> > ah, but Solaris noac doesn't disable *data* caching. data is still
> > cached until the client detects the file has changed. *writes* are
> > no longer cached, but reads can hit the client's data cache as long
> > as the file doesn't change on the server.
> >
> Then their manpage is also wrong. On 2.6 (and 2.8) it says:
> noac Suppress data and attribute caching.
>
> It sounds very much like they kill all caching, but who knows
> what they actually do.
for the record, here's what my man page says (Solaris 9):
noac Suppress data and attribute caching. The data
caching that is suppressed is the write-behind.
The local page cache is still maintained, but
data copied into it is immediately written to
the server.
there's a section further down in the man page called "File
Attributes" that explains in detail how attribute caching
works and what noac does, which i think also appears in the
Solaris 8 version of this page.
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On Wed, Lever, Charles wrote:
> > > ah, but Solaris noac doesn't disable *data* caching. data is still
> > > cached until the client detects the file has changed. *writes* are
> > > no longer cached, but reads can hit the client's data cache as long
> > > as the file doesn't change on the server.
> > >
> > Then their manpage is also wrong. On 2.6 (and 2.8) it says:
> > noac Suppress data and attribute caching.
> >
> > It sounds very much like they kill all caching, but who knows
> > what they actually do.
>
> for the record, here's what my man page says (Solaris 9):
>
> noac Suppress data and attribute caching. The data
> caching that is suppressed is the write-behind.
> The local page cache is still maintained, but
> data copied into it is immediately written to
> the server.
>
> there's a section further down in the man page called "File
> Attributes" that explains in detail how attribute caching
> works and what noac does, which i think also appears in the
> Solaris 8 version of this page.
Correct. The additional explanation is contained in the Solaris 8 man
page.
--
Spencer
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