[Handle-info] how to mirror multiple sites with a single secondary handle server?

[Eric Auer <eric.auer@mpi.nl>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


Hi all,

we would like to mirror several sites with one
single server. To be more exact, we would like
to keep open ports in our firewall at a minimum.

One idea on how to do this, please comment:
We could install 3 servers to mirror 2 sites...
One server would be set to "normal server with
read only access". The other 2 would be set to
"you are a mirror of prefix A" and "you are a
mirror of prefix B". All 3 servers would share
the same SQL database but only the "normal"
server would be accessible from the outside.

The global handle servers would list that one
server as the "actual" mirror for both sites /
prefixed. I assume that mirroring is a "pull"
process so no connections from the outside to
the 2 "fetch data" servers would be needed.
All 3 would use the same public/private keys.

The 2 mirrors would use "tuned" config.dct to
hide the respective other prefixed from each
other or at least avoid interference when they
both write to the same database (which is then
read by the 3rd, read-only server). This would
affect delete_all_handles_stmt and maybe also
scan_nas_stmt/scan_handles_stmt, anything else?

I looked at ReplicationDaemon, at TxnCallback
and at DumpHandlesResponse. It seems that having
a secondary / mirror replicate more than one
server is only supported without trickery if all
primary servers are from the same site? Or is
it possible to "tune" some config / site info
file to tell a mirror to mirror 2 actual sites?
txnsrcsv.bin maybe?

Please let me know if you think this can work,
and if you have further suggestions. It would
be nice if we could avoid having to modify the
source code or having to open many ports when
we mirror many sites.

Thanks :-)

Eric


-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)
Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org

iD8DBQFHE00o99dkROyhRRsRAnPlAJwLYXMB1SQ6DUcSk64gGoB3ZSDLUgCcDDwz
1nVxzu3TslQR8zAqgUZRug8=
=IMG3
-----END PGP SIGNATURE-----


_______________________________________________
Handle-Info mailing list
Handle-Info@cnri.reston.va.us
http://www.handle.net/mailman/listinfo/handle-info