Il 12/08/14 15:25, Claudio Freire ha scritto: > On Tue, Aug 12, 2014 at 6:41 AM, Marco Nenciarini > <marco.nenciar...@2ndquadrant.it> wrote: >> To declared two files identical they must have same size, >> same mtime and same *checksum*. > > Still not safe. Checksum collisions do happen, especially in big data sets. >
IMHO it is still good-enough. We are not trying to protect from a malicious attack, we are using it to protect against some *casual* event. Even cosmic rays have a not null probability of corrupting your database in a not-noticeable way. And you can probably notice it better with a checksum than with a LSN :-) Given that, I think that whatever solution we choose, we should include checksums in it. Regards, Marco -- Marco Nenciarini - 2ndQuadrant Italy PostgreSQL Training, Services and Support marco.nenciar...@2ndquadrant.it | www.2ndQuadrant.it
signature.asc
Description: OpenPGP digital signature
