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Hi all,<br>
<br>
My understanding is that "classic" format since release of NetCDF
3.6 includes support of "large files" (>2.2 Gbytes) using "64-bit
offset". Although we recommend against files larger than 2.2 Gbytes
for CMIP5 we don't absolutely forbid it. We certainly don't forbid
specifying "64-bit offset". I think we should recommend use of
3.6.3 or higher to users, and encourage them to install even more
recent versions.<br>
<br>
I agree with Martin on this. Perhaps we can post (when time
permits) a FAQ indicating that 3.6.3 or higher should be used in
reading CMIP5 data.<br>
<br>
Best regards,<br>
Karl<br>
<br>
<br>
On 1/19/12 4:03 AM, <a class="moz-txt-link-abbreviated" href="mailto:martin.juckes@stfc.ac.uk">martin.juckes@stfc.ac.uk</a> wrote:
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<p class="MsoNormal">Hello All,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ve just noticed, following a user query,
that GFDL data is in NetCDF “64-bit offset” format, rather
than “classic”. “64-bit offset” mode requires NetCDF 3.6 or
later, hence causing at least one user a problem (because of
an old IDL installation using an even older netcdf library). I
believe that most of the archive is in “classic” mode and that
this was, strictly speaking, requested. However, as I have
just copied 40 thousand files from GFDL to BADC, I’m not keen
on having the GFDL data changed – rather, I think we should
advise users to update their software. NetCDF 3.6.0 was
released in Feb. 2007, so we are not exactly forcing the pace
as far as software upgrades go,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Cheers,<o:p></o:p></p>
<p class="MsoNormal">Martin<o:p></o:p></p>
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<br>
<p>-- <br>
Scanned by iCritical.
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<br>
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