Grouper Users - Open Discussion List

[Dave Churchley <>]

Thanks for the tips, Robert. I'd like to a pose a follow-up question to 
anyone in the community (particularly anyone using PSP to provision to AD) 
about expectations.

Looking in grouper_error.log suggests that each 
PspChangeLogConsumer.processChangeLogEntry takes about 2 seconds "Elapsed 
time" and, when we tried it, a bulkSync took about a fortnight. What kind of 
performance should we expect to be able to achieve? 

I appreciate this is probably dependent upon environment. We're running 
Grouper 2.2.2 and, from Grouper Report, we have:
memberships:           969,308
groups:                16,068
members:               79,796
folders:               950

Thanks
Dave


>-----Original Message-----
>From: 
>
> [
>]
> On Behalf Of Robert Bradley
>Sent: 16 August 2017 17:48
>To: 
>
>Subject: Re: [grouper-users] Large number of changes and provisioning
>
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>Hash: SHA256
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>On 16/08/17 16:52, Dave Churchley wrote:
>> Seems like a great idea to me. I hope you don’t mind me asking an
>> off-topic (but definitely related) question…
>>
>> We’ve suffered from similar backlogs with PSP when there have been
>> large membership changes. The first thing that struck me about your
>> solution, however, was that you said your bulkSync takes half an
>> hour. For us it takes about 2 weeks! For this reason, we never do a
>> bulkSync and rely on PSP incremental provisioning to AD so when we
>> get a backlog we just have to live with it.
>>
>> We’re on v2.2 using PSP to provision to AD. Since we started using
>> PSP we’ve found it to be quite slow but, under normal load, it
>> copes pretty well and updates AD in about a minute. We do
>> occasionally suffer provisioning backlogs though. We know there’s a
>> big one on the horizon at the end of the month, as our academic
>> year switches over. Last year we had a backlog for about 2 weeks.
>>
>> Does anyone have any suggestions that might help us out? We’ve
>> recently been testing PSPNG on v2.3 but it doesn’t appear to be
>> quite production-ready for our needs yet.
>>
>
>Things I'd suggest from personal experience are:
>
>1. Run the bulk sync after setting the following in
>grouper-loader.properties:
>
>changeLog.psp.fullSync.omitDiffResponses = true
>changeLog.psp.fullSync.omitSyncResponses = true
>
>and setting logSpml="false" in psp-services.xml (within the <Service
>... /> tags).  These shouldn't directly affect performance, but does
>reduce memory pressure and the GC overheads caused by it.  If you can
>increase the JVM -Xmx and -Xms parameters fairly easily, I'd recommend
>doing that as well.
>
>2.
>
>Increasing caching in ehcache.xml (both TTL and number of entries) can
>help a lot by reducing round trips to your subject sources (AD?).
>
>I'd also check the LDAP indexing of any subject or provisioned
>attributes.  In OpenLDAP terms, you'd ideally want "pres,eq" indexes
>for attributes that aren't used by the Subject API search, and
>"pres,sub,eq" indexes for those that are searchable.  I'm assuming
>that AD has similar index controls, but lack the experience with AD to
>comment.
>
>
>- --
>Dr Robert Bradley
>Identity and Access Management Team, IT Services, University of Oxford
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