Information Technology Reference
In-Depth Information
defineeachone
walkthrougheachone
manydifferentorganizations,butallmustsolvesameproblems
basicgoal:needamapfrom<filenum,blocknum>-->block
ondisk
freespace
localityheuristics
---FAT:Linkedlist
---FFS:Fixedtree
---NTFS:flexibletree
---WAFS:Writeanywherefilesystems
(e.g.,WAFL,LFS,
--Directories
--SEcurity
--Alternatives
--Future...
13.1
Accessing files: API and caching
openfile,read/write/seek,closefile
filenames:hierarchicaldirectories
rootdirectory,subdirectories
example:/bin/ls
/home/mike
currentworkingdirectory
e.g.,cd/home/mike
ls
cd
currentdirectory.
parentdirectory..
