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[ILUG] Same data on several computers

[ILUG] Same data on several computers

David O'Callaghan david.ocallaghan at cs.tcd.ie
Wed Jun 15 17:37:08 IST 2005


On 15/06/05 17:24, Brendan Halpin wrote:
> At the risk of waking the dead, I'll disturb a sleeping thread...
> =

> Timothy Murphy <tim at birdsnest.maths.tcd.ie> writes:
> =

> =

>>I have innumerable files scattered over four or five computers,
>>and I would like to work out which are the same,
>>and organise them in some rational way.
>>Is there a Great Robotic Organizer program that will do this?
>>
>>In connection with this,.
>>is there any way when I delete a file on one computer
>>of saying "and delete this file anywhere on any computer on the system"?
> =

> =

> There was some erudite discussion of aspects of this problem, but
> no mention of rsync, which will "delete this file anywhere on any
> computer on the system" if properly asked (which might mean the
> differing computers having similar directory structures etc.). =


My favourite tool for this sort of thing is Unison =

(http://www.cis.upenn.edu/~bcpierce/unison/). It syncs in both =

directions whereas rsync is one-way. And if you do a unison sync first =

between machine A and machine B, then between machines B and  C, and =

finally between machines A and B again, the result is that machine A =

will be in sync with machine C.

As with Brendan's suggestion, this requires the machines to have similar =

directory structures, so maybe this will be more useful after you've =

done your grand reorganization.

David


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