Richard,
Richard L. Hamilton wrote:
If I understand correctly, at least some systems claim not to guarantee
consistency between changes to a file via write(2) and changes via mmap(2).
But historically, at least in the case of regular files on local UFS, since
Solaris
used the page cache for both cases, the results should have been consistent.
Since zfs uses somewhat different mechanisms, does it still have the same
consistency between write(2) and mmap(2) that was historically present
(whether or not "guaranteed") when using UFS on Solaris?
Yes, it does have the consistency. There is specific code to keep
the page cache (needed in case of mmaped files) and the ARC caches
consistent.
Thanks and regards,
Sanjeev.
--
Solaris Revenue Products Engineering,
India Engineering Center,
Sun Microsystems India Pvt Ltd.
Tel: x27521 +91 80 669 27521
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