Messages in this thread | | | Date | Thu, 4 Sep 2003 08:55:37 -0700 | From | Andrew Morton <> | Subject | Re: precise characterization of ext3 atomicity |
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Hans Reiser <reiser@namesys.com> wrote: > > Is it correct to say of ext3 that it guarantees and only guarantees > atomicity of writes that do not cross page boundaries?
Yes.
> By contrast, ext3 only guarantees the atomicity of a single write > that does not span a page boundary, and it guarantees that its internal > metadata will not be corrupted even if your applications data is > corrupted after the crash.
Not sure that I understand this. In data=writeback mode, metadata integrity is preserved but data writes may be lost. In data=journal and data=ordered modes the data and the metadata which refers to it are always in sync on-disk.
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