% public domain. no rights reserved. see
% https://creativecommons.org/publicdomain/zero/1.0/

\section{proposed solution}

\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}










 +------------------+
 |                  |
 |                  |
 |                  |
 +------------------+
     combox directory










  computer i
  \end{semiverbatim}
  }

\end{frame}


\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0
         (dropbox)
        +-------------------+
        |                   |
        |                   |
        |                   |
        +-------------------+


 +------------------+
 |                  |
 |                  |
 |                  |
 +------------------+
     combox directory


        +-------------------+
        |                   |
        |                   |
        |                   |
        +-------------------+
         node directory 1
         (google drive)

  computer i
  \end{semiverbatim}
  }

\end{frame}


\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0
         (dropbox)
        +-------------------+
        |                   |
        |                   |
        |                   |
        +-------------------+


 +------------------+
 |                  |
 |  humans.txt      |
 |                  |
 +------------------+
     combox directory


        +-------------------+
        |                   |
        |                   |
        |                   |
        +-------------------+
         node directory 1
         (google drive)

  computer i
  \end{semiverbatim}
  }

\end{frame}


\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0
         (dropbox)
        +-------------------+
        |                   |
  (---->| humans.txt.shard0 |
  |     |                   |
  |     +-------------------+
  |
  |
 +------------------+
 |                  |
 |  humans.txt      |
 |                  |
 +------------------+
  |  combox directory
  |
  |
  |     +-------------------+
  |     |                   |
  (---->| humans.txt.shard1 |
        |                   |
        +-------------------+
         node directory 1
         (google drive)

  computer i
  \end{semiverbatim}
  }

\end{frame}


\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0                Internet
         (dropbox)                       @-------@
        +-------------------+            |       |
        |                   |            | +---+ |
  (---->| humans.txt.shard0 |            | | D | |
  |     |                   |            | +---+ |
  |     +-------------------+            |       |
  |                                      |       |
  |                                      |       |
 +------------------+                    |       |
 |                  |                    |       |
 |  humans.txt      |                    |       |
 |                  |                    |       |
 +------------------+                    |       |
  |  combox directory                    |       |
  |                                      |       |
  |                                      |       |
  |     +-------------------+            |       |
  |     |                   |            | +---+ |
  (---->| humans.txt.shard1 |            | | G | |
        |                   |            | +---+ |
        +-------------------+            |       |
         node directory 1                @-------@
         (google drive)

  computer i
  \end{semiverbatim}
  }

\end{frame}

\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0                Internet
         (dropbox)                       @-------@
        +-------------------+            |       |
        |                   |    + +     | +---+ |
  (---->| humans.txt.shard0 | - + D + ---> | D | |
  |     |                   |    + +     | +---+ |
  |     +-------------------+            |       |
  |                                      |       |
  |                                      |       |
 +------------------+                    |       |
 |                  |                    |       |
 |  humans.txt      |                    |       |
 |                  |                    |       |
 +------------------+                    |       |
  |  combox directory                    |       |
  |                                      |       |
  |                                      |       |
  |     +-------------------+            |       |
  |     |                   |    + +     | +---+ |
  (---->| humans.txt.shard1 | - + G + ---> | G | |
        |                   |    + +     | +---+ |
        +-------------------+            |       |
         node directory 1                @-------@
         (google drive)

  computer i
  \end{semiverbatim}
  }

\end{frame}


\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0                Internet
         (dropbox)                       @-------@
        +-------------------+            |       |
        |                   |    + +     | +---+ |
  (---->| humans.txt.shard0 | - + D + ---> | D | |
  |     |                   |    + +     | +---+ |
  |     +-------------------+            |       |
  |                                      |       |
  |                                      |       |
 +------------------+                    |       |
 |                  |                    |       |
 |  humans.txt      |                    |       |
 |                  |                    |       |
 +------------------+                    |       |
  |  combox directory                    |       |
  |                                      |       |
  |                                      |       |
  |     +-------------------+            |       |
  |     |                   |    + +     | +---+ |
  (---->| humans.txt.shard1 | - + G + ---> | G | |
        |                   |    + +     | +---+ |
        +-------------------+            |       |
         node directory 1                @-------@
         (google drive)

  computer i                                                                    computer ii
  \end{semiverbatim}
  }

\end{frame}


\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0                Internet              node directory 0
         (dropbox)                       @-------@             (dropbox)
        +-------------------+            |       |            +-------------------+
        |                   |    + +     | +---+ |            |                   |
  (---->| humans.txt.shard0 | - + D + ---> | D | |            |                   |
  |     |                   |    + +     | +---+ |            |                   |
  |     +-------------------+            |       |            +-------------------+
  |                                      |       |
  |                                      |       |
 +------------------+                    |       |                        +-----------------+
 |                  |                    |       |                        |                 |
 |  humans.txt      |                    |       |                        |                 |
 |                  |                    |       |                        |                 |
 +------------------+                    |       |                        +-----------------+
  |  combox directory                    |       |                      combox directory
  |                                      |       |
  |                                      |       |
  |     +-------------------+            |       |             +-------------------+
  |     |                   |    + +     | +---+ |             |                   |
  (---->| humans.txt.shard1 | - + G + ---> | G | |             |                   |
        |                   |    + +     | +---+ |             |                   |
        +-------------------+            |       |             +-------------------+
         node directory 1                @-------@              node directory 1
         (google drive)                                         (google drive)

  computer i                                                                    computer ii
  \end{semiverbatim}
  }

\end{frame}


\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0                Internet              node directory 0
         (dropbox)                       @-------@             (dropbox)
        +-------------------+            |       |            +-------------------+
        |                   |    + +     | +---+ |     + +    |                   |
  (---->| humans.txt.shard0 | - + D + ---> | D | |--> + D + - |                   |
  |     |                   |    + +     | +---+ |     + +    |                   |
  |     +-------------------+            |       |            +-------------------+
  |                                      |       |
  |                                      |       |
 +------------------+                    |       |                        +-----------------+
 |                  |                    |       |                        |                 |
 |  humans.txt      |                    |       |                        |                 |
 |                  |                    |       |                        |                 |
 +------------------+                    |       |                        +-----------------+
  |  combox directory                    |       |                      combox directory
  |                                      |       |
  |                                      |       |
  |     +-------------------+            |       |             +-------------------+
  |     |                   |    + +     | +---+ |      + +    |                   |
  (---->| humans.txt.shard1 | - + G + ---> | G | |---> + G + - |                   |
        |                   |    + +     | +---+ |      + +    |                   |
        +-------------------+            |       |             +-------------------+
         node directory 1                @-------@              node directory 1
         (google drive)                                         (google drive)

  computer i                                                                    computer ii
  \end{semiverbatim}
  }

\end{frame}


\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0                Internet              node directory 0
         (dropbox)                       @-------@             (dropbox)
        +-------------------+            |       |            +-------------------+
        |                   |    + +     | +---+ |     + +    |                   |
  (---->| humans.txt.shard0 | - + D + ---> | D | |--> + D + - | humans.txt.shard0 |
  |     |                   |    + +     | +---+ |     + +    |                   |
  |     +-------------------+            |       |            +-------------------+
  |                                      |       |
  |                                      |       |
 +------------------+                    |       |                        +-----------------+
 |                  |                    |       |                        |                 |
 |  humans.txt      |                    |       |                        |                 |
 |                  |                    |       |                        |                 |
 +------------------+                    |       |                        +-----------------+
  |  combox directory                    |       |                      combox directory
  |                                      |       |
  |                                      |       |
  |     +-------------------+            |       |             +-------------------+
  |     |                   |    + +     | +---+ |      + +    |                   |
  (---->| humans.txt.shard1 | - + G + ---> | G | |---> + G + - |                   |
        |                   |    + +     | +---+ |      + +    |                   |
        +-------------------+            |       |             +-------------------+
         node directory 1                @-------@              node directory 1
         (google drive)                                         (google drive)

  computer i                                                                    computer ii
  \end{semiverbatim}
  }

\end{frame}

\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0                Internet              node directory 0
         (dropbox)                       @-------@             (dropbox)
        +-------------------+            |       |            +-------------------+
        |                   |    + +     | +---+ |     + +    |                   |
  (---->| humans.txt.shard0 | - + D + ---> | D | |--> + D + - | humans.txt.shard0 |
  |     |                   |    + +     | +---+ |     + +    |                   |
  |     +-------------------+            |       |            +-------------------+
  |                                      |       |
  |                                      |       |
 +------------------+                    |       |                        +-----------------+
 |                  |                    |       |                        |                 |
 |  humans.txt      |                    |       |                        |                 |
 |                  |                    |       |                        |                 |
 +------------------+                    |       |                        +-----------------+
  |  combox directory                    |       |                      combox directory
  |                                      |       |
  |                                      |       |
  |     +-------------------+            |       |             +-------------------+
  |     |                   |    + +     | +---+ |      + +    |                   |
  (---->| humans.txt.shard1 | - + G + ---> | G | |---> + G + - | humans.txt.shard1 |
        |                   |    + +     | +---+ |      + +    |                   |
        +-------------------+            |       |             +-------------------+
         node directory 1                @-------@              node directory 1
         (google drive)                                         (google drive)

  computer i                                                                    computer ii
  \end{semiverbatim}
  }

\end{frame}


\begin{frame}[fragile]
  \frametitle{combox}

  {\tiny
  \begin{semiverbatim}

         node directory 0                Internet              node directory 0
         (dropbox)                       @-------@             (dropbox)
        +-------------------+            |       |            +-------------------+
        |                   |    + +     | +---+ |     + +    |                   |
  (---->| humans.txt.shard0 | - + D + ---> | D | |--> + D + - | humans.txt.shard0 |-------)
  |     |                   |    + +     | +---+ |     + +    |                   |       |
  |     +-------------------+            |       |            +-------------------+       |
  |                                      |       |                                        |
  |                                      |       |                                        v
 +------------------+                    |       |                        +-----------------+
 |                  |                    |       |                        |                 |
 |  humans.txt      |                    |       |                        | humans.txt      |
 |                  |                    |       |                        |                 |
 +------------------+                    |       |                        +-----------------+
  |  combox directory                    |       |                      combox directory  ^
  |                                      |       |                                        |
  |                                      |       |                                        |
  |     +-------------------+            |       |             +-------------------+      |
  |     |                   |    + +     | +---+ |      + +    |                   |      |
  (---->| humans.txt.shard1 | - + G + ---> | G | |---> + G + - | humans.txt.shard1 |------)
        |                   |    + +     | +---+ |      + +    |                   |
        +-------------------+            |       |             +-------------------+
         node directory 1                @-------@              node directory 1
         (google drive)                                         (google drive)

  computer i                                                                    computer ii
  \end{semiverbatim}
  }

\end{frame}

\begin{frame}
  \frametitle{Vollmar's Combo-Box}

  \begin{itemize}
  \item<1-> C\#
  \item<2-> SQL for tracking files
  \item<3-> Microsoft Windows program
  \end{itemize}

\end{frame}

\begin{frame}
  \frametitle{combox}

  \begin{itemize}
  \item<1-> python
  \item<2-> key-value data store for tracking files
  \item<3-> python package, runs on GNU/Linux and OS X
  \end{itemize}
\end{frame}