Information Technology Reference
In-Depth Information
solution:directories
directory:name->filenumber
Youwouldinventdirectoriesiftheydidn'talreadyexist
pieceofpaper...
storeinafile
regularfile
restrictwriteinterfacetomaintainstructure
hiearchy
example:/foo/bar/baz
example:/foo/bar/bazonFFS
links--hardandsoft
NTFS,ZFS--specialcase;ot"justfiles"
file:///Users/dahlin/Downloads/ntfsdoc-0.5/concepts/directory.html
also--NTFSdirectoryindexentriesinclude
copiesofallstandardattributes[[sofileneedspointerback
todirectorytoallowatomicupdate?Whatabouthardlinks?]]
13.4
Putting it all together: File access in FFS
what disk accesses occur when reading first block of /foo/bar/baz
exercise: what updates if create new file /foo/bar/new
13.5
Alternatives to file systems
defer?
quickoverviewofdatabase
bigtable
[botharekey->valuestores;nodirectories;differentlocality
