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| <h1>Source code for pyspark.storagelevel</h1><div class="highlight"><pre> |
| <span></span><span class="c1">#</span> |
| <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one or more</span> |
| <span class="c1"># contributor license agreements. See the NOTICE file distributed with</span> |
| <span class="c1"># this work for additional information regarding copyright ownership.</span> |
| <span class="c1"># The ASF licenses this file to You under the Apache License, Version 2.0</span> |
| <span class="c1"># (the "License"); you may not use this file except in compliance with</span> |
| <span class="c1"># the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing, software</span> |
| <span class="c1"># distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="c1"># See the License for the specific language governing permissions and</span> |
| <span class="c1"># limitations under the License.</span> |
| <span class="c1">#</span> |
| |
| <span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">Any</span><span class="p">,</span> <span class="n">ClassVar</span> |
| |
| |
| <div class="viewcode-block" id="StorageLevel"><a class="viewcode-back" href="../../reference/api/pyspark.StorageLevel.html#pyspark.StorageLevel">[docs]</a><span class="k">class</span> <span class="nc">StorageLevel</span><span class="p">:</span> |
| |
| <span class="w"> </span><span class="sd">"""</span> |
| <span class="sd"> Flags for controlling the storage of an RDD. Each StorageLevel records whether to use memory,</span> |
| <span class="sd"> whether to drop the RDD to disk if it falls out of memory, whether to keep the data in memory</span> |
| <span class="sd"> in a JAVA-specific serialized format, and whether to replicate the RDD partitions on multiple</span> |
| <span class="sd"> nodes. Also contains static constants for some commonly used storage levels, MEMORY_ONLY.</span> |
| <span class="sd"> Since the data is always serialized on the Python side, all the constants use the serialized</span> |
| <span class="sd"> formats.</span> |
| <span class="sd"> """</span> |
| |
| <span class="n">NONE</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| <span class="n">DISK_ONLY</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| <span class="n">DISK_ONLY_2</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| <span class="n">DISK_ONLY_3</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| <span class="n">MEMORY_ONLY</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| <span class="n">MEMORY_ONLY_2</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| <span class="n">MEMORY_AND_DISK</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| <span class="n">MEMORY_AND_DISK_2</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| <span class="n">OFF_HEAP</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| <span class="n">MEMORY_AND_DISK_DESER</span><span class="p">:</span> <span class="n">ClassVar</span><span class="p">[</span><span class="s2">"StorageLevel"</span><span class="p">]</span> |
| |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span> |
| <span class="bp">self</span><span class="p">,</span> |
| <span class="n">useDisk</span><span class="p">:</span> <span class="nb">bool</span><span class="p">,</span> |
| <span class="n">useMemory</span><span class="p">:</span> <span class="nb">bool</span><span class="p">,</span> |
| <span class="n">useOffHeap</span><span class="p">:</span> <span class="nb">bool</span><span class="p">,</span> |
| <span class="n">deserialized</span><span class="p">:</span> <span class="nb">bool</span><span class="p">,</span> |
| <span class="n">replication</span><span class="p">:</span> <span class="nb">int</span> <span class="o">=</span> <span class="mi">1</span><span class="p">,</span> |
| <span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">useDisk</span> <span class="o">=</span> <span class="n">useDisk</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">useMemory</span> <span class="o">=</span> <span class="n">useMemory</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">useOffHeap</span> <span class="o">=</span> <span class="n">useOffHeap</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">deserialized</span> <span class="o">=</span> <span class="n">deserialized</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">replication</span> <span class="o">=</span> <span class="n">replication</span> |
| |
| <span class="k">def</span> <span class="fm">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> |
| <span class="k">return</span> <span class="s2">"StorageLevel(</span><span class="si">%s</span><span class="s2">, </span><span class="si">%s</span><span class="s2">, </span><span class="si">%s</span><span class="s2">, </span><span class="si">%s</span><span class="s2">, </span><span class="si">%s</span><span class="s2">)"</span> <span class="o">%</span> <span class="p">(</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">useDisk</span><span class="p">,</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">useMemory</span><span class="p">,</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">useOffHeap</span><span class="p">,</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">deserialized</span><span class="p">,</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">replication</span><span class="p">,</span> |
| <span class="p">)</span> |
| |
| <span class="k">def</span> <span class="fm">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span> |
| <span class="n">result</span> <span class="o">=</span> <span class="s2">""</span> |
| <span class="n">result</span> <span class="o">+=</span> <span class="s2">"Disk "</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">useDisk</span> <span class="k">else</span> <span class="s2">""</span> |
| <span class="n">result</span> <span class="o">+=</span> <span class="s2">"Memory "</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">useMemory</span> <span class="k">else</span> <span class="s2">""</span> |
| <span class="n">result</span> <span class="o">+=</span> <span class="s2">"OffHeap "</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">useOffHeap</span> <span class="k">else</span> <span class="s2">""</span> |
| <span class="n">result</span> <span class="o">+=</span> <span class="s2">"Deserialized "</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">deserialized</span> <span class="k">else</span> <span class="s2">"Serialized "</span> |
| <span class="n">result</span> <span class="o">+=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">x Replicated"</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">replication</span> |
| <span class="k">return</span> <span class="n">result</span> |
| |
| <span class="k">def</span> <span class="fm">__eq__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">:</span> <span class="n">Any</span><span class="p">)</span> <span class="o">-></span> <span class="nb">bool</span><span class="p">:</span> |
| <span class="k">return</span> <span class="p">(</span> |
| <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">StorageLevel</span><span class="p">)</span> |
| <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">useMemory</span> <span class="o">==</span> <span class="n">other</span><span class="o">.</span><span class="n">useMemory</span> |
| <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">useDisk</span> <span class="o">==</span> <span class="n">other</span><span class="o">.</span><span class="n">useDisk</span> |
| <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">useOffHeap</span> <span class="o">==</span> <span class="n">other</span><span class="o">.</span><span class="n">useOffHeap</span> |
| <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">deserialized</span> <span class="o">==</span> <span class="n">other</span><span class="o">.</span><span class="n">deserialized</span> |
| <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">replication</span> <span class="o">==</span> <span class="n">other</span><span class="o">.</span><span class="n">replication</span> |
| <span class="p">)</span></div> |
| |
| |
| <span class="n">StorageLevel</span><span class="o">.</span><span class="n">NONE</span> <span class="o">=</span> <span class="n">StorageLevel</span><span class="p">(</span><span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span> |
| <span class="n">StorageLevel</span><span class="o">.</span><span class="n">DISK_ONLY</span> <span class="o">=</span> <span class="n">StorageLevel</span><span class="p">(</span><span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span> |
| <span class="n">StorageLevel</span><span class="o">.</span><span class="n">DISK_ONLY_2</span> <span class="o">=</span> <span class="n">StorageLevel</span><span class="p">(</span><span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="mi">2</span><span class="p">)</span> |
| <span class="n">StorageLevel</span><span class="o">.</span><span class="n">DISK_ONLY_3</span> <span class="o">=</span> <span class="n">StorageLevel</span><span class="p">(</span><span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="mi">3</span><span class="p">)</span> |
| <span class="n">StorageLevel</span><span class="o">.</span><span class="n">MEMORY_ONLY</span> <span class="o">=</span> <span class="n">StorageLevel</span><span class="p">(</span><span class="kc">False</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span> |
| <span class="n">StorageLevel</span><span class="o">.</span><span class="n">MEMORY_ONLY_2</span> <span class="o">=</span> <span class="n">StorageLevel</span><span class="p">(</span><span class="kc">False</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="mi">2</span><span class="p">)</span> |
| <span class="n">StorageLevel</span><span class="o">.</span><span class="n">MEMORY_AND_DISK</span> <span class="o">=</span> <span class="n">StorageLevel</span><span class="p">(</span><span class="kc">True</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">)</span> |
| <span class="n">StorageLevel</span><span class="o">.</span><span class="n">MEMORY_AND_DISK_2</span> <span class="o">=</span> <span class="n">StorageLevel</span><span class="p">(</span><span class="kc">True</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="mi">2</span><span class="p">)</span> |
| <span class="n">StorageLevel</span><span class="o">.</span><span class="n">OFF_HEAP</span> <span class="o">=</span> <span class="n">StorageLevel</span><span class="p">(</span><span class="kc">True</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span> |
| <span class="n">StorageLevel</span><span class="o">.</span><span class="n">MEMORY_AND_DISK_DESER</span> <span class="o">=</span> <span class="n">StorageLevel</span><span class="p">(</span><span class="kc">True</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span> |
| </pre></div> |
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