The meaningful of Cache refresh

[Defu Jia]

Hi guys,I wanna know the meaningful of these options,and what is the diffence between workspace cache duration and check cache every?And I wanna know that when we change data what is the time for the data transfer to data lake?

[Tina Ling]

Hi @Ollie Guan , @Defu Jia ,

Data freshness and dashboard refresh or cache are 2 separate things.  

Data freshness is how long it takes for your product change to get reflected in the datalake.  Dashboard cache or refresh is how often you want the dashboard to re-run the query. 

If you make a change in product at 2pm and another change at 2:30pm, it takes 1 hour for the change to get updated in data lake, and you run the dashboard at 3:10pm, then you will see the change made at 2 pm.  However, it you keep your dashboard catch duration at 1 hour, and you run it again at 3:40, you will not see the change from 2:30pm, because the dashboard will not re-run the query, even though the data in the lake has already captured the change. 

Hope this helps. 

[Ollie Guan]

Hi Tina,

Have a nice weekend! Thanks for your reply ^_^

Based on the maximum refresh cycle of the data lake is 6 hours. If I set the dashboard cache to update every 1 hour, I should see the updated data after 8 hours at most, right?

[Ollie Guan]

@Tina Ling @Claire Gayrard 

The inconsistency of data refresh cycle in Data Lake and Dashboard settings has caused us confusion. How long do we have to wait to get a dashboard with all the updated data?

https://support.atlassian.com/analytics/docs/understand-the-data-model-of-the-atlassian-data-lake/

https://support.atlassian.com/analytics/docs/dashboard-settings/

[Ollie Guan]

How can we get the proper date and time when was chart got updated and some cases even thought data chart updated but data not coming.

https://jira.atlassian.com/browse/ANALYTICS-154

https://jira.atlassian.com/browse/ANALYTICS-273