gzip failing to unzip

[Xen]

william drescher schreef op 22-03-2017 19:06:
> To find a low frequency failure in a production system I have been
> taking periodic dumps (using phymyadmin-export) specifying that the
> file be gzipped.  It appears to have worked just fine.
> 
> Today I went to unzip  one of the files to use it as a mysql source on
> the development system so I could dig into the problem and..
> 
> gunzip reported:
> gzip: IS-2016-12-31.sql.gz: decompression OK, trailing garbage ignored
> 
> The "trailing garbage" is the last 3/4 of the file.  The gzipped file 
> is 17MB.
> 
> Anybody have any ideas what is going wrong and or suggestions that I
> can try to recover the data.

I have only sometimes 'got' that when the downloaded file (over http) 
was bigger than the actual file, ie. it was some download error through 
erroneous size reporting of the server, I believe.

But you seem to suggest that the file is actually _meant_ to be 17MB 
big, right? Well not actually. Oh yeah, I'm mistaken. If 75% of the time 
is garbage that is a tad much :p. But it sounds to me that the file 
ended correctly, there was just more data that was not actually data. 
Are you completely sure the resulting file is corrupted?

Regards.