Timestamps to Detect R-W Conflicts in Mobile Computing
نویسنده
چکیده
In mobile computing, it is desirable to allow read and write accesses to occur on replicated copies of the file at MH (mobile host) and MSS (mobile service station) to increase availability. However, the read-write conflicts among the copies of the database file are to be detected when MH gets connected to MSS. We present a timestamp based technique for the detection of read-write conflicts for a single file in mobile computing. In our model, we detect and resolve read-write conflicts with the help of stored timestamps along with some additional information. We assume updates at MH and MSSs as blind writes (do not read data before updating) common in mobile computing environment. Blind writes do not cause write-write (W-W) conflicts and therefore, we deal with only read-write (R-W) conflicts.
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