Re: ejabberd vs. Tigase

Hello,

The pubsub version in 2.1 will be even more efficient.
Regarding pubsub, at the current stage there can still be a few benefit
using it:
- Clients can be limited in term of bandwidth
- In the future, is you support s2s, delivery can be made in a single
packet with several recipients on the target s2s server. Addressing the
final messages will be made locally.
 

Dan Le wrote:

   > Thank you both for your responses.
>
> I managed to run a few test myself using Tsung, simply looking at how
> well each handled rapid connections to the XMPP server (20K
> connections). Unfortunately, I couldn't get Tsung clients to receive
> messages from a specific client (seems Tsung only supports
> bidirectional messages for subscription requests only at the moment).
> From just managing connections, it seems Tigase has a much higher CPU
> usage, ~30% CPU for an inter-arrival time of 0.005s up to 20K
> connections, compared to ejabberd's ~3% CPU usage for the same test.
> Memory usage was not nearly as different, but ejabberd (500 Mb) still
> used less than Tigase (750 Mb). Comparing against Artur's 500K test,
> my numbers seem reasonable (he was getting ~11% CPU, but with a much
> beefier server). Do any of these number seem inaccurate to anyone?
> (Hardware is a two quad-core sun fire x4150, I don't have the more
> detailed specs off-hand)
>
> We likely won't be using PubSub, since at broadcast time, the
> recipient list will be dynamic. Is PubSub much more efficient than
> sending a message one by one to each client? I heard both ejabberd and
> Tigase supporting millions in pubsub projects, but often over a number
> of nodes. We will only have a single node, potentially a second node
> at max. Anyone have deployment numbers/limits on only one or two
> nodes?
>
> Thanks,
>
> Dan
>
> On Mon, May 25, 2009 at 3:33 AM, Mickael Remond
> <[email protected]> wrote:
>
> Hello,
> Tomasz Sterna wrote:
>> Dnia 2009-05-06, ¶ro o godzinie19:47 -0400, Dan Le pisze:
>
>>> Has anyone worked with both ejabberd and Tigase and could offer
>>> insights on how they compare in terms of performance, resources used
>>> (CPU, RAM), community support, ease of use, and the like?
>
> I can only speak for ejabberd, but there should be more than 10000
> deployments around the world running ejabberd and ranging from very
> small to very large deployments.
> Regarding consumption, ejabberd is probably the one that can be
> tuned
> to the smallest size. We have been running ejabberd with 500
> simultaneous users on a Linux PDA.
> Regarding the large size deployments, we have many very large
> deployments (currently working on several one supporting more that a
> million simultaneous online users). You can tune it and tweak it to
> fit
> your need. You can do thing which are not possible with other server
> in
> a very short amount of time.
> Regarding pubsub as well, feedback from current deployment is very
> good. Supporting millions of nodes with large number of items is
> possible. It is also very flexible thanks to its plugin
> architecture.
> We plan to give more details soon on the very large scale pubsub
> projects we are working on.
> You can contact me privately if you want to discuss your project in
> more
> details.
> --
> Mickaël Rémond
> http://www.process-one.net/
>
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-- 
Mickaël Rémond
 http://www.process-one.net/
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