Grouper Developers Forum

[Niels van Dijk <>]

Hi Chris,

The question was just to get some rough idea on what to expect. We
@SURFnet are looking at something like 60k users an 12k groups. The
number of memberships is as yet unknown. We will do some performance
testing on initial loading as well as try to mimic day-to-day usage.
Should we run into problems, I'll be back on this list ;)

regards,
Niels

Chris Hyzer wrote:
> Btw, the loader could be tuned to be more efficient, though it seems like 
> it has acceptable performance at the moment...  right now there is one 
> query which is run to load the data.  If it is a simple loader job, or a 
> group list job, there is only one query.  Then for each group managed (for 
> a simple job, it is one group, or a group list, it is many groups), there 
> is one query to list all current members in the registry (note, Im not sure 
> if subjects are resolved, I hope not).  The two lists are reconciled, and 
> any inserts or deletes are performed.
> 
> For group list jobs, I think it would make it much faster if there was one 
> query against the registry to get the memberships of all groups in the list.
> 
> I think we are ok with holding everything in memory (e.g. for Penn's org 
> list, that would be 28k subjectId's and group names).  That should be 3 
> megs of data (less depending on java String pooling).  That doesn't seem 
> unreasonable.  However, I could picture ordering the query by group name 
> and subject id, and cycling through the results in order without having to 
> bring everything into memory... 
> 
> Another optimization could be, if the db connection of the loader job is 
> the same as the grouper registry (including if you use a dblink), I could 
> picture joining to the registry so that query would return the inserts and 
> deletes only (or two queries, one for inserts, one for delete, if one 
> doesn't work out)
> 
> We should profile the loader to make sure we get the right bottlenecks 
> though... :)  If anyone has thoughts or concerns please let me know.
> 
> Thanks,
> Chris
> 
>> -----Original Message-----
>> From: Niels van Dijk 
>> [mailto:]
>> Sent: Friday, May 22, 2009 3:36 AM
>> To: Chris Hyzer
>> Cc: Grouper Users Mailing List; 
>> 
>> Subject: Re: [grouper-users] Penn's organizational hierarchy
>>
>> Hello Chris,
>>
>> Thanks for the interesting document . Are you able to tell something
>> about the performance of grouper in the setup you describe?
>>
>> thanks in advance,
>> Regards,
>>
>> Niels
>>
>> Chris Hyzer wrote:
>>> Hey,
>>>
>>> I implemented the Grouper org hook at Penn.  I have permission to
>> share my experience outside of Penn so I made a document here:
>>>
>> https://wiki.internet2.edu/confluence/display/GrouperWG/Penn+organizati
>> onal+hierarchy
>>> This is the size of our org implementation:
>>>
>>>  27,000 people in orgs at Penn
>>>   2,200 orgs
>>>   3,000 org groups (more due to include/exclude lists)
>>> 500,000 org memberships (there are a lot due to the rollups, and
>> include/exclude lists)
>>> Note that the bulk of the work was in figuring out how our org data
>> is structured, and how I can expose it in views to something that the
>> loader can process.  If you want to get this working at your
>> institution this document should be helpful.
>>> Btw, Loris, does this help with your org issues?
>>>
>>> Thanks,
>>> Chris
>> --
>> Niels van Dijk
>> Advanced Services
>>
>> T: +31 302 305 337 / M: +31 651 347 657
>> SURFnet - PO Box 19035 - NL-3501 DA Utrecht - The Netherlands -
>>
>> http://www.surfnet.nl
>> SURFnet grensverleggend netwerk voor hoger onderwijs en onderzoek

-- 
Niels van Dijk
Advanced Services

T: +31 302 305 337 / M: +31 651 347 657
SURFnet - PO Box 19035 - NL-3501 DA Utrecht - The Netherlands -

http://www.surfnet.nl
SURFnet grensverleggend netwerk voor hoger onderwijs en onderzoek