I want to send mails on daily basis at 00:00 am using task queue, i can store a mail in a queue for 30 days at most. Now to make a task queue run do i need a corn job for it. Or the app engine will itself make the task run by itself.
And can i add a particular time for task queue to run like the corn job.
The App Engine Cron Service allows you to configure regularly
scheduled tasks that operate at defined times or regular intervals.
These tasks are commonly known as cron jobs. These cron jobs are
automatically triggered by the App Engine Cron Service. For instance,
you might use this to send out a report email on a daily basis, to
update some cached data every 10 minutes, or to update some summary
information once an hour.
A cron.yaml file in the root directory of your application (alongside
app.yaml) configures scheduled tasks for your Python application. The
following is an example cron.yaml file:
cron:
- description: daily summary job
url: /tasks/summary
schedule: every 24 hours
- description: monday morning mailout
url: /mail/weekly
schedule: every monday 09:00
timezone: Australia/NSW
- description: new daily summary job
url: /tasks/summary
schedule: every 24 hours
target: beta
https://cloud.google.com/appengine/docs/python/config/cron
Related
We have multiple App Engine Cron entries triggering our App Engine application, but recently we detected a decrease on the number of the processed events handled by one of the endpoints of our application. By looking at the App Engine Cron logs for this specific Cron entry on StackDriver, we found out that, during the days we invesgated (March 11-15), that are missing entries. Most of the missing triggers coincide through the days (12:15, 14:15, 16:15, 18:15, 20:15, 22:15, 00:15).
The screenshot below displays one specific day, and the red lines indicate the missing entries:
There are no requests with HTTP status code different than 200.
This is the configuration of the specific Cron entry (replaced some words with XXX due to business restrictions):
- description: 'Hourly job for XXX'
url: /schedule/bigquery/XXX
schedule: every 1 hours from 00:15 to 23:15
timezone: UTC
target: XXX
retry_parameters:
min_backoff_seconds: 2.5
max_doublings: 5
Could someone # GCP side take a look? The task name is 53751dd6a70fb9af38f49993b122b79f.
it seems like if the request takes longer than an hour, then the next one gets skipped (i.e. cron doesn't launch the next iteration if the current iteration is still running)
maybe do the actual work in a separate task and then the only thing the cron task does is launch this separate task
When setting up a Google App Engine instance you can configure a cron.yaml to set up Cron jobs.
There does not seem to be any documentation on how to configure jobs that run say every 30 seconds.
I tried
schedule: every 30 seconds
and
schedule: 0/30 0 0 ? * * *
But no good. Google Cloud tells me the format is incorrect when I deploy. Can you schedule in frequencies less then 1 minute with Google App Engine Cron jobs?
You cannot configure GAE cron services with resolutions below 1 minute. FWIW, you can't do that on unix/linux systems either.
But it is possible to use an every 1 minutes cron job from which you can further trigger delayed execution of deferred/push/pull queue tasks with down to 1 second resolution, see High frequency data refresh with Google App Engine
Had the same problem, solved with setTimeout().
Using setTimeout for 30 seconds inside the appengine one-minute cron job did the trick, in this case we'll be fetching data 2 times per minute that is every 30 seconds.
saveData();
setTimeout(function () { saveData(); }, 30000);
Tested and worked fine,
I need create a schedule job, i am using Google App engine.
The requirement is the cron job will be execute each 10 minutes like this
0,10,20,30,40,50,60 in each hour.
I read the documentation from Google site at : [https://cloud.google.com/appengine/docs/standard/php/config/cronref#schedule_format][1]
This is my config :
schedule: every 10 minutes from 00:00 to 23:50
Is it correct with the requirment ?
Yes, correct. But, if you are covering the entire day, just:
schedule: every 10 minutes
I want to run a cron for every 2 minutes interval, 0,2,4,6,8 .... each cron execution runs for 2 minutes.
I configured cron schedule with synchronized as below. But I still see scheduler is behaving as if synchronized not given.
Crons are scheduled at
0-2 First cron
4-6 Second cron
8-10 third cron
Cron scheduler is waiting for 2 minutes after last cron execution.
If I understand synchronized correctly, it is added to avoid this behavior.
Why this happening.
<cron>
<url>/cron/syncPrices</url>
<description>Fetch data from source and cache it in data store.</description>
<schedule>every 2 minutes synchronized</schedule>
</cron>
You can check the actual cron configuration for your application on the old GAE console in the Cron Jobs menu on the left. You're looking to confirm if synchronized (or its from 00:00 to 23:59 equivalent) is present for the respective job:
if synchronized is missing it's possible that the cron.yaml file wasn't uploaded/updated during the regular app upload - I noticed this to be the case with my multi-module (python) application. You have to specifically update the cron configuration using the update_cron option of your AppCfg utility.
if synchronized is indeed present and the unexpected behaviour continues you should open a support case with Google.
FYI It looks like 'synchronized' is no longer part of the cron.yaml documentation. I've reached out to Google via the documentation feedback link.
From gae document, I can set up the schedule in cron.yaml file as below :
every 5 minutes from 10:00 to 14:00
but when user wants to change start time and finish time, how can he do it through web interface?
It's currently not possible. You can configure it only via configuration files like cron.yaml for python or cron.xml for Java.