[Spread-users] Membership algorithm--continued
kevin_tian9844 at yahoo.com
Thu Apr 15 23:30:47 EDT 2004
It's very helpful.:-)
But new problems came.
In function Form_or_fail, which case can lead to
Token_alive =1 and F_reps.num_reps= 1? I guess there
is only one daemon?
If daemon is not the smallest rep and token is not
alive, why we conclude the gather process fails and
then restart to gather?
In addition, I think the implementation do not check
whether agreement is reached before creating and
circulating the form token, thus violating the
And it seems that there is no business of regular
group members---the actual clients do NOT participate
in the membership algorithm. How do they get
membership information then? E.g., Who are the clients
of my group? Is it handled in group.c?
I look through the code, but it is too much for me.
--- Ryan Caudy <caudy at jhu.edu> wrote:
> Here are brief answers to your questions. If I miss
> something, I'm sure
> Yair or Jonathan can fill it in. If these cause
> more questions, feel
> free to follow-up.
> The SEG state is a state in which a daemon tries to
> find other members
> of its segment, after the current membership has
> been lost. REPRESENTED
> is for the daemons that don't go to GATHER, i.e.
> those that are
> represented by another daemon in their segment.
> A POTENTIAL_REP is just that... the potential
> representative of another
> segment, someone to contact when looking for
> representatives of other
> segments. SEG_REP is the representative of a
> segment, RING_REP is the
> representative of a whole Spread network. A conf
> leader is the leader
> that will become a RING_REP... he is first in the
> membership as defined
> by the configuration file. Seg leader is similar,
> but for a segment.
> kevin Tian wrote:
> > Hi,
> > Is there anyone who's interested in the detail of
> > membership implementation?
> > I've read related chapters of Amir's PhD thesis.
> > What's the purpose of the state SEG and
> > I am confused by some terms, such as
> > POTENTIAL_REP,SEG_REP,RING_REP, conf leader, seg
> > leader.
> > Thanks.
> > Kevin
> > __________________________________
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> Ryan W. Caudy
> Center for Networking and Distributed Systems
> Department of Computer Science
> Johns Hopkins University
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