Added Purpose, descrition of structural and load scalability

doc/report/report.lyx

@@ -86,7 +86,7 @@
 \secnumdepth 2
 \tocdepth 2
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-\defskip smallskip
+\defskip medskip
 \quotes_language english
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@@ -323,7 +323,23 @@ Background
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 \begin_layout Section
-Purpose 
+Purpose
+\end_layout
+
+\begin_layout Standard
+The purpose of the GGS project is to create a scalable and fault tolerant
+ server, while still allowing the server to be as generic as possible.
+ These three italicised terms need some explanation.
+\end_layout
+
+\begin_layout Standard
+Scalability in computer science is a large topic and is commonly divided
+ into sub-fields, two of which are structural scalability and load scalability.
+ These two issues are addressed in this thesis.
+ Structural scalability means expanding an architecture, e.g.
+ adding nodes to a system, without requiring modification of the system.
+ Load scalability means using the available resources in a way which allows
+ handling increasing load, e.g more users, gracefully.
 \end_layout
 
 \begin_layout Section
@@ -985,7 +1001,7 @@ Understanding OTP
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 \begin_layout Section
-Usability 
+Usability
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 \begin_layout Chapter
@@ -997,7 +1013,7 @@ Software development methodology
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-Statistics 
+Statistics
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 \begin_layout Chapter