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Revised 2.7

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Jonatan Pålsson 2011-05-12 12:26:07 +02:00
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@ -662,7 +662,14 @@ textbf{Software failiure}}{A failiure in software (the GGS, the operating
\end_layout \end_layout
\begin_layout Section \begin_layout Section
Background Background
\begin_inset CommandInset label
LatexCommand label
name "sec:Background"
\end_inset
\end_layout \end_layout
\begin_layout Standard \begin_layout Standard
@ -2479,7 +2486,7 @@ name "sec:Scalability"
\begin_layout Standard \begin_layout Standard
Each instance of the GGS contains several tables. Each instance of the GGS contains several tables.
Each table is an isolated instance of a game, for example a chess game Each table is an isolated instance of a game, for instance a chess game
or a poker game. or a poker game.
The way that the GGS scales is to distribute these tables on different The way that the GGS scales is to distribute these tables on different
servers. servers.
@ -2490,11 +2497,11 @@ Each instance of the GGS contains several tables.
down at a new table, all within the same game session. down at a new table, all within the same game session.
Therefore, the main focus of the GGS is not to move players among tables, Therefore, the main focus of the GGS is not to move players among tables,
but to keep a player in a table, and to start new tables instead. but to keep a player in a table, and to start new tables instead.
When a server has reached a certain number of players the performance will When a server reaches a certain number of players the performance will
start to decrease. start to decrease, or worse, the server may even crash.
To avoid this the GGS will start new tables on another server, using this To avoid this the GGS will start new tables on another server, using this
technique the players will be close to evenly distributed among the servers. technique the players will be close to evenly distributed among the servers.
It is important to investigate and find out how many players that are optimal It is important to investigate and find out how many players are optimal
for each server. for each server.
This approach makes it possible to use all resources with moderate load, This approach makes it possible to use all resources with moderate load,
instead of having some resources with heavy load and some with almost no instead of having some resources with heavy load and some with almost no
@ -2502,16 +2509,23 @@ Each instance of the GGS contains several tables.
\end_layout \end_layout
\begin_layout Standard \begin_layout Standard
As mentioned in the purpose section there are two different types of scalability As mentioned in section
, structural scalability and load scalability. \begin_inset CommandInset ref
LatexCommand ref
reference "sec:Background"
\end_inset
there are two different types of scalability, structural scalability and
load scalability.
To make the GGS scalable both types of scalability are needed. To make the GGS scalable both types of scalability are needed.
Structural scalability means in our case that it should be possible to Structural scalability means in our case that it should be possible to
add more servers to an existing cluster of servers. add more servers to an existing cluster of servers.
By adding more servers the limits of how many users a system can have is By adding more servers the limits of how many users a system can have is
increased. increased.
Load scalability in contrast to structural scalability is not about how Load scalability in contrast to structural scalability is not about how
to increase the actual limits of the system. to increase the actual limits of the system, rather it means how good the
Instead it means how good the system handles increased load. system handles increased load.
The GGS should be able to scale well in both categories. The GGS should be able to scale well in both categories.
\end_layout \end_layout