////////////////////////////////////////////////////////////////////////////////
/// @brief reference manual
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2012 triagens GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
///     http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is triAGENS GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
/// @author Copyright 2012, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////////
/// @page RefManual ArangoDB Reference Manual
///
/// @if LATEX
/// <ul>
///  <li>@ref RestDocument</li>
///  <li>@ref RestEdge</li>
///  <li>@ref HttpCursor</li>
///  <li>@ref HttpSimple</li>
///  <li>@ref HttpCollection</li>
///  <li>@ref HttpIndex</li>
///  <li>@ref HttpSystem</li>
///  <li>@ref Glossary</li>
/// </ul>
/// @else
/// <ul>
///  <li>@ref CommandLine
///   @copydetails CommandLineSubTOC
///  </li>
///  <li>@ref JSModules
///   <ul>
///    <li>User Modules
///     <ul>
///      <li>@ref JSModuleGraph</li>
///     </ul>
///    </li>
///    <li>System Modules
///     <ul>
///      <li>@ref JSModuleActions</li>
///      <li>@ref JSModuleConsole</li>
///      <li>@ref JSModuleFs</li>
///      <li>@ref JSModuleInternal</li>
///     </ul>
///    </li>
///   </ul>
///  </li>
///  <li>@ref OTWP
///   <ul>
///    <li>REST Interface
///     <ul>
///      <li>@ref RestDocument</li>
///      <li>@ref RestEdge</li>
///     </ul>
///    </li>
///    <li>Light-Weight HTTP for Queries
///     <ul>
///      <li>@ref HttpCursor</li>
///      <li>@ref HttpSimple</li>
///     </ul>
///    </li>
///    <li>Light-Weight HTTP for Administration
///     <ul>
///      <li>@ref HttpCollection</li>
///      <li>@ref HttpIndex</li>
///      <li>@ref HttpSystem</li>
///     </ul>
///    </li>
///   </ul>
///  </li>
///  <li>Shell Commands
///   <ul>
///      <li>@ref ShellDocument</li>
///      <li>@ref ShellEdge</li>
///      <li>@ref ShellCollection</li>
///      <li>@ref ShellIndex</li>
///   </ul>
///  </li>
///  <li>Indexes
///   @copydetails IndexesTOC
///  </li>
///  <li>Advanced Topics
///   <ul>
///    <li>@ref ArangoErrors
///    </li>
///    <li>@ref DBAdmin
///     <ul>
///      <li>@ref DBAdminDurability
///      </li>
///     </ul>
///    </li>
///    <li>Actions
///     <ul>
///      <li>@ref Actions
///      </li>
///      <li>@ref DefineAction
///      </li>
///     </ul>
///    </li>
///    <li>@ref jsUnity
///    </li>
///   </ul>
///  </li>
/// </ul>
/// @endif
////////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////////
/// @page DBAdminTOC
///
/// <ul>
///  <li>@ref DBAdminDurability
///  </li>
/// </ul>
////////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////////
/// @page DBAdmin Database Administration
///
/// <hr>
/// @copydetails DBAdminTOC
/// <hr>
///
/// @section DBAdminDurability Durability
/////////////////////////////////////////
///
/// @subsection DBAdminDurability1 Mostly Memory/Durability
///////////////////////////////////////////////////////////
///
/// Database documents are stored in the memory-memory-mapped files are used to
/// store them. The operating system has the advantageous option to decide
/// swapping sparsely used areas out of the main memory. Per default, these
/// memory-mapped files are synced frequently - advantageously storing all
/// documents securely at once (durability).
///
/// @subsection DBAdminDurability2 AppendOnly/MVCC
//////////////////////////////////////////////////
/// 
/// Instead of overwriting existing documents, a completely new version of the
/// document is generated. The two benefits are:
///
/// - Objects can be stored coherently and compactly in the main memory.
/// - Objects are preserved-isolated writing and reading transactions allow
///   accessing these objects for parallel operations.
///
/// The system collects obsolete versions as garbage, recognizing them as
/// forsaken. Garbage collection is asynchronous and runs parallel to other
/// processes.
///
/// @subsection DBAdminDurability3 Configuration
////////////////////////////////////////////////
///
/// @copydetails JS_PropertiesVocbaseCol
////////////////////////////////////////////////////////////////////////////////

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