Photoshop_elements 11 - max number of pictures or file size

Bonjour,
J'ai actuellement environ 30 000 photos (200 Go) et environ 5000 de plus par an. J'ai 2 questions :
1) Depuis un certain temps, j'observe un ralentissement notable : lenteur au démarrage et à l'affichage du catalogue, lenteur à la reconnaissance des visages et absence de proposition, lenteur à l'analyse ... grande lenteur à la sauvegarde
Combien de photos ce logiciel (ou taille du catalogue max) peut-il supporter ?
si je commence à atteindre les limites, vers quel logiciel pourrais-je me tourner ?
sinon, changer de pC ?
2) Y a-t-il un moyen de sauvegarder uniquement les metadonnées, la liste des mots-clés ... il doit y avoir des bases de données quelque part , non ?
Merci d'avance pour votre aide

Il y a en fait 3 domaines logiciels différents à prendre en compte pour la vitesse d'exécution.
Commençons par la plus évidente : quel que soit votre système d'organisation, 200 Go  représentent un très gros volume sur le disque, ce qui fait que de toutes façons vous aurez peut-être besoin de plus de 3 heures de sauvegarde. Dans une moindre mesure, le nombre de fichiers détermine combien de petites vignettes l'organiseur devra stocker et gérer. Avec 30 000 fichiers, vous n'aurez aucun problème (j'ai 49 000 fichiers et certains ont cité 175 000...)
Ensuite, la base de donnée elle-même et tout le travail d'organisation : albums, mots-clés, légendes, versions ou piles... Contrairement à ce que beaucoup pensent, elle est capable  d'assurer des requêtes extrêmement rapides  même avec plus de 100 000 fichiers. D'ailleurs il n'y a aucune raison pour que l'organiseur soit inférieur sur ce point à son grand frère Lightroom avec qui il partage le même moteur de base de donnée, Sqlite. Le nombre de mots-clés ou de personnes dans la base de données n'est pas très déterminant, mais il peut vous ralentir quand vous avez à sélectionner un mot-clé dans une très longue liste.
Le point le plus critique est l'utilisation de plusieurs fonctions automatiques éxécutées en tâche de fond de l'organiseur comme les analyses automatiques, la surveillance des dossiers pour de nouvelles photos ou la reconnaissance de personnes. C'est le point à surveiller en premier.
Sur le plan matériel, le plus important est la mémoire vive disponible. Même si PSE est un programme 32 bits, il bénéficie de beaucoup plus de mémoire sur un système 64 bits.
Pour votre deuxième question :
Sauvegarder votre catalogue sans les fichiers d'image. Rien de plus simple, localisez le répertoire du catalogue grâce au menu Aide / Information système. Copiez ce répertoire où vous voulez. Vous pouvez même vous dispenser de copier le fichier des vignettes, thumb.5.cache, puisqu'il est automatiquement régénéré s'il manque.

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