Re: Syncrepl: why would this happen?

[Howard Chu <hyc@symas.com>]

Lesley Walker wrote:
> Running 2.3.32 with the patch for added sync logging, I got this message:
>
> Jan 15 18:51:14 wwsv04 slapd[7879]: Entry
> uid=example,ou=example,dc=example,dc=co,dc=nz CSN
> 20070115055002Z#000000#00#000000 greater than snapshot
> 20070115051233Z#000001#00#000000
>
> This particular record gets an update every hour at *:51, but the message
> has only appeared once so far, and this version has been running since
> Friday.
>
> It seems perfectly reasonable that the CSN with the later timestamp is
> greater than the earlier one, so why is it telling me this?
>
> This is on the provider, which in turn gets its updates from the master
> server via slurpd. (a temporary measure until we can upgrade the master
> server)
This doesn't indicate any particular problem. In order to make sure the 
consumer gets a consistent update, the provider takes a snapshot of its CSN 
at the moment the consumer contacts it. Only changes made between the 
consumer's CSN and the snapshot get sent to the consumer on that particular 
update. Any changes that occur during the time the updates are being sent 
will be deferred to a future session. This is all normal behavior.

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