peter  


--- Malcolm wrote:
> 
> You don't seem to have many users so why not just
> set persistence to 45mins.
> 
> A better solution would be to have persistent
> sessions on your webmail 
> servers then you won't need persistence at all.
> 
> 
> 
> pb wrote:
> > Hello LVS / Piranha,
> > 
> > I have PERSISTENCE set to 900 (15 min) for
> HTTPS/HTTP
> > which shows up like this with "lvsadm -L" 
> > 
> > TCP  mp-cluster.jmu.edu:https wlc persistent 900
> >   -> rserver1:https         Masq    1      3      
>   
> > 47
> >   -> rserver2:https         Masq    1      1      
>   
> > 211
> >   -> rserver3:https         Masq    1      1      
>   
> > 224
> > 
> > We use this for Mirapoint WEBMAIL.  Some people
> have
> > recently complained that for about a month, they
> begin
> > experiencing INVALID SESSION ID errors after
> typing in
> > a lengthy email and clicking SEND.  
> > 
> > We've been using Piranha/LVS for a couple years,
> and
> > never seen this, and it is not everyone having
> this
> > problem, many do not.  We're checking with our
> mail
> > vendor too, but we just recently upgraded
> > 
> >       Red Hat Linux 7.3 + Piranha
> >  
> >                 to
> > 
> >       Red Hat Enterprise Linux AS v3 + Piranha 
> >                                      Cluster Svcs
> > 
> > about 45 days ago - thats how long one of the two
> > Piranha clusters has been up.
> > 
> > 
> > Any insite as to how PERSISTENTS of 15 minutes
> facors
> > into someone typing a message in WEBMAIL for
> example
> > for 30 minutes, would be well appreciated.
> > 
> > Thanks,
> > Peter
> > 
> > 
> >     
> >             
> > __________________________________
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> 
> 
> -- 
> Regards,
> 
> Malcolm Turnbull
> 
> Loadbalancer.org Limited
> 07715 770523
> http://www.loadbalancer.org/
> _______________________________________________
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