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Re: single-bit errors

From: Mike Pumford
Subject: Re: single-bit errors
Date: Thu, 23 Nov 2000 09:24:13 +0000

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> We have noticed that some of our files in CVS are getting off-by-one bit 
> errors.  For example, in a text file, an 'L' is converted into a 'K' and 
> a space into a '1' (two bits were modified here).  This is not too bad 
> in text files because a differencing tool will usually detect the 
> problem, but binary files could be a more significant problem.
Sounds to me like you have a hardware problem with either the client 
that is commiting these files or more likely your CVS server. The CVS 
server I maintain had a memory problem recently which on rare occasions 
caused 1 bit errors in the ,v files. Try swapping out various hardware 
components until the fault goes away.

> Our developers are geographically separated, so we use pserver mode 
> where the server is accessible on the internet.  Are there any built-in 
> CVS features or extra transmission verification methods we could use to 
> minimize the possibility of errors in CVS?
TCP is already quite good at this. However all the network error 
detection in the world won't help if it is the CVS server that is 
mangling the files.


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