On Wed, Apr 14, 2010 at 11:52 AM, Nitro <ni...@dr-code.org> wrote: > Yes, in my case it's nothing critical or related to money. If there's a > hardware outage a day of work is lost at worst. In case of corruption > (which can happen also without fsync as data within the file can just be > garbled) you need a backup anyways.
Usually you will only loose the last transaction and not a days of work. The Data.fs is an append-only file, with one transaction appended after another. If there's a garbled or incomplete write, you'll typically loose the last transaction. The ZODB is smart enough to detect broken transactions and skip them on restart. I have witnessed one ZEO installation myself, where the physical machine hosting the ZEO server restarted multiple times a day, over a period of months. Nobody noticed for a long time, as the application was accessible all the time and no data had been lost. Obviously this wasn't a very write-intense application. But it still showed me how stable the ZODB really is. Hanno _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
