<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class="">Hi,</div><div class=""><br class=""></div><div class="">Not the answer but factual background, taken from The digiKam Handbook, page 30:</div><div class=""><br class=""></div><div class="">"Everyone knows about database, it is used to store data. As all other photographs management programs, digiKam too uses the database for some obvious reasons like avoiding data duplica- tion, reducing data redundancy, a quick search engine, and greater data integrity. Moreover, the cost of data entry, storage and retrieval are drastically reduced. Additionally, any user can access the data using query language.<br class=""><br class="">Talking in particular about digiKam, the Albums, Album Roots, Tags, Thumbnails, Face Recog- nition Data, Image Metadata, File Paths, Settings etc. are all stored in different database files.</div><div class=""><br class=""></div><div class="">The digiKam actually manages more than one databases. For convenience, it is broadly categorized in three:<br class=""><br class=""><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>• Core database for all collection properties, i.e. it hosts all albums, images and searches data.<br class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>• Thumbnails database for compressed thumbnails i.e. to host image thumbs using wavelets compression images (PGF format).<br class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>• Face database for storing face recognition metadata i.e. to host face histograms for faces recognition.”</div></div><div class=""><br class=""></div><div class="">Regards</div><div class="">Henrik</div><div class=""><br class=""></div><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">3 feb. 2022 kl. 14:09 skrev George Koulomzin <<a href="mailto:george@koulomzin.com" class="">george@koulomzin.com</a>>:</div><br class="Apple-interchange-newline"><div class="">
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<div class=""><p class="">Thanks for your reply!</p><p class="">The XMP solution would avoid issues with invalid paths that I
suspect would be a problem if one were to try to copy the actual
DB, so it is attractive.</p><p class="">I've also been reading up on the "remote server" approach. I
would be the best solution if performance is acceptable. Does
anyone have any experience with this? <br class="">
</p><p class="">It is not clear to me where the "training" information is kept,
i.e. the set of parameters which help the algorithm decide this
picture shows John rather than Joseph. Clearly, sidecars would
not be the place. How would one synchronize <i class="">that</i>
information?<br class="">
</p><p class="">My environment is:</p>
<ul class="">
<li class="">Windows 10 OS all around.<br class="">
</li>
<li class="">WiFi everywhere, with cat 6 cable to some locations</li>
<li class="">90,000+ image files, with a lot of "duplication" -- I keep
both jpg's and raw files.</li>
</ul><p class="">Thanks in advance...</p><p class=""><br class="">
</p>
<div class="moz-cite-prefix">On 2/2/2022 7:27 AM, Henrik Hemrin
wrote:<br class="">
</div>
<blockquote type="cite" cite="mid:5664164F-827C-4E2E-9E2C-7026EC0BBBF1@hemrin.com" class="">
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George,
<div class=""><br class="">
</div>
<div class="">On the second question, I would use the XMP sidecar
as the key for solution. You set up so DK writes metadata to XMP
side car, you bring the latest side car with you between your
computers and ask DK data base to read the latest XMP side car
file after you have updated it/brought to the other computer.
This method of course means you cannot update the same photo on
both machines at the same time. </div>
<div class=""><br class="">
</div>
<div class="">Someone else may elaborate more in detail, but one
general level, I believe this can be a simple solution. </div>
<div class=""><br class="">
</div>
<div class="">I am sure it is possible make a more advanced setup,
I guess that kind of effort depends on how many photos, how
often etc, if a more automatic proper sync is better. But again,
someone else may have that answer. </div>
<div class=""><br class="">
</div>
<div class="">Best regards</div>
<div class="">Henrik Hemrin<br class="">
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">1 feb. 2022 kl. 14:25 skrev George Koulomzin
<<a href="mailto:george@koulomzin.com" class="moz-txt-link-freetext" moz-do-not-send="true">george@koulomzin.com</a>>:</div>
<br class="Apple-interchange-newline">
<div class="">
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charset=UTF-8" class="">
<div class=""><p class="">Hello, I a new to the list, so please
forgive me if these questions have been answered.</p>
<ul class="">
<li class="">the archive is organized by month. Is
there a way of seeing thread topics by year, or
longer?</li>
<li class="">how can one synchronize tag metadata
(e.g. faces) across two computers. I have a desktop
pc with ALL my photos and a laptop with SOME of my
photos (laptop is always a subset). I've done face
recognition on the laptop (subset); can I port the
resulting metadata back to the pc so as not to have
to repeat all the training?</li>
</ul><p class="">Thanks in advance!<br class="">
</p>
<pre class="moz-signature" cols="72">--
George Koulomzin
7 Bridge Hill Lane,
PO Box 781
Bridgehampton, NY, 11932
(h) 631-537-4956
(c) 914-393-6179</pre>
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</blockquote>
</div>
<br class="">
</div>
</blockquote>
<pre class="moz-signature" cols="72">--
George Koulomzin
7 Bridge Hill Lane,
PO Box 781
Bridgehampton, NY, 11932
(h) 631-537-4956
(c) 914-393-6179</pre>
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