Heyho! On Friday 05 March 2010 20.18:46 Greg Smith wrote: > The short version is that ext3 combined with regular hard drives has > never been safe for database use by default, [...] > The change in ext4 [...] eliminating the source for that cheat. Tangentially related: how is the behaviour [1] of pg when the db is located on an extent based cow filesysstem like btrfs? I'm not too sure about the internals, but my understanding is that the mechanism is a bit similar to what pg does with its mvcc: new content is written into empty space and then later pointers are updated to point to the new content. [1] I'd expect that there are no issues with reliability, assuming the fs is bug-free. I'm more worried about performance. Wouldn't the table files get fragmented more and more with updates? cheers -- vbi -- featured product: vim - http://vim.org
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