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Re: NFS-shared LMDB?

Quanah Gibson-Mount wrote:
--On Tuesday, July 09, 2013 1:25 PM -0700 Howard Chu <hyc@symas.com> wrote:

So the downside would be single point of failure for writes? I.e., if the
system with the slapd configured for doing writes went down due to
hardware or power issues, you'd need to configure one of the other
slapds to accept writes, and then update all the clients to use that

Yes. We could do this fairly transparently using something like the
chaining overlay. Have it identically configured on all servers, with a
prioritized list of write masters. (Could do this to make mirrormode
easier to setup too.) If the current node is the write master, allow
write ops thru, otherwise chain them to the current write master. Then
clients can send ops to any server they want.

Sounds cool to me. :)

We should probably overhaul the connection manager and threadpool before this, otherwise chaining overhead will be too bad.

  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/