dhis2-devs team mailing list archive

[Jason Pickering <jason.p.pickering@xxxxxxxxx>]

Hi Uwe,

Are you importing this as aggregate data or as events?

Regards,
Jason


On Wed, Jun 8, 2016 at 2:27 AM, Morten Olav Hansen <morten@xxxxxxxxx> wrote:

> Just to make sure, we are talking about the same thing: the problem does
>> not
>> appear during import, but when generating of all possible combinations
>> (when
>> saving the CategoryCombination or when manually evoking the update of
>> categoryOptionCombinations)
>>
>
> Ah, sorry.. I was thinking it was the import that was slow.. so that part
> is ok?
>
>
>> so I can still use /api/metadata without version to call the current
>> api-version?
>>
>
> That will give you the legacy importer, so going forward you would need to
> use /api/{version}/{endpoint}, we will have more
> info about it in the release notes.
>
> And no, the UI is not switched to new importer yet (in 2.24), not 100% it
> will...
>
>
>>
>> Thanks for your replies at this time of the day :-)
>>
>> Regards, Uwe
>>
>> ---
>>
>>
>> > Morten Olav Hansen <morten@xxxxxxxxx> hat am 7. Juni 2016 um 19:28
>> > geschrieben:
>> >
>> >
>> > Hi Uwe
>> >
>> > The improvements are mainly for speed and validation. Yes, we are now
>> (in
>> > 2.24) introducing versioned web-api, so that endpoint importer will be
>> > available until 2.26 (we will support 3 versions). In 2.24, the same
>> > endpoint is available at /api/24/metadata.
>> >
>> > If you are using cURL, or another utility.. the import part would be the
>> > same, but the UI in 2.23 can not be used, as it's hardcoded to legacy
>> > importer.
>> >
>> > --
>> > Morten Olav Hansen
>> > Senior Engineer, DHIS 2
>> > University of Oslo
>> > http://www.dhis2.org
>> >
>> > On Tue, Jun 7, 2016 at 11:25 PM, Uwe Wahser <uwe@xxxxxxxxx> wrote:
>> >
>> > > Hi Morten,
>> > >
>> > > no, i didn't. What would be the procedure for that? Importing
>> Categories,
>> > > Options and CategoryCombinations via api and having DHIS2 generate the
>> > > CategoryOptionCombinations? Would that bring about any change at all
>> or
>> > > does the
>> > > importer use different libs for generating the COCs?
>> > >
>> > > btw. is the 23 in the api link valid for future dhis2 versions? I
>> noticed
>> > > it in
>> > > a few api descriptions recently ...
>> > >
>> > > Regards, Uwe
>> > >
>> > > > Morten Olav Hansen <morten@xxxxxxxxx> hat am 7. Juni 2016 um 18:50
>> > > > geschrieben:
>> > > >
>> > > >
>> > > > Hi Uwe
>> > > >
>> > > > Did you try out new importer? Available as /api/23/metadata in 2.23
>> > > >
>> > > > On Tuesday, 7 June 2016, Uwe Wahser <uwe@xxxxxxxxx> wrote:
>> > > >
>> > > > > Dear devs,
>> > > > >
>> > > > > I am experiencing problems when handling category combinations.
>> Our
>> > > > > protoype
>> > > > > with 5 dimensions went through the process of generating
>> > > > > categoryOptionCombinations (~20.000 records) quite well. 7
>> dimensions
>> > > > > (~400.000)
>> > > > > worked as well, although it took a very long time.
>> > > > >
>> > > > > Now we defined the next datamodel with 10 dimensions (expecting
>> ~5Mio
>> > > > > categoryOptionCombinations) and the process dies without further
>> > > notice.
>> > > > > Last
>> > > > > words in catalina.out:
>> > > > > * INFO  2016-06-07 13:29:33,783 Building object-bridge maps
>> > > (preheatCache:
>> > > > > true,
>> > > > > 3 classes). (DefaultObjectBridge.java [http-bio-8180-exec-15])
>> > > > > * INFO  2016-06-07 13:29:36,779 Building object-bridge maps took
>> 2.99
>> > > > > seconds.
>> > > > > (DefaultObjectBridge.java [http-bio-8180-exec-15])
>> > > > > * INFO  2016-06-07 13:29:36,896 'admin' update
>> > > > > org.hisp.dhis.dataelement.DataElementCategoryCombo, name:
>> Membership,
>> > > uid:
>> > > > > SCgLXYHqVzz (AuditLogUtil.java [http-bio-8180-exec-15])
>> > > > >
>> > > > > Ten dimensions with not extraordinarily big option sets is
>> actually not
>> > > > > unusual
>> > > > > and rather slim for multi-dimensional data-models in data
>> warehouses,
>> > > so
>> > > > > I'd
>> > > > > expect DHIS2 to be able to handle this easily.
>> > > > >
>> > > > > Could of course be a memory problem (tried up to 14g for tomcat
>> on a
>> > > 4-core
>> > > > > Ubuntu 14.04 server, DHIS 2.23) Before I'll start experimenting
>> with
>> > > other
>> > > > > parameters, I am hoping to get some hints on known limitations or
>> > > > > workarounds
>> > > > > from you (not allowed: reducing the number of options or
>> categories,
>> > > > > sql-hacks
>> > > > > :-) ). Is there any info on whether optimizations on this process
>> are
>> > > being
>> > > > > planned in the kernel?
>> > > > >
>> > > > > Some observations on the process:
>> > > > >
>> > > > > * during generation (either when saving the categoryCombination
>> or in
>> > > the
>> > > > > data
>> > > > > maintenance menu):
>> > > > > - long names - cOCs are generated with generated names that are
>> getting
>> > > > > extremely long as they are mere concats of the involved
>> > > categoryOptions.
>> > > > > Could
>> > > > > there be an option to just use the codes as basis or to leave
>> away the
>> > > > > names
>> > > > > completely? Could be one reason for a memory problem and
>> performance
>> > > > > issues.
>> > > > > - long log entries - every single entry is logged in catalina.out
>> with
>> > > > > several
>> > > > > lines of text, causing catalina to become extremely big.
>> > > > > - during execution lots of Java-memory are being used and no
>> DB-memory,
>> > > > > which
>> > > > > looks to me as if all the logic is happening in the java machine.
>> It
>> > > might
>> > > > > be
>> > > > > more usefull to transfer more logic into SQLs to the DB (e.g. use
>> DB
>> > > > > cross-joins
>> > > > > for combining options) as the DB will be more efficient.
>> > > > > - because of the log entries I assume that every single
>> combination is
>> > > > > being
>> > > > > persisted into the DB with a single SQL statement, causing
>> millions of
>> > > > > single
>> > > > > SQL requests. Prefer batch SQL instead of single record
>> processing.
>> > > > >
>> > > > > * during import/export of categoryOptionCombinations:
>> > > > > - prefer batch SQL instead of single record processing
>> > > > > - huge log entries in catalina.out due to several lines of text
>> per
>> > > > > combination
>> > > > >
>> > > > > I'd be very happy about comments.
>> > > > >
>> > > > > Thanks in advance,
>> > > > >
>> > > > > Uwe
>> > > > >
>> > > > > _______________________________________________
>> > > > > Mailing list: https://launchpad.net/~dhis2-users
>> > > > > Post to     : dhis2-users@xxxxxxxxxxxxxxxxxxx <javascript:;>
>> > > > > Unsubscribe : https://launchpad.net/~dhis2-users
>> > > > > More help   : https://help.launchpad.net/ListHelp
>> > > > >
>> > > >
>> > > >
>> > > > --
>> > > > --
>> > > > Morten Olav Hansen
>> > > > Senior Engineer, DHIS 2
>> > > > University of Oslo
>> > > > http://www.dhis2.org
>> > >
>>
>
>
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>


-- 
Jason P. Pickering
email: jason.p.pickering@xxxxxxxxx
tel:+46764147049