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Cross country networks, and data replication... Questions... :-)

  • From: Gabriel
  • Date: Thu Jan 16 18:48:54 2003


Hello all.

--- Where we are ---

Currently, I've got a single site, colocated on the East Coast. Currently, I've got two NetApps at that site, one serving as a mailspool, the other serving as a location for web documents. This system works via NFS to a fair number of mail and web servers, and it's running happily.

--- Where I'm going ---

What I seek is some help on implementing a second site, and the link between the two. The sites will be more or less the same in terms of the equipment in them, or so I hope.

I want to be able to have the changes made at one site replicated to the other site transparently. That is, if I update a file at site A, I want to be able to see the changes at Site B in a reasonable period of time (i.e., short), and without having to manually move data around. I specifically want to do this for allow both sites to offer the same mailspool, so that customers can check their mail at either site.

I am in the planning phase of bringing up a second site, and at this
site, there will be more web servers, and more mail servers. There will
also be an additional netapp for each of mail and www.

Between the pair of mail netapps (and to a lesser degree, the www
netapps), I want them to replicate changes to the other one. That is,
if a file is removed on Mail.NetApp A, it should also disappear on
Mail.NetApp B. And if a file is created on netapp B, it should also
come into existance on netapp A. Bidirectional updates.

My current setup consists of Linux and FreeBSD systems, and F740 NetApps.

And yes, there is a lot of pressure to stay with the NetApps.

Any hints, or advice will be much appreciated.

Thanks in advance,
Gabriel



--
Gabriel Cain www.dialupusa.net
Unix Systems Administrator [email protected]
Dialup USA, Inc. 888-460-2286 ext 208
"Your Virtual ISP Solution"

"The most difficult thing in the world is to know how to do
a thing and to watch someone else do it wrong without comment."
-- Theodore H. White