Application Of The Server Register A Callback - 1741 Words

Answer] When the client caches the data, the server register a callback, this enables the client to be informed about the data being modified. If a modification has taken place the server does not register the callback which means that it informs the client that the cached data is stale. The cached data is canceled by the client so that it can be accessed by local cache the next time it is accessed; the local cache will get the information from the server by installing the callback. This is the performance and correctness improvement over having the client periodically ask the server if its cached data is only the current data or not. The server can broadcast the changes to all the clients that cache the data, however, this approach fails when the server is not positive that is the clients will need the new data in the future. When a server hands out a callback on a file to a client, the server promises to contact the client before invalidating old copies of the file which might be cached at the client this is also known as breaking the callback, the client can use cached copies of the file freely if the callback has not been broken. 3. Consider a distributed file system that does client caching using write through. The system caches individual blocks, rather than entire files. Can the client in this system have a cache consistency problem? If so, suggest two possible solutions. Answer] Client caching causes inconsistency into the system. Consider a case where clientsShow MoreRelated Remote Control Software Used in a Local Area Network Essay8708 Words   |  35 Pagesproblems that an administrator or user can encounter on a local area network. 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