On Mon, 23 Nov 2015 12:25:36 +0000 Howard Chu wrote: > Bannister, Mark wrote: > >>> --On Friday, November 20, 2015 6:31 PM +0000 Albert Braden > >>> <[email protected]> wrote: > >> > >>> Hi Quanah, > >>> > >>> Are you sure your issues with syncrepl aren't specific to Zimbra? When > >>> I ran the Zimbra at Homestead/Intuit we saw syncrepl issues, but I > >>> have not seen those issues in non-Zimbra LDAP clusters. > >> > >> Quite certain. For one thing, I file very few syncrepl related ITSes, > >> since I don't use it, but many are filed... For another, while I have > >> encountered a very few issues with delta-syncrepl, the majority of > >> issues I find w/ Zimbra and replication are related to syncrepl when it > >> has to be used in an initial or fallback scenario. > > > > What sort of issues? > > > >> And here's some quick stats: > >> $ grep syncrepl CHANGES | grep -v delta | wc -l > >> 76 > >> > >> $ grep delta-syncrepl CHANGES | wc -l > >> 7 > >> > >> Or syncrepl has had 10x times the issues. > > > > Or syncrepl has 10x the users, more eyes spot more bugs, and is now more > > stable because it has had more fixes? I'm just speculating here, but I > > wouldn't be more confident in product Y because it is mentioned less in > > the change log than product X. > > > > However, this is a tangent, and still does not help me with my original > > question. Correct me if I'm wrong, but delta-syncrepl is also going to > > be running in a serial fashion on the master server, and so, if I'm > > replicating out to hundreds of replicas, high network latency or timeouts > > on a single replica would still have a big impact on my ability to > > replicate everywhere within 5 minutes. > > > > Syncrepl/delta-syncrepl doesn't make a difference here. Unless someone > > has a better suggestion, as I don't suppose OpenLDAP is going to be fixed > > to do this in parallel anytime soon, I will go ahead and launch multiple > > replica processes on the master server as I proposed at the beginning of > > the thread, and then balance the load across these processes to reduce > > the impact of any one replica going slow. > > Certainly won't be changing in 2.4. Very likely to change in 2.5. > > https://www.openldap.org/its/index.cgi/Incoming?id=8227 > > > (Or investigate other directory server products that can replicate in > > parallel ...) > > Have fun investigating.
I don't know if this is of any use to anyone. There doesn't seem to be a whole lot of information available. <https://technet.microsoft.com/en-us/library/cc755994%28v=ws.10%29.aspx?f=255&MSPPError=-2147217396> -- Jerry
