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diff --git a/doc/html/issues.html b/doc/html/issues.html index e1bb108..d9c1612 100644 --- a/doc/html/issues.html +++ b/doc/html/issues.html @@ -1,5 +1,3 @@ - - <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> @@ -8,15 +6,15 @@ <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> - <title>Known Issues — S3QL 1.16 documentation</title> + <title>Known Issues — S3QL 2.5 documentation</title> <link rel="stylesheet" href="_static/sphinxdoc.css" type="text/css" /> <link rel="stylesheet" href="_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { - URL_ROOT: '', - VERSION: '1.16', + URL_ROOT: './', + VERSION: '2.5', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true @@ -26,7 +24,7 @@ <script type="text/javascript" src="_static/underscore.js"></script> <script type="text/javascript" src="_static/doctools.js"></script> <link rel="author" title="About these documents" href="about.html" /> - <link rel="top" title="S3QL 1.16 documentation" href="index.html" /> + <link rel="top" title="S3QL 2.5 documentation" href="index.html" /> <link rel="next" title="Manpages" href="man/index.html" /> <link rel="prev" title="Tips & Tricks" href="tips.html" /> </head> @@ -40,7 +38,7 @@ <li class="right" > <a href="tips.html" title="Tips & Tricks" accesskey="P">previous</a> |</li> - <li><a href="index.html">S3QL 1.16 documentation</a> »</li> + <li><a href="index.html">S3QL 2.5 documentation</a> »</li> </ul> </div> <div class="sphinxsidebar"> @@ -91,15 +89,24 @@ <div class="section" id="known-issues"> <h1>Known Issues<a class="headerlink" href="#known-issues" title="Permalink to this headline">ΒΆ</a></h1> <ul> +<li><p class="first">S3QL de-duplicates data blocks based solely only on SHA256 +checksums, without doing a byte-by-byte comparison of the blocks. +Since it is possible for two data blocks to have the same checksum +despite having different contents, this can lead to problems. If two +such blocks are stored in an S3QL file system, the data in one block +will be lost and replaced by the data in the other block. However, +the chances of this occuring for any two blocks are about 1 in 10^77 +(2^256). For a file system that holds a total of 10^34 blocks, the +chances of a collision increase to about 1 in 10^9. Storing more +than 10^34 blocks (or about 10^25 TB with an (extremely small) block +size of 4 kB) is therefore not recommended. Being exceptionally +unlucky may also be a disadvantage.</p> +</li> <li><p class="first">S3QL does not support Access Control Lists (ACLs). This is due to a bug in the FUSE library and will therefore hopefully be fixed at some point. See <a class="reference external" href="http://code.google.com/p/s3ql/issues/detail?id=385">issue 385</a> for more details.</p> </li> -<li><p class="first">S3QL 1.x does not verify TLS/SSL server certificates and is thus -vulnerable to man-in-the-middle attacks (S3QL versions after 2.0 -do not have this problem but require Python 3.3 or newer).</p> -</li> <li><p class="first">S3QL is rather slow when an application tries to write data in unreasonably small chunks. If a 1 MiB file is copied in chunks of 1 KB, this will take more than 10 times as long as when it’s copied @@ -177,12 +184,12 @@ entity expansion attacks</a>.</p> <li class="right" > <a href="tips.html" title="Tips & Tricks" >previous</a> |</li> - <li><a href="index.html">S3QL 1.16 documentation</a> »</li> + <li><a href="index.html">S3QL 2.5 documentation</a> »</li> </ul> </div> <div class="footer"> - © Copyright 2008-2011, Nikolaus Rath. - Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.1.3. + © Copyright 2008-2013, Nikolaus Rath. + Created using <a href="http://sphinx-doc.org/">Sphinx</a> 1.2b1. </div> </body> </html>
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