I have noticed that if I move a ton of data to a VM, remove it, then backup the VM, that the backup size pretty much increases to the size before I removed the data. I am guessing this is due to the data being placed at random locations on the disk. What is the best way to get this back under control. The VM is a CentOS5 box, I am thinking dd should be able to do it, not completely sure though.
Backup Size
- Thread starter adamb
- Start date
The first one is just to create a relatively small file, the other is to fill the entire disk.
If you skip the first command, and you have a huge disk, when there is no more space and you remove the file it takes a lot, so your system would have "no more space available" for a lot of time.
With the trick of creating 2 files, you remove the first that does not take much time, and so your system has very quick free space available, and then remove the big file.
If you skip the first command, and you have a huge disk, when there is no more space and you remove the file it takes a lot, so your system would have "no more space available" for a lot of time.
With the trick of creating 2 files, you remove the first that does not take much time, and so your system has very quick free space available, and then remove the big file.