rsync - Apr 2016 - Failed verification message

Hi

We synch between servers, some are NAS with RAIDs, some are
simple Linux servers. Sometimes I get messages like:

WARNING: path/to/file failed verification -- update retained (will try again).

What are the possible reasons for this message? I looked on
the Internet and found old posts about a problem with big files.
I do get this message with big files (GB) but also with small files
(<1MB). Of course if a file is changed while being synched then
a problem is to be expected. But most files are surely not written
at this moment. The error usually only happens once for one
file, the retry or a second synch run okay.

Does this mean that the file content is wrong? Is this a problem
of the connection? What else can be done to improve the reliability
of the backup?

Thanks

bye  Fabi

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The other case where I have seen this is when one of the systems has
bad RAM that is corrupting the file in memory.

On 04/06/2016 09:48 AM, Fabian Cenedese wrote:
> Hi
> 
> We synch between servers, some are NAS with RAIDs, some are simple
> Linux servers. Sometimes I get messages like:
> 
> WARNING: path/to/file failed verification -- update retained (will
> try again).
> 
> What are the possible reasons for this message? I looked on the
> Internet and found old posts about a problem with big files. I do
> get this message with big files (GB) but also with small files 
> (<1MB). Of course if a file is changed while being synched then a
> problem is to be expected. But most files are surely not written at
> this moment. The error usually only happens once for one file, the
> retry or a second synch run okay.
> 
> Does this mean that the file content is wrong? Is this a problem of
> the connection? What else can be done to improve the reliability of
> the backup?
> 
> Thanks
> 
> bye  Fabi
> 
> 
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	Systems Administrator		Internet:
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