Re: Traveler on i and HADR options

[Chris Whisonant <chris.whisonant@xxxxxxxxx>]

"It is a real shame that IBM/Lotus didn't make this part of the
functionality actually work WITHIN the Domino infrastructure..."

I was once in this mindset too, but there are a couple of reasons for this,
which I'm not sure I can fully dive into since I expressed my concerns with
this to IBM during the beta periods and via one-on-one discussions at
Lotusphere. I'm not sure at which point some of my discussions were NDA,
but suffice it to say that I believe that where IBM has taken Traveler HA
is great and is working for them.

With regards to the single point of failure on the DB side, yes that can be
a pain point. However, IBM DOES support utilizing the DB vendor's HADR
facilities with the stipulation that the HA replica of the DB is in the
same physical datacenter. This way you don't still have that single point
of failure. I know how that could play out with DB2 using HADR, but I'm not
sure how that would translate into IBM i DB2 HA...

I'm also curious as to what you'll be doing to frontend your Traveler
servers in HA? What HTTP load balancing mechanism will you be using?


---------------------------------------------------

Thanks,
Chris
Personal Blog: http://cwhisonant.gotdns.com
Work Blog: http://www.bleedyellow.com/blogs/lotusnut


On Tue, Aug 27, 2013 at 11:43 AM, <ChadB@xxxxxxxxxxxxxxxxxxxx> wrote:

> It is a real shame that IBM/Lotus didn't make this part of the
> functionality actually work WITHIN the Domino infrastructure...
>
>
>
> From:   ChadB@xxxxxxxxxxxxxxxxxxxx
> To:     "Lotus Domino on the IBM i \(AS/400 and iSeries\)"
>             <domino400@xxxxxxxxxxxx>
> Date:   08/27/2013 11:40 AM
> Subject:        Traveler on i and HADR options
> Sent by:        domino400-bounces@xxxxxxxxxxxx
>
>
>
>
> We've had great results with Domino 9 so far the week that we've been on
> it.
>
>
> I'm now testing Traveler on i (we have always run it on a Windows server
> that was leftover from a phased out Blackberry BES oriented Domino Server).
>
> The Traveler functions seem to work great with our test devices so far, but
> i'm finding that setting it up to be highly available is going to be a bit
> of a mess...
>
>
> We have 2 clustered Domino servers that support mail users and have no
> problem getting the external URL that the Traveler mobile devices access to
> switch between whichever mail server we want to 'answer' at any given time.
>
> The challenge is that the Traveler portion of the data (when configured for
> HADR) is moved to a DB2 database... it's an easy conversion and works well,
> but the data needed by the Traveler server and devices is in ONE location.
> If that location is down, effectively so is Traveler functionality.
>
> BOTH of the Traveler servers (when converted to HADR) can be pointed to the
> backend DB2 database with no trouble, but the single point of failure
> remains.
>
>
> All of the documentation I can find mentions that the backend DB2 database
> can be made highly available between servers, but so far I have not found
> an easy way to do this on the IBM i.  What sort of replication would keep
> this backend DB2 database in synch so that either Traveler server could use
> it from either location of the DB2 backend?
>
> Has anyone tackled this type of setup yet?
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