Re: Could I disable redo log in SSD?
Posted by:
feng guo
Date: August 15, 2014 07:35PM
Morgan Tocker Wrote:
-------------------------------------------------------
> > If something wrong happen during update many
> rows,it could undo appled changes~I just mean
> disable redo,not undo~
> > I just think redo is redundant.........
>
> What Rick was referring to is that fwrite is not
> guaranteed to be atomic, and that when patching a
> row in an existing page, corruption can occur (aka
> a 'torn page').
>
> As an alternative to REDO log, a database engine
> could always write-as-new (so the data becomes the
> log). This would provide similar to what you are
> requesting, but it also has other drawbacks.
Double write buffer could avoid page corruption~
Do you have any reference or document about "write-as-new" you mentioned?I'd like to understand this concept~
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Re: Could I disable redo log in SSD?
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