Hi Andy,
For some files we have a adler32 checksum value in our local
database, I write a script to check every data servers and remove the
bad ones. For those there is no adler32 checksum registered, I have no
solution.
Wen
On Wed, May 12, 2010 at 1:07 AM, Andrew Hanushevsky <[log in to unmask]> wrote:
> Hi Wen,
>
> Actually, I am suprised that you got duplicate files in the first place. The
> current behaviour is to truncate any existing file to zero length prior to
> writing it. If the file exists, the client will be driven to that location.
> If it doesn't exist, a random server will be chosen. If more than one copy
> exists then the write will be denied. So, how did you manage to get
> differing duplicate copies?
>
> Andy
>
> ----- Original Message ----- From: "wen guan" <[log in to unmask]>
> To: "Andrew Hanushevsky" <[log in to unmask]>
> Cc: <[log in to unmask]>
> Sent: Tuesday, May 11, 2010 8:20 AM
> Subject: xrdcp overwrite a file
>
>
>> Hi Andrew,
>>
>> Could xrdcp overwrite a file which already exists? Because now
>> "xrdcp -f " will create a new file if the file already exists. It
>> caused a lot of problem for us. Because some of us used "xrdcp -f" to
>> rerun failed jobs, it created more than one replication for some
>> files(one good file and the others are bad files). When reading these
>> files, xrootd randomly select one replication to read. The result is
>> that many bad files are read.
>>
>> So could xrdcp have an option to overwrite the old file instead of
>> creating a new replication?
>>
>> Thanks
>> Wen
>>
>
>
