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author Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
date Sat, 12 Apr 2008 20:32:36 -0400
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-1:000000000000 0:4cff88ac3e44
1 \documentclass{beamer}
2
3 \usepackage{beamerthemeshadow}
4
5 \title{XFS --- The Black Leather Jacket of filesystems}
6 \author{Josef ``Jeff'' Sipek\\ $<$jeffpc@josefsipek.net$>$}
7 \date{July 8, 2008}
8
9 \begin{document}
10 \frame{\titlepage}
11
12 \AtBeginSection[]
13 {
14 \begin{frame}
15 \frametitle{Outline}
16 \tableofcontents[currentsection]
17 \end{frame}
18 }
19
20 \section{History}
21 \begin{frame}
22 \frametitle{History: Stoneage (1992)}
23 \begin{itemize}
24 \item Berkeley's FFS was state of the art
25 \item IRIX had EFS (FFS with extents)
26 \item Many limitations
27 \begin{itemize}
28 \item Small file sizes (2 GB)
29 \item Small filesystem sizes (8GB)
30 \item Statically allocated metadata
31 \item Long recovery times
32 \item Slow operations on large directories
33 \item No extended attributes
34 \item No access control lists
35 \end{itemize}
36 \end{itemize}
37 \end{frame}
38
39 \begin{frame}
40 \frametitle{History: Enlightment (1993)}
41 \begin{center}
42 \includegraphics[width=0.8\textwidth]{sgi.eps}
43 \end{center}
44 \end{frame}
45
46 %
47 % Features
48 %
49 \section{Features}
50 \begin{frame}
51 \frametitle{Features: Allocation}
52 \begin{itemize}
53 \item Delayed allocation
54 \begin{itemize}
55 \item Allocate on flush
56 \item Write reserves disk space, decide where later
57 \end{itemize}
58 \item Pre-allocation
59 \begin{itemize}
60 \item Reserve space before it is written
61 \item Minimizes fragmentation
62 \end{itemize}
63 \item Direct I/O support
64 \item Stripe aware allocator
65 \end{itemize}
66 \end{frame}
67
68 \begin{frame}
69 \frametitle{Features: Inodes}
70 \begin{itemize}
71 \item Dynamically allocated in clusters
72 \item Inode size is mkfs option
73 \begin{itemize}
74 \item 256 Byte (default) -- 4 kByte (max)
75 \end{itemize}
76 \item Extended Attributes
77 \begin{itemize}
78 \item name=value pairs
79 \item Used by ACLs, Capabilities, SELinux, DMAPI
80 \end{itemize}
81 \end{itemize}
82 \end{frame}
83
84 \begin{frame}
85 \frametitle{Features: Other}
86 \begin{itemize}
87 \item B+ Trees
88 \item 64-bit
89 \item Variable block size (512 Bytes -- 64 kB)
90 \item Allocation Groups
91 \item Lots of utilities
92 \item Direct I/O
93 \item DMAPI
94 \item EA/ACL
95 \item online fs growth
96 \item amazingly fast
97 \end{itemize}
98 \end{frame}
99
100 \begin{frame}
101 \frametitle{Why use it?}
102 \begin{itemize}
103 \item Stable, mature codebase
104 \begin{itemize}
105 \item oldest journaling filesystem on Linux
106 \end{itemize}
107 \item Very well performing
108 \item DMAPI support
109 \item Good support for EAs / ACLs
110 \end{itemize}
111 \end{frame}
112
113 \begin{frame}
114 \frametitle{Why \emph{not} use it?}
115 \begin{itemize}
116 \item No data journaling
117 \item Got time to waste
118 \end{itemize}
119 \end{frame}
120
121 %
122 % Demos
123 %
124 \section{Demos}
125 \begin{frame}
126 \frametitle{\texttt{\textbf{xfsdump}}}
127 xfsdump ...
128 \end{frame}
129
130 \begin{frame}
131 \frametitle{\texttt{\textbf{xfsrestore}}}
132 xfsrestore ...
133 \end{frame}
134
135 \begin{frame}
136 \frametitle{\texttt{\textbf{mkfs/mount}}}
137 mkfs/mount
138 \end{frame}
139
140 \begin{frame}
141 \frametitle{\texttt{\textbf{xfs\_growfs}}}
142 xfs\_growfs ...
143 \end{frame}
144
145 \begin{frame}
146 \frametitle{\texttt{\textbf{xfs\_freeze}}}
147 freeze / unfreeze
148 \end{frame}
149
150 \begin{frame}
151 \frametitle{\texttt{\textbf{xfs\_check}} \& \texttt{\textbf{xfs\_repair}}}
152 check / repair
153 \end{frame}
154
155 \begin{frame}
156 \frametitle{\texttt{\textbf{xfs\_io}}}
157 xfs\_io ...
158 \end{frame}
159
160 \begin{frame}
161 \frametitle{\texttt{\textbf{xfs\_quota}}}
162 xfs\_quota ...
163 \end{frame}
164
165 \begin{frame}
166 \frametitle{\texttt{\textbf{xfs\_admin}}}
167 xfs\_admin ...
168 \end{frame}
169
170 \begin{frame}
171 \frametitle{\texttt{\textbf{xfs\_bmap}}}
172 xfs\_bmap ...
173 \end{frame}
174 %
175 % Wrap-up
176 %
177 \section{}
178 \begin{frame}
179 \frametitle{Questions?}
180 \begin{center}
181 \includegraphics[width=\textwidth]{xfs.eps}
182 \end{center}
183 \end{frame}
184
185 \begin{frame}
186 \frametitle{More info}
187 \begin{itemize}
188 \item \url{http://oss.sgi.com/projects/xfs/}
189 \item \url{xfs@oss.sgi.com}
190 \item \url{http://oss.sgi.com/projects/xfs/papers/ukuug2003.pdf}
191 \end{itemize}
192 \end{frame}
193
194 \end{document}