[Loris-dev] LORIS - Limit on number of visit labels?

Tue Jul 26 11:06:44 EDT 2022

Hi Alfredo,

There are no hard limits on visit labels. However, as Rida said I'm unaware
of any studies using that many visit labels, so it's possible there would
be performance or GUI issues that aren't known about. (In particular,
dropdowns for menu filters or the DQT seem like they're probably the most
likely places to have issues.)

On Mon, Jul 25, 2022 at 3:11 PM Morales Pinzon, Alfredo <
AMORALESPINZON at bwh.harvard.edu> wrote:

> Hi Cécile,
>
> Just following up on the creation of thousands of “visit labels” in LORIS.
> Just want to confirm that there are not hard limits on this before we move
> forward with the insertion.
>
> Best,
> Alfredo.
>
> On Jul 19, 2022, at 3:17 PM, Morales Pinzon, Alfredo <
> AMORALESPINZON at BWH.HARVARD.EDU> wrote:
>
> Hi Cécile,
>
> Thank you so much for looking into this. We actually have more 50k visits
> already uploaded into LORIS, however we have used a set of 333 “visit
> labels”:
>
> mysql> select count(*) from visit;
> +----------+
> | count(*) |
> +----------+
> |      333 |
> +----------+
>
> Now we would like to create thousands of “visit labels” to upload more
> visits. Apparently it should be fine but we would like to be sure that
> LORIS can handle them without any issues. I can recall that at some point
> there was a limitation on the number of centers that could be handle, witch
> was about 512 but got fixed. We just want to double check with the LORIS
> DevTeam that there are no limitations on this.
>
> Best regards,
> Alfredo.
>
> On Jul 19, 2022, at 8:31 AM, Cecile Madjar <cecile.madjar at mcin.ca> wrote:
>
>         External Email - Use Caution
>
> Hi Alfredo,
>
> I just looked into the number of visits of a longitudinal project we have.
> Currently, they have 8698 visits in the session table and everything works
> well. I believe they are now 10 years after baseline as well (although the
> pandemic reduced a little bit the number of visits during 2020 for the
> project as you can imagine).
>
> Based on this, I would not expect any major issues.
>
> Hope this helps,
>
> Cécile
>
>
> On Tue, Jul 19, 2022 at 7:52 AM Rida Abou-Haidar <rida.abou-haidar at mcin.ca>
> wrote:
>
>> Hi Alfredo,
>>
>> I don't know of any limits or reasons why thousands of visits would be a
>> problem. However I also don't know of any projects handling that many
>> visits. I will run it by the LORIS team at our meeting today and see if
>> anyone has more accurate information.
>>
>> Best,
>> Rida Abou-Haidar
>> Software Developer
>> Montreal Neurological Institute
>> McGill University
>> rida.abou-haidar at mcin.ca
>>
>>
>> On Mon, Jul 18, 2022 at 4:18 PM Morales Pinzon, Alfredo <
>> AMORALESPINZON at bwh.harvard.edu> wrote:
>>
>>> Dear LorisDev Team,
>>>
>>> We are planning on adding visit labels in days, for instance the visit
>>> label “d3650" will correspond to a visit 10 years after baseline. This will
>>> imply the creation of thousands of visits, is there a limit on the number
>>> of visits that can be added to LORIS? This is required for a retrospective
>>> study that we are going to upload into LORIS.
>>>
>>> Best regards,
>>> Alfredo.
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