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Diffstat (limited to 'doc/html/Chunking.html')
| -rw-r--r-- | doc/html/Chunking.html | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/doc/html/Chunking.html b/doc/html/Chunking.html index 38670a8..0939d59 100644 --- a/doc/html/Chunking.html +++ b/doc/html/Chunking.html @@ -58,6 +58,7 @@ <li><a href="#S3">3. Cache Efficiency</a> <li><a href="#S4">4. Fragmentation</a> <li><a href="#S5">5. File Storage Overhead</a> + <li><a href="#S6">6. Chunk Compression</a> </ul> <h2><a name="S1">1. Introduction</a></h2> @@ -215,7 +216,22 @@ <code>H5Pset_istore_k()</code> (increasing the out degree actually increases file overhead while decreasing the number of nodes). - <hr> + + <h2><a name="S6">6. Chunk Compression</a></h2> + + <p>Dataset chunks can be compressed through the use of filters. + See the chapter “<a href="Filters.html">Filters in HDF5</a>.” + + <p>Reading and rewriting compressed chunked data can result in holes + in an HDF5 file. In time, enough such holes can increase the + file size enough to impair application or library performance + when working with that file. See + “<a href="Performance.html#Freespace">Freespace Management</a>” + in the chapter + “<a href="Performance.html">Performance Analysis and Issues</a>.” + + +<hr> <p><a name="fn1">Footnote 1:</a> Parallel versions of the library can access individual bytes of a chunk when the underlying file @@ -224,7 +240,6 @@ <p><a name="fn2">Footnote 2:</a> The raw data chunk cache was added before the second alpha release. - <hr> <center> <table border=0 width=98%> @@ -273,7 +288,7 @@ <!-- Created: Tue Oct 20 12:38:40 EDT 1998 --> <!-- hhmts start --> -Last modified: 16 February 2001 +Last modified: 11 July 2001 <!-- hhmts end --> <br> |