Describe the three stages Coda clients go through when reading and writing to a file on the Coda server.

Question

What will be an ideal response?

Answer 1

Coda clients go through three stages to perform reading and writing. They enter the
hoarding stage when they are first connected to Coda. In this stage, the clients are preparing
for a possible disconnection from the system by building up a cache for the user-required
files. Coda clients enter the emulation stage when they become disconnected. During the
emulation stage, all file read requests are satisfied from the cache.Writes during the emulation
stage occur in two steps. First, the file is updated on disk. Second, a log called the client
modification log (CML) is updated to reflect file changes. Venus modifies the CML so that
when a log entry is undone by a later entry, the earlier log entry is removed. The CML also
facilitates updates during the reintegration stage. Coda clients enter the reintegration stage
when the client reconnects to the system. During the reintegration stage, Venus asynchronously
updates the server using the CML.