<div dir="ltr">Hi Jorge<div>I understand what you are pointing at and I use databases such as Postgres/PostGIS also with good results. The thing is that working with data in files sometimes has advantages and that is certainly how shapefiles have been used. The geopackage has been suggested as a replacement for the shapefile in the context of regular QGIS usage without any caveat saying that geopackages only replace the storage and transfer role of shapefiles and that geopackages should not be used for editing in a shared environment, as is perfectly possible with shapefiles and widely practiced. Not all users have access to database systems such as Postgres. I'm just looking for some clarity on best practices for the common scenario of working with QGIS using file based data in a network environment.<br clear="all"><div><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><br></div><font color="#000000">Árni</font></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 16 Mar 2023 at 11:47, Jorge Gustavo Rocha via QGIS-User <<a href="mailto:qgis-user@lists.osgeo.org" target="_blank">qgis-user@lists.osgeo.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
  
    
  
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    <p>Hi,</p>
    <p>For data storage and manipulation databases are suitable. Files
      are not. <br>
    </p>
    <p>Geopackages are wonderful to transfer data between systems or to
      archive an entire project (snapshot of data, styles and the
      project itself).</p>
    <p>Regards,</p>
    <p>Jorge<br>
    </p>
    <div>On 16/03/23 11:30, Árni Geirsson via
      QGIS-User wrote:<br>
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      <div dir="ltr">Thank you Jarosław. Isn't it strange that this was
        discussed 5 years ago and SMB file sharing is very common? Would
        a linux based NAS be able to use another protocol? What are my
        options for file based data sharing in QGIS? Abandoning
        geopackages is not a realistic option for me, but I could get a
        different kind of NAS unit, if that helps, what kind then? What
        amazes me is how little I see this discussed. There was a
        message in this thread this morning from Thomas Struller, but I
        am not sure it is about the same root problem, maybe Thomas can
        elaborate.
        <div>Should this perhaps be discussed in another forum, closer
          to the development of geopackage/sqlite?<br clear="all">
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                                                      <font color="#000000">Árni
                                                        Geirsson</font><br>
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      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">On Thu, 16 Mar 2023 at 09:52,
          Sadowski Jarosław <<a href="mailto:jaroslaw.sadowski@cpk.pl" target="_blank">jaroslaw.sadowski@cpk.pl</a>>
          wrote:<br>
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            <div lang="PL">
              <div>
                <p class="MsoNormal"><span lang="EN-US">Long story
                    short: gpkg is bad idea for network drives as
                    SMB/NAS etc</span></p>
                <p class="MsoNormal"><span lang="EN-US"> </span></p>
                <p class="MsoNormal"><span lang="EN-US">Sources:<br>
                  </span><a href="https://www.sqlite.org/wal.html#advantages" target="_blank"><span lang="EN-US">Write-Ahead Logging (sqlite.org)</span></a></p>
                <p class="MsoNormal"><a href="https://github.com/r-spatial/sf/issues/628" target="_blank"><span lang="EN-US">writing gpkg and sqlite on samba
                      shares fails · Issue #628 · r-spatial/sf · GitHub</span></a></p>
                <p class="MsoNormal"><span lang="EN-US"> </span></p>
                <p class="MsoNormal"><span lang="EN-US"> </span></p>
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                        <p style="font-size:9pt;font-family:Arial"><font face="Calibri"><strong>_________________________________</strong></font></p>
                        <p style="font-size:9pt;font-family:Arial;color:rgb(16,43,77)"><font style="color:rgb(16,43,77)" face="Calibri"><strong style="font-size:10pt;color:rgb(16,43,77)">Jarosław
                              Sadowski</strong><br>
                            <span style="font-family:Calibri;color:rgb(16,43,77)">Kierownik
                              Zespołu ds. Ochrony Środowiska |<span style="color:rgb(16,43,77)"> </span></span></font><em style="font-family:Calibri;color:rgb(87,87,87)"><span style="color:rgb(16,43,77)">Biuro
                              Strategii i Planowania, Projektowania i
                              Inżynierii Podprogramu Kolejowego</span></em><br>
                          <span style="font-family:Calibri;color:rgb(16,43,77)"><em>Environmental
                              Protection Team Leader </em></span><span style="font-family:Calibri;color:rgb(16,43,77)"><em>| Railway
                              Subprogramme Strategy & Planning,
                              Design & Engineering Department</em><br>
                          </span><span style="font-size:9pt;font-family:Calibri;color:rgb(16,43,77)">e:
                            <a style="font-size:9pt;font-family:Calibri;color:rgb(16,43,77)" href="mailto:jaroslaw.sadowski@cpk.pl" target="_blank">jaroslaw.sadowski@cpk.pl</a><br>
                            m: +48 532 720 230</span></p>
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                        <p style="font-size:5pt;font-family:Arial"><img src="cid:186ea42b797c23ac9e51" id="m_5292080438416008098m_-2869550827560755875m_448025373283784848m_-67684452862511980890.ylacelzjqfh" style="font-size: 5pt;" border="0"></p>
                      </td>
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                <font face="Calibri" color="#575757"><span style="font-size:5pt">Centralny Port Komunikacyjny
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                    konkurencji. Jeśli otrzymałeś tę wiadomość przez
                    pomyłkę, bezzwłocznie skontaktuj się z nadawcą
                    wiadomości oraz usuń jej treść. </span></font><br>
                <font face="Calibri" color="#575757"><span style="font-size:5pt">Centralny Port Komunikacyjny
                    Sp. z o.o. with headquarters in Warsaw, Aleje
                    Jerozolimskie 142B, 02-305 Warsaw; KRS No.
                    0000759991, District Court for the Capital City of
                    Warsaw, 12th Commercial Department of the National
                    Court Register; NIP 701-08-94-497; REGON 381918620;
                    share capital of PLN </span><span style="font-size:6.66667px">1.277.500.000,00</span><span style="font-size:5pt">.</span></font><br>
                <font face="Calibri" color="#575757"><span style="font-size:5pt">The personal data controller
                    of the personal data provided by you, among others,
                    in the e-mail correspondence, is Centralny Port
                    Komunikacyjny Sp. z o. o. based in Warsaw. The
                    personal data is processed by us in accordance with
                    the provisions of the General Data Protection
                    Regulation (GDPR), for further information please
                    read the Privacy Policy tab and the Information
                    Clause on the </span></font><a style="color:rgb(87,87,87);font-family:Calibri;font-size:5pt" href="http://www.cpk.pl/" target="_blank">www.cpk.pl</a><font face="Calibri" color="#575757"><span style="font-size:5pt"> website. </span></font><br>
                <font face="Calibri" color="#575757"><span style="font-size:5pt">The content of this message
                    and its attachments constitute the Business Secret
                    within the meaning of the Act of 16 April 1993 on
                    combating unfair competition. If you received this
                    message by mistake, contact the sender of the
                    message immediately and delete its content</span></font>
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                    <p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> QGIS-User <<a href="mailto:qgis-user-bounces@lists.osgeo.org" target="_blank">qgis-user-bounces@lists.osgeo.org</a>>
                        <b>On Behalf Of </b>Árni Geirsson via QGIS-User<br>
                        <b>Sent:</b> Thursday, March 16, 2023 10:18 AM<br>
                        <b>To:</b> <a href="mailto:jhubbslist@att.net" target="_blank">jhubbslist@att.net</a><br>
                        <b>Cc:</b> <a href="mailto:qgis-user@lists.osgeo.org" target="_blank">qgis-user@lists.osgeo.org</a><br>
                        <b>Subject:</b> [EXTERNAL] Re: [Qgis-user]
                        Geopackage slow on NAS if not read-only</span></p>
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                <p class="MsoNormal"><span lang="EN-US"> </span></p>
                <div style="border:1pt solid rgb(156,101,0);padding:2pt" id="m_5292080438416008098m_-2869550827560755875m_448025373283784848m_-6768445286251198089footer">
                  <p class="MsoNormal" style="background:rgb(255,235,156)"><span style="color:black">UWAGA: Ta wiadomość pochodzi
                      spoza CPK Sp. z o.o. Proszę pomóż zadbać o
                      bezpieczeństwo naszej organizacji.
                    </span><span style="color:black" lang="EN-US">Zastanów
                      się, zanim otworzysz link lub załącznik.</span><span lang="EN-US"></span></p>
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                <p class="MsoNormal" style="margin-bottom:12pt"><span lang="EN-US"> </span></p>
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                    <p class="MsoNormal"><span lang="EN-US">Yes, as far
                        as I know, the NAS unit uses SMB as the file
                        sharing protocol. I used another NAS from QNAP
                        before this one, also using SMB and with the
                        same problem. I thought pretty much all of the
                        Linux based NAS units were using SMB and if that
                        is the problem, it should be widespread, but I
                        don't see any signs of that. Is SMB a problem
                        for geopackage?
                      </span></p>
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                      <p class="MsoNormal"><span lang="EN-US">I did a
                          quick test in QGIS: A dataset of 178.000 line
                          features is rendered in about 1 second from a
                          read only geopackage. When I remove the read
                          only flag, it is rendered in about 5 seconds.</span></p>
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                      <p class="MsoNormal"><span lang="EN-US">If I store
                          the geopackage on the local hard drive, the
                          problem disappears, read-write or read-only
                          does not matter.</span></p>
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                      <p class="MsoNormal"><span lang="EN-US">I have had
                          suspicions about SMB being part of the problem
                          but I don't know enough about file access deep
                          down in the operating system to understand it.<br clear="all">
                        </span></p>
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                                                          <p class="MsoNormal"><span style="color:black" lang="EN-US">Árni Geirsson</span><span lang="EN-US"></span></p>
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                  <p class="MsoNormal"><span lang="EN-US"> </span></p>
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                      <p class="MsoNormal"><span lang="EN-US">On Thu, 16
                          Mar 2023 at 01:45, jhubbslist--- via QGIS-User
                          <</span><a href="mailto:qgis-user@lists.osgeo.org" target="_blank"><span lang="EN-US">qgis-user@lists.osgeo.org</span></a><span lang="EN-US">> wrote:</span></p>
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                          <p class="MsoNormal"><span lang="EN-US">Árni -</span></p>
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                          <p class="MsoNormal"><span lang="EN-US"> </span></p>
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                          <p class="MsoNormal"><span lang="EN-US">Are
                              you using SMB/CIFS to access this NAS, and
                              are you using wifi or Ethernet to connect
                              to it?</span></p>
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                          <p class="MsoNormal"><span lang="EN-US"> </span></p>
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                          <p class="MsoNormal"><span lang="EN-US">- Jeff
                            </span></p>
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                          <p class="MsoNormal"><span lang="EN-US"> </span></p>
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                          <p class="MsoNormal"><span lang="EN-US">On
                              3/15/23 3:30 PM, Árni Geirsson via
                              QGIS-User wrote:</span></p>
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                            <p class="MsoNormal"><span lang="EN-US">Hello
                                all QGIS and geopackage users. </span></p>
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                              <p class="MsoNormal"><span lang="EN-US">I
                                  store my geopackages on a Synology
                                  RackStation NAS unit, like all other
                                  documents that are kept on a shared
                                  drive in the office. For larger
                                  datasets, the rendering is very slow,
                                  unless I open the properties dialog
                                  for the file in Windows and check the
                                  read only box. After that, the
                                  features are rendered blazingly fast.
                                  Nothing else is changed to see the
                                  dramatic difference in the rendering
                                  speed. Luckily, I don't need to edit
                                  many of the larger datasets, such as
                                  road networks and elevation contours
                                  and the geopackage can be kept read
                                  only. Shapefiles are not affected.</span></p>
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                              <p class="MsoNormal"><span lang="EN-US">What
                                  explains this and does anyone know how
                                  to solve the problem? </span></p>
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                              <p class="MsoNormal"><span lang="EN-US">Do
                                  other users experience this?</span></p>
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                                                          <p class="MsoNormal"><span lang="EN-US">Árni
                                                          Geirsson</span></p>
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    <pre cols="72">-- 
Jorge Gustavo Rocha
Geomaster, LDA
"Take the open source journey with us"

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