--On Tuesday, February 21, 2006 4:48 PM +0100 Torbjörn Nordling
<[EMAIL PROTECTED]> wrote:
Problem:
I have two computers (one at work and one home) and I want to keep them
identical, but I cannot rsync them directly because when one is running
then the second is turned off. I also have access to 500 MB of storage
space on a server running continuously, which is not nearly enough to
hold all data stored on the two computers. So my idea is to use the
server for storing an rsync file list with checksums from the last update
and then upload the data that has changed to the server.
Scenario:
Last thing I do at work is update the file list on the server and upload
all data the rsync identify as changed. Then at home I would connect to
the server and download the changed data, which is integrated by rsync in
correct files. Before I turn off my home computer then I would again
rsync the changes to the server. This would make the rsync delayed in
time.
Question:
Has anyone tried something similar and could direct me towards how to
make it work? Or is this impossible today, but something that quite
simply could be built into rsync? Based on what I have read about how
rsync works it seems feasible to me.
What you're suggesting won't work. You have 2 options I can see:
1)
- Maintain a "last synced" timestamp on each client and the server.
- To sync to the server, find all files with a mtime newer that the last
synced time, and copy them onto the server, then update the sync time on
that client and the server.
- To sync from the server, check if its last sync time is different from
yours. If it is, copy the files and the timestamp from the server, then
delete the files from the server.
2)
- Maintain 2 copies of the data on both clients (using snapshots would make
your life easier and storage requirements smaller)
- Use rsync to generate batch change files between the old and new copies,
and copy them onto the server
- download and apply pending batches on the other client
--
Carson
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