How can distributed file systems ensure cache consistency?
What will be an ideal response?
There are two ways to ensure cache consistency: allow a client to invalidate its copy of
the file against the copy on the server or allow the server to issue locks to give clients exclusive write access to a file. To invalidate a file, the client checks the time stamp of the copy of
the file on the server. If it has been updated since the client last copied the file, then the client
must download the latest version. If it has not been updated, then the client can work on its
cached copy. If the server issues locks to give clients exclusive write access to a file, when
another client needs to access the file it must wait for the client holding the lock to release the
lock. The server still has ultimate control over the file and can revoke the lock when necessary.
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Is there a way to write the entire contents of a numeric array in one cout statement?
What will be an ideal response?
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