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The Write Anywhere File Layout (WAFL) is a proprietary file system that supports large, high-performance RAID arrays, quick restarts without lengthy consistency checks in the event of a crash or power failure, and growing the filesystems size quickly. It was designed by NetApp for use in its storage appliances like NetApp FAS, AFF, Cloud Volumes ONTAP and ONTAP Select.

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  • Write Anywhere File Layout (de)
  • Write Anywhere File Layout (it)
  • WAFL (ru)
  • Write Anywhere File Layout (en)
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  • WAFL (англ. Write Anywhere File Layout — файловая структура с записью повсюду) — файловая система, используемая в специализированных операционных системах семейства , применяемых в системах хранения данных компании NetApp. Система используется не только для сетевых накопителей, но и для организации хранения блочных сетей хранения данных. Как блочное, так и файловое хранение организовано поверх методов управления и адресации данных в WAFL, независимо друг от друга. Ряд идей WAFL заимствованы в файловой системе ZFS. (ru)
  • Write Anywhere File Layout (WAFL) ist ein Dateisystem, das von NetApp für deren Massenspeichersysteme unter dem Einsatz des Betriebssystems entwickelt wurde.Es hat eine Verwandtschaft zu UNIX-Dateisystemen, wie dem Berkeley Fast File System und . (de)
  • The Write Anywhere File Layout (WAFL) is a proprietary file system that supports large, high-performance RAID arrays, quick restarts without lengthy consistency checks in the event of a crash or power failure, and growing the filesystems size quickly. It was designed by NetApp for use in its storage appliances like NetApp FAS, AFF, Cloud Volumes ONTAP and ONTAP Select. (en)
  • Write Anywhere File Layout (WAFL) è un file system ottimizzato per le scritture casuali. È stato sviluppato da NetApp per sistemi NAS durante lo sviluppo del sistema operativo Data Ontap. Sebbene in principio fosse progettato per i soli protocolli NFS e clustered file system, WAFL consente anche l'uso di FTP ed HTTP. Il suo progettista sostiene che non si tratti di un file system, in quanto WAFL mette a disposizione una serie di meccanismi che permettono a diversi file system di accedere ai blocchi del disco. (it)
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  • WAFL (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Copy_On_Write_technique.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/MetroCluster_replication_diagram.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/NVRAM-MCC.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/NetApp_RoW_Snapshot_(TM).png
  • http://commons.wikimedia.org/wiki/Special:FilePath/WAFL_Data_Layout_2.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Write_Anywhere_File_Layout.png
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single instance storage
  • Yes (en)
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  • Write Anywhere File Layout (en)
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  • Write Anywhere File Layout (WAFL) ist ein Dateisystem, das von NetApp für deren Massenspeichersysteme unter dem Einsatz des Betriebssystems entwickelt wurde.Es hat eine Verwandtschaft zu UNIX-Dateisystemen, wie dem Berkeley Fast File System und . WAFL wurde beim Design für Netzwerk-Dateizugriffe optimiert, Fähigkeiten wie eine unterbrechungsfreie Vergrößerung eines Dateisystems wurden daher schon von Grund auf implementiert. Eine wichtige Besonderheit ist, dass bei diesem Dateisystem ohne Unterbrechung Snapshots des Dateisystems erstellt werden können. Lokale Rücksicherungen werden so z. B. in Windows sehr einfach. (de)
  • The Write Anywhere File Layout (WAFL) is a proprietary file system that supports large, high-performance RAID arrays, quick restarts without lengthy consistency checks in the event of a crash or power failure, and growing the filesystems size quickly. It was designed by NetApp for use in its storage appliances like NetApp FAS, AFF, Cloud Volumes ONTAP and ONTAP Select. Its author claims that WAFL is not a file system, although it includes one. It tracks changes similarly to journaling file systems as logs (known as NVLOGs) in dedicated memory storage device non-volatile random access memory, referred to as NVRAM or NVMEM. WAFL provides mechanisms that enable a variety of file systems and technologies that want to access disk blocks. (en)
  • Write Anywhere File Layout (WAFL) è un file system ottimizzato per le scritture casuali. È stato sviluppato da NetApp per sistemi NAS durante lo sviluppo del sistema operativo Data Ontap. Sebbene in principio fosse progettato per i soli protocolli NFS e clustered file system, WAFL consente anche l'uso di FTP ed HTTP. Dato che durante il suo sviluppo è stato ottimizzato per l'accesso ai dati in rete, fra le caratteristiche native c'è, ad esempio, la possibilità di estensione dello spazio del file system senza interruzione del servizio. Ulteriori caratteristiche sono il supporto di grandi array di RAID veloci e la possibilità di riavvio veloce del sistema senza la necessità di lunghi tempi d'attesa dovuti alla latenza per i controlli di integrità in seguito a crash di sistema o mancanza di alimentazione. Nonostante questo, il sistema procede periodicamente a dei controlli di integrità che possono durare giorni. Il suo progettista sostiene che non si tratti di un file system, in quanto WAFL mette a disposizione una serie di meccanismi che permettono a diversi file system di accedere ai blocchi del disco. (it)
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