2020 February, 5 Tech Committee Meeting notes

Date

05 Feb 2020

7am PST / 4pm CEST

Time	Item	Who	Notes
5m	Agenda and action item review	Josh Zamor
?	Performance Goals	Wesley Brown / Sebastian Brudziński	What should they be? How to get to them?
20m (next time)	Managing the infrastructure/tech stack	Sebastian Brudziński	What can we do to reduce the time spent fixing/working on the infrastructure and our tech stack in general Jenkins upgrades Jenkins problems - random errors/running out of disk space Jenkins falls down sometimes and needs manual starting Performance tests with MW dataset (quite some manual work to get it loaded to perftest and then restore the original one) Deployment problems - Docker certs expiring (the need to re-provision) Functional tests unstable Performance tests unstable more?
20m	New batch endpoints	Mateusz Kwiatkowski	SELV Requisition district batch approval endpoint (WIP)
10m	Technical Committee call schedule	Josh Zamor	Poll results: https://forum.openlmis.org/t/technical-committee-meetings-in-2020/5431

Last release (3.7) started perf discussions, wanted improvements in 3.8 (which did focus on perf with 3 dev sprints)
3.8 summary:
- Did improve results with huge amount of products (10k products)
- Not as much improvement with fewer products (1k products)
- Overall stakeholders unhappy with improvement
What should they be?
- how big?
- times?
  - 500 ms is set for endpoints, however there's doubt that's achievable for some.
  - We've spent a lot of time on endpoint performance, however we should spend more focus on apparent performance on pages
  - We should get more realistic on perf characteristics on other measures such as <first display, Time Till Interactive>, TTFB
    - We've done some of this in the manual testing
How to get them?
- Caching in UI has helped in the UI (with versioning),
- Caching in the UI improvements was lost due to additional data needed
- We've maybe achieved all the low-hanging fruit, next step for big improvements would be an infra change (caching microservice level, json normalization - normalization as in data repeated in response): would need experimentation to find if the approach would help
  - Have a shared dictionary on products - we did achieve this in that a requisition now doesn't include full product data, but rather it
  - One idea: could pre-load dict, however a user may not need all products - we would need to get a pattern for loading a slice of the dictionary

Forum topic:

New Batch Endpoints

Klaudia Pałkowska (Deactivated): one-page design document for how core supports batch requisitions (endpoints Requisitions has now, endpoints being proposed, how the fit and work together). Goal is to support a reasonable base in OpenLMIS that many implementations will reasonable use and build off of.
Josh Zamor to start the performance discussion in the forum: summary, themes, call for next steps