It's great that you guys haven't seen any data loss in the field in "a long time", I'm genuinely happy that most users have a good experience out-of-the-box. But as far as I know from the DirectoryStorage list, there have been ZERO reported cases of data loss with DS, ever. The problems I had with FS were very user-visible - whole folders went missing at the same time that we had massive POSKeyErrors, and they had to be laboriously restored from old backups. One of these occasions was likely caused by a long-since-fixed packing bug. The others, I have no idea whether the problems were ultimately caused by software issues, hardware issues (if so, there have never been any other visible problems on the same hardware, which has been up continuously for the past 40 months), or what. But after a while, you stop caring. It may not be totally rational, but it's kinda like if you drive a Ford and it careens off the road spontaneously on more than one occasion. Ford can show me reams of documents on how they've fixed the problem, or there's no proof the car was at fault, etc etc, but I still won't buy another one. Know what I mean?
Corruption in DB vs. Storage
Posted bytseaverat
2005-08-28 12:24 AM
Paul wrote:
> The problems I had with FS were very user-visible - whole folders went missing at the same
> time that we had massive POSKeyErrors, and they had to be laboriously restored from old
> backups. One of these occasions was likely caused by a long-since-fixed packing bug.
> The others, I have no idea whether the problems were ultimately caused by software issues,
> hardware issues (if so, there have never been any other visible problems on the same
> hardware, which has been up continuously for the past 40 months), or what.
Given the "changelog on the homepage",http://dirstorage.sourceforge.net , it seems safe to
say that DS has had some problems through its life, as well. FWIW, the only similar problems
*I* have seen have been due to application-level bugs (swallowed ConflictErrors), rather than
storage-level bugs. Tim's conclusion (all reported data-loss is due\ to hardware issues) goes
back at least to before ZODB 3.2.
> The problems I had with FS were very user-visible - whole folders went missing at the same
> time that we had massive POSKeyErrors, and they had to be laboriously restored from old
> backups. One of these occasions was likely caused by a long-since-fixed packing bug.
> The others, I have no idea whether the problems were ultimately caused by software issues,
> hardware issues (if so, there have never been any other visible problems on the same
> hardware, which has been up continuously for the past 40 months), or what.
Given the "changelog on the homepage",http://dirstorage.sourceforge.net , it seems safe to
say that DS has had some problems through its life, as well. FWIW, the only similar problems
*I* have seen have been due to application-level bugs (swallowed ConflictErrors), rather than
storage-level bugs. Tim's conclusion (all reported data-loss is due\ to hardware issues) goes
back at least to before ZODB 3.2.