deletions | additions       diff --git a/Consistency Levels.tex b/Consistency Levels.tex  new file mode 100644  index 0000000..d164501  --- /dev/null  +++ b/Consistency Levels.tex 
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Consistency Levels  Should allow the application to set various levels of consistency, on the lines of fopen's (O_SYNC).  Each DB write can be called SUCCESS or FAIL on various levels like:  \begin{itemize}  \item One node's memory  \end{itemize}  \begin{itemize}  \item One node's disk  \end{itemize}  \begin{itemize}  \item Quorum's designated replicated level  \end{itemize}  \begin{itemize}  \item All nodes  \end{itemize}  Should we even allow a driver to set the last one ?  The driver can choose the consistency level on a per-connection basis or on a per-command basis. For example, all writes should be at ONE consistency level whereas all reads need to be at Quorum consistency level.  What is eventual consistency ? Explain.