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ZFS is a filesystem that was designed by Sun Microsystems. It's core benefit is that it is a fully versioned filesystem, allowing multiple previous versions of one file to be stored with near zero overhead to the filesystem.
This is because the previous versions only store what had changed in the file, allowing the meta-files to be built dynamically from the data on the disk.
Additionally, it allows one to build dynamic RAID Arrays by simply adding storage capacity to the "pool".
The largest benefit of the filesystem is the way that data is stored and accessed. It will perform checksums on all data to detect file corruption and then automatically rebuild the lost data. It will also automatically reorder data based on patterns in how it is accessed.
Additionally, instead of a standard file system table as is used in most file systems for indexing, it uses an actual database entry that can be read strait from the disk into the drive's memory for immediate access to all metadata for all files on the whole partition.
Ma to je vec dobar file sistem, samo ne verujem da ce ga Apple implementirati po defaultu pre 10.6... Ali, negove mogucsnoti po pitanju cuvanja rezervnih kopija fajlova, cine se savrsenim za "zero performance hit" Time Machine implementaciju pod nekom buducom verzijom Mac OS X. Zato su, izgleda iz Apple-a toliko i zainteresovani da ZFS-om smene HFS+...
Pre par meseci sam ostavio link ka videu u kojem se pokazuju napredne mogucnosti ZFS-a. Deluje jako impresivno. Mislim da bi implementacija ZFS-a bila pun pogodak za Apple.
Pa ne verujem da ce stici... Leopard izlazi za dvadesetak dana. Bilo bi super, ali koliko vidim ovo je tek preview release za divelopere. Niti je public beta, niti je deo sistema. Leopard podrzava ZFS, ali samo za citanje, bez mogucnosti upisa. Mada, nikad se ne zna...
