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Un ",[394,492,489],{}," peut englober plusieurs ",[394,495,483],{}," mais pas l'inverse.",[409,498,499,502,503,505],{},[413,500,501],{},"dataset"," : un système de de donnée dans un ",[394,504,489],{},". Chaque dataset peut avoir ses propres options (compression, quotas, permissions, etc.).",[390,507,508],{},"Il existe plusieurs types de dataset :",[406,510,511,517,523],{},[409,512,513,516],{},[413,514,515],{},"file system"," : un système de fichier, ZFS par défaut, monté comme un volume sans quota de stockage.",[409,518,519,522],{},[413,520,521],{},"zvol"," : un \"disque virtuel\" avec un quota d'espace, que vous pouvez formater\u002Fpartitionner comme vous le souhaitez. Il sera utilisable comme un disque physique.",[409,524,525,528],{},[413,526,527],{},"snapshot"," : un état figé d’un autre dataset à un instant donné. Ils peuvent etre créés manuellement ou via des outils de sauvegarde. Ils peuvent etre montés pour parcourir les données dans leur état au moment du snapshot.",[463,530,532],{"id":531},"pourquoi-zfs-vs-les-autres","Pourquoi ZFS vs les autres ?",[534,535,537],"h3",{"id":536},"intégrité-des-données","Intégrité des données",[390,539,540],{},"ZFS vérifie automatiquement que les données stockées ne sont pas corrompues. Chaque bloc de données est accompagné d’une empreinte (checksum) qui permet à ZFS de détecter toute altération, même minime. Et s’il y a un problème, il peut souvent le réparer automatiquement, si une copie saine existe ailleurs dans le système.",[534,542,544],{"id":543},"raid-intégré","RAID intégré",[390,546,547,548,550],{},"ZFS propose son propre système de gestion de volumes (vdev). Vous pouvez créer un pool de stockage (zpool) en combinant plusieurs disques, un peu comme avec le ",[442,549,51],{"href":444}," classique, mais de façon plus souple. Par exemple :",[406,552,553,559,565,571],{},[409,554,555,558],{},[413,556,557],{},"Z-mirror"," => equivalent du RAID 1",[409,560,561,564],{},[413,562,563],{},"RAIDZ1"," => équivalent du RAID 5 (tolérance à 1 panne disque)",[409,566,567,570],{},[413,568,569],{},"RAIDZ2"," => équivalent du RAID 6 (tolérance à 2 pannes disque)",[409,572,573,576],{},[413,574,575],{},"RAIDZ3"," => (tolérance à 3 pannes disque)",[390,578,579],{},"ZFS gère cela directement, pas besoin de logiciel RAID externe.",[581,582,583,584,587],"note",{},"Consultez ",[442,585,586],{"href":444},"l'article sur le RAID"," pour en savoir plus sur la solution qui vous convient.",[534,589,591],{"id":590},"snapshots-et-clones","Snapshots et clones",[390,593,594],{},"ZFS permet de créer des snapshots, c’est-à-dire des captures instantanées de l’état d’un système de fichiers à un moment donné. Ces snapshots prennent très peu d’espace et peuvent être créés automatiquement et fréquemment. Vous pouvez aussi faire des clones : des copies modifiables d’un snapshot.",[534,596,598],{"id":597},"compression-et-déduplication","Compression et déduplication",[390,600,601],{},"ZFS peut compresser les données à la volée (transparente pour l’utilisateur), ce qui permet d’économiser de l’espace disque. Il propose aussi la déduplication (éliminer les doublons), mais cette fonctionnalité consomme beaucoup de mémoire et n’est pas recommandée pour tous les usages.",[603,604],"hr",{},[390,606,607,608,611],{},"Voilà, à présent vous savez pourquoi ZFS est ",[394,609,610],{},"Ze"," système de fichiers à déployer sur votre NAS.",{"title":472,"searchDepth":613,"depth":613,"links":614},2,[615,616],{"id":465,"depth":613,"text":466},{"id":531,"depth":613,"text":532,"children":617},[618,620,621,622],{"id":536,"depth":619,"text":537},3,{"id":543,"depth":619,"text":544},{"id":590,"depth":619,"text":591},{"id":597,"depth":619,"text":598},[624],"Djeex","Introduction à ZFS, système de fichiers et gestionnaire de volumes combinés avec snapshots, checksums et redondance intégrée pour un stockage fiable.","md",null,{},true,{"title":55,"description":625},"g4PtYZH8ugmdy8WaIk0oiqq_yKtm4_OOuuq9TiTb1_o",[633,635],{"title":51,"path":52,"stem":53,"description":634,"children":-1},"Comprendre le RAID, matériel vs logiciel, niveaux RAID, et comment mettre en place des grappes de disques redondants pour votre homelab.",{"title":65,"path":66,"stem":67,"description":636,"children":-1},"Les fondamentaux du matériel serveur. CPU, RAM, stockage et facteurs de forme pour bien démarrer votre homelab.",1788645850990]