I have a server where home folder (where all the sites are) is about 50GB in size, /var/log is around 25GB (I have to keep a lot of logs) and /backup folder is also around 25GB.
Server currently has around 80GB of free space on the disk, backup type is set to incremental and it is kept for 3 days.
My problem is that when this backup is in progress, home folder begins to grow and eventually becomes twice as large (100+ GB), as the backup process is coming to an end. When the backup is finished /home folder returns to his original size of 50GB.
I'm guessing that backup script first does full backup of ALL sites, than compares it to existing backup and keeps only the diff, but this spike in HDD usage is becoming a big problem. Is there any way to change the way this is done, perhaps to do this process one site at a time instead of everything at once?
During the last backup HDD usage was 94% and it's a matter of days when there will be no more disk space to finish the process.
This is becoming a bigger and bigger problem each day and I could really use some help. :)