hello,
i know cpanel support backup feature,
now,i hope my cpanel server can auto backup everyday and save the entire week 7 days,
and user can download their backup from their cpanel directly,
is it possible?
thanks

You can setup auto-back from your WHM for daily, weekly and monthly backups.
However those backups are usually stored on /backup (which should be your backup drive) and are not directly accessable to your users.
You can restore then from the Backup Restore option under WHM.
If a client needs to download backup, he should make his own backups from cPanel. However it does not support auto-backups.

We have reseller accounts on a hosting company. They get backup as daily and weekly. We can download daily or weekly backup files separately from Cpanel.

Yes, in cpanel there is an option to create backup of their own by the users.

One word of warning - cPanel's built in backup feature is very inefficient and not suited for daily backups, and especially not if you have more than around 10MB of data on the account. The backup process creates a lot of CPU load and disk I/O and the server will become very slow while the backup is being done.
If your disk quotas are anything up to modern standards, you may want to look into alternate ways of providing backup solutions instead.

One word of warning - cPanel's built in backup feature is very inefficient and not suited for daily backups, and especially not if you have more than around 10MB of data on the account. The backup process creates a lot of CPU load and disk I/O and the server will become very slow while the backup is being done.
If your disk quotas are anything up to modern standards, you may want to look into alternate ways of providing backup solutions instead.
I agree with you on that. It might not make the server slow if it's running 15,000rpm scsi drives in raid-10. Of course the CPU usage will still by pretty high regardless.
cPanel's system also does not store previous backups.
I would highly recommend looking at R1Soft if you're looking to store multiple restore points and also hoping to have low load. It's worked great for us in backing up even the largest of accounts. It also provides integration with cPanel for files so users may restore files themselves.

One word of warning - cPanel's built in backup feature is very inefficient and not suited for daily backups, and especially not if you have more than around 10MB of data on the account. The backup process creates a lot of CPU load and disk I/O and the server will become very slow while the backup is being done.
If your disk quotas are anything up to modern standards, you may want to look into alternate ways of providing backup solutions instead.
I face this problem too. I try to backup some large/huge sites and the result is, the sites being unavailable while backup is taking place. Is there any way to take a safe backup, even if it takes longer to complete, without making the site unavailable during the process?

Having the same problem michael id love to know, A few times ive even had cpanel backup fail from running too long.

I face this problem too. I try to backup some large/huge sites and the result is, the sites being unavailable while backup is taking place. Is there any way to take a safe backup, even if it takes longer to complete, without making the site unavailable during the process?
You can set the best time at cron.
Also, did you check incremental backups? They work much better.

The cpanel backup system is just bad when you have anything over 50gb of space to back up. It's slow uses a ton of IO. I don't blame cpanel however.
If your serious invest in R1soft. We've got it deployed it's bloody excellent.

Is it the same if I export the database from phpmyadmin?