Re: e-transfer from terapix

From: JJ Kavelaars <jjk_at_hia-iha.nrc-cnrc.gc.ca>
Date: Tue, 20 Mar 2007 22:07:57 -0700

On 20-Mar-07, at 7:34 PM, kanoa wrote:

>
> I'll second this, it would be nice to use a widely available hash
> format so we (CFHT) and other users can confirm data integrity. md5
> would be ideal since we already track md5 signiatures for all CFHT
> data.
>
> -Kanoa

BTW Kanoa, the cadcCRC binary is on the machines at CFHT also. How-
ever, as mentioned earlier, we are moving to MD5 and also looking at
complying with the FITS-standard initiative of CRC in the header.

Has CFHT been looking at following the FITS standard on checksums?

JJ




>
>
> Frederic Magnard wrote:
>
>>> Alternatively, I can provide you with our 'CRC' of the file and
>>> you can
>>> compare our 'CRC' to value you get by running our crc-generator
>>> on the file.
>>> The binary for our crc generator is on your machine at
>>>
>>> clix.iap.fr:/home/nis/cadc/bin/cadcCRC
>> Thanks. Could we please have the source code of this program ?
>> Do you plan to switch to a checksum like md5 ? It's almost 2 times
>> faster,
>> and the resulting hash is 4 times longer. Did you ever had collision
>> problems with this CRC ?
>
Received on Tue Mar 20 2007 - 19:08:30 HST