How the Backups and Data Transfers work Vigilance & PCBackup try to minimize
bandwidth use by using an intelligent "Client+Server" software
system. The Vigilance Client runs locally and the
Vigilance Server runs on the remote Web Server. When data is
transferred between the two it is always compressed 'on the fly' by the Client and similarly
decompressed by the Server, for maximum bandwidth efficiency.
When the Vigilance Client runs the backup procedure is
as follows:
- local files
are compared with the remote files - on the Vigilance Server, old/deleted files
are moved to a dated
store (e.g. 28-09-2008) - a list of just the changed and new
files is created - new files are sent direct to the Server - changed files are
compared locally and remotely, one by one, and just the changed
portions of the file are transferred - the Server
copies the old file to the dated store (28-09-2006) and then
'creates' the new file by combining the new data with the unchanged
parts of the old superceded file
This ability to do file comparisons means
that very large files that have just a few changes, can be
backed up within minutes. It is super-efficient, and fast!!
- after each run, a status email is sent to
you.
How Data is Stored Remotely The standard backup scheme typically comprises:
MAIN STORE – A
complete copy of your specified
data
1 or more Dated Backups – Dated stores of your superceded & deleted files
For extra security, we can also provide CDs/DVDs of
your data - we can store them
in our safe and/or send them to a nominated address.
Retrieving Data Individual files are easily restored
from the secure Website. This is Username and Password protected. You just
navigate to the required file and click on it (or right-click and 'Save
As') and start a normal download (see the
Demo
Site).
For larger numbers of files, an FTP program
is quicker as they can usually download whole directory structures. There
are many available (often free).
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