<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0cm;
font-size:10.0pt;
font-family:"Courier New";}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;
mso-fareast-language:EN-US;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="NO-BOK" link="#0563C1" vlink="purple" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal"><span lang="EN-US">Thanks so much for clarifying, Even.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Very much appreciated.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Stefan<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:NO-BOK">From:</span></b><span lang="EN-US" style="mso-fareast-language:NO-BOK"> Even Rouault <even.rouault@spatialys.com>
<br>
<b>Sent:</b> onsdag 2. februar 2022 11:15<br>
<b>To:</b> Stefan Blumentrath <Stefan.Blumentrath@nina.no>; Rahkonen Jukka (MML) <jukka.rahkonen@maanmittauslaitos.fi>; gdal-dev <gdal-dev@lists.osgeo.org><br>
<b>Subject:</b> Re: [gdal-dev] netCDF with virtual file system (/vsicurl/) not working<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p><span lang="EN-US">The issue with userfaultfd not working with modern Linux kernels was fixed in 3.4.0 per
</span><a href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FOSGeo%2Fgdal%2Fpull%2F4508%2Fcommits%2Ff861fd3fc6826ab753e0155f15507494d54f7ecb&data=04%7C01%7CStefan.Blumentrath%40nina.no%7C695dd2841dda4047724608d9e634e2f5%7C6cef373021314901831055b3abf02c73%7C0%7C0%7C637793937096379254%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=ZwQ1uLLPdq46e6s5om%2FK5hTFndj7mzppoWX78BRT8Xc%3D&reserved=0"><span lang="EN-US">https://github.com/OSGeo/gdal/pull/4508/commits/f861fd3fc6826ab753e0155f15507494d54f7ecb</span></a><span lang="EN-US"><o:p></o:p></span></p>
<p><span lang="EN-US">/vsicurl/ on a netCDF file, with the netCDF driver, cannot work on non-Linux systems. The HDF5 driver will then trigger.<o:p></o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US">Le 02/02/2022 à 10:01, Stefan Blumentrath a écrit :<o:p></o:p></span></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">And thanks for your swift reply, Jukka.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I tried different versions on Linux (Ubuntu: ubuntugis-stable and ubuntugis-unstable):<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">3.3.2, 3.4.0<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Fedora:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">3.3.2<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">On Windows the latest OSGeo4W provided version:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">3.4.1 (and there it does not work)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">On my Fedora box however, I now compiled GDAL 3.4.1, there it seems to work again…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Cheers<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Stefan<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:NO-BOK">From:</span></b><span lang="EN-US" style="mso-fareast-language:NO-BOK"> Rahkonen Jukka (MML)
</span><a href="mailto:jukka.rahkonen@maanmittauslaitos.fi"><span lang="EN-US" style="mso-fareast-language:NO-BOK"><jukka.rahkonen@maanmittauslaitos.fi></span></a><span lang="EN-US" style="mso-fareast-language:NO-BOK">
<br>
<b>Sent:</b> onsdag 2. februar 2022 09:49<br>
<b>To:</b> Stefan Blumentrath </span><a href="mailto:Stefan.Blumentrath@nina.no"><span lang="EN-US" style="mso-fareast-language:NO-BOK"><Stefan.Blumentrath@nina.no></span></a><span lang="EN-US" style="mso-fareast-language:NO-BOK">; gdal-dev
</span><a href="mailto:gdal-dev@lists.osgeo.org"><span lang="EN-US" style="mso-fareast-language:NO-BOK"><gdal-dev@lists.osgeo.org></span></a><span lang="EN-US" style="mso-fareast-language:NO-BOK"><br>
<b>Subject:</b> Re: netCDF with virtual file system (/vsicurl/) not working</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FI">Hi,</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FI"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">What is your GDAL version? Check with "gdalinfo --version"<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-Jukka Rahkonen-<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="FI" style="mso-fareast-language:FI">Lähettäjä:</span></b><span lang="FI" style="mso-fareast-language:FI"> gdal-dev <</span><a href="mailto:gdal-dev-bounces@lists.osgeo.org"><span lang="FI" style="mso-fareast-language:FI">gdal-dev-bounces@lists.osgeo.org</span></a><span lang="FI" style="mso-fareast-language:FI">>
<b>Puolesta </b>Stefan Blumentrath<br>
<b>Lähetetty:</b> keskiviikko 2. helmikuuta 2022 10.36<br>
<b>Vastaanottaja:</b> gdal-dev <</span><a href="mailto:gdal-dev@lists.osgeo.org"><span lang="FI" style="mso-fareast-language:FI">gdal-dev@lists.osgeo.org</span></a><span lang="FI" style="mso-fareast-language:FI">><br>
<b>Aihe:</b> [gdal-dev] netCDF with virtual file system (/vsicurl/) not working</span><span lang="EN-US"><o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><span lang="FI"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have been using GDAL to access online data sources in netCDF successfully.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">With Ubuntu 20.04, this unfortunately no longer works with the netCDF driver.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Here is a reproducible example:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">gdalinfo -if netCDF /vsicurl/</span><a href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fnbstds.met.no%2Fthredds%2FfileServer%2FNBS%2FS2A%2F2021%2F02%2F28%2FS2A_MSIL1C_20210228T103021_N0202_R108_T35WPU_20210228T201033_DTERRENGDATA.nc&data=04%7C01%7CStefan.Blumentrath%40nina.no%7C695dd2841dda4047724608d9e634e2f5%7C6cef373021314901831055b3abf02c73%7C0%7C0%7C637793937096379254%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=JeCeCXg8GaE%2BbEqcfCZtSqSyhYenGCJGEXeSgRcj1hE%3D&reserved=0"><span lang="EN-US">https://nbstds.met.no/thredds/fileServer/NBS/S2A/2021/02/28/S2A_MSIL1C_20210228T103021_N0202_R108_T35WPU_20210228T201033_DTERRENGDATA.nc</span></a><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The original error message (before working around the HDF5 driver) has been that permissions for the userfaultfd system call were denied. But if I specify the netCDF driver, the format is not recognized. Downloading the
dataset and opening It locally works.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I saw some possibly relevant changes:<o:p></o:p></span></p>
<p class="MsoNormal"><a href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FOSGeo%2Fgdal%2Fpull%2F4508&data=04%7C01%7CStefan.Blumentrath%40nina.no%7C695dd2841dda4047724608d9e634e2f5%7C6cef373021314901831055b3abf02c73%7C0%7C0%7C637793937096379254%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=kC9KX9p8z8Li5%2B2Bz0n9mnIqVe7PGXZvJWmnk3nxwTs%3D&reserved=0"><span lang="EN-US">https://github.com/OSGeo/gdal/pull/4508</span></a><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><a href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FOSGeo%2Fgdal%2Fissues%2F2412&data=04%7C01%7CStefan.Blumentrath%40nina.no%7C695dd2841dda4047724608d9e634e2f5%7C6cef373021314901831055b3abf02c73%7C0%7C0%7C637793937096379254%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=0%2BaNjv%2FzsERgvjae4m6w7OmLwyyeI8hwmWweTjfk%2FQA%3D&reserved=0"><span lang="EN-US">https://github.com/OSGeo/gdal/issues/2412</span></a><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Any hint on how to get that functionality back would be very much appreciated!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Cheers<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Stefan<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:NO-BOK"><br>
<br>
<o:p></o:p></span></p>
<pre><span lang="EN-US">_______________________________________________<o:p></o:p></span></pre>
<pre><span lang="EN-US">gdal-dev mailing list<o:p></o:p></span></pre>
<pre><a href="mailto:gdal-dev@lists.osgeo.org"><span lang="EN-US">gdal-dev@lists.osgeo.org</span></a><span lang="EN-US"><o:p></o:p></span></pre>
<pre><a href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.osgeo.org%2Fmailman%2Flistinfo%2Fgdal-dev&data=04%7C01%7CStefan.Blumentrath%40nina.no%7C695dd2841dda4047724608d9e634e2f5%7C6cef373021314901831055b3abf02c73%7C0%7C0%7C637793937096379254%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=u3923jDQ0jKgi0RyTPRBpgBa%2FDhBqUGLC3lL9vF9UsE%3D&reserved=0"><span lang="EN-US">https://lists.osgeo.org/mailman/listinfo/gdal-dev</span></a><span lang="EN-US"><o:p></o:p></span></pre>
</blockquote>
<pre><span lang="EN-US">-- <o:p></o:p></span></pre>
<pre><a href="https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.spatialys.com%2F&data=04%7C01%7CStefan.Blumentrath%40nina.no%7C695dd2841dda4047724608d9e634e2f5%7C6cef373021314901831055b3abf02c73%7C0%7C0%7C637793937096379254%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=%2B6jmR1Ho4RRW%2F9odzAzLd2S%2FGQ6uZx9zOQjKKwaY3L0%3D&reserved=0"><span lang="EN-US">http://www.spatialys.com</span></a><span lang="EN-US"><o:p></o:p></span></pre>
<pre><span lang="EN-US">My software is free, but my time generally not.<o:p></o:p></span></pre>
</div>
</body>
</html>