hello,
on one of my pc , i don't have regularly an internet conection , so I would like to know if there is any way to download a maximum of tasks like 10-20 to be ready to run ?

I only have 2 tasks maximum ready to be crunched not more.
best regards

At your account at one of your projects, enter the computing preferences. Under Network usage, fill in the amount of days between your connecting to the Internet:

Computer is connected to the Internet about every  --- days 
(Leave blank or 0 if always connected. 
BOINC will try to maintain at least this much work.)

After you click the Update button in BOINC manager's Projects tab, BOINC should download enough tasks to last for that time (as stated in the preferences).

If that's not enough for you, you could additionally tell BOINC to

Maintain enough work for an additional --- days

Don't raise the value too fast. Try daily increments at maximum.

Gruß,
Gundolf

PS: If you are using local preferences from BOINC manager's Advanced menu, you'll have to set the values there, since the local preferences override the online ones.

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Computer sind nicht alles im Leben. (Kleiner Scherz)

Thank you for this answer, it's working perfectly now .