Notes
LOCUS & NFS notes
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NFS: file servers & file clients (few servers, many clients)
- files live on the servers
LOCUS: every computer has files, not all files are on all computers
- so each computer could be a server or a client - or just have local access
could have replicas but logically should act like one file
- so replicas have to by synchronized
- did centralized sync via a designated host - all updates would go
there, and then it would distributed the updates to the replicas
Is LOCUS very fault tolerant?
files could only be as big as any disk
- really, idea was small files, not large ones
Partitioning was a concern, they have recovery methods, but really individual hosts going down would not lead to good performance
- would try to recover, but fundamentally fragile
LOCUS tried for transparency, but faults would break that model fast
NFS did too, mostly worked, except with faults or if you unlinked open files