content/docs/r3.3.1/api/org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html - hadoop-site - Git at Google

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 <h2 title="Enum ReservationRequestInterpreter" class="title">Enum ReservationRequestInterpreter</h2>
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 <li>org.apache.hadoop.yarn.api.records.ReservationRequestInterpreter</li>
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 <pre>@InterfaceAudience.Public
  @InterfaceStability.Evolving
 public enum <span class="typeNameLabel">ReservationRequestInterpreter</span>
 extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang">Enum</a>&lt;<a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html" title="enum in org.apache.hadoop.yarn.api.records">ReservationRequestInterpreter</a>&gt;</pre>
 <div class="block">Enumeration of various types of dependencies among multiple
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequests.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequests</code></a> within one <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> (from
  least constraining to most constraining).</div>
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 <caption><span>Enum Constants</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colOne" scope="col">Enum Constant and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html#R_ALL">R_ALL</a></span></code>
 <div class="block">Requires that ALL of the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> submitted as part of a
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> are satisfied for the overall
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> to be satisfied.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html#R_ANY">R_ANY</a></span></code>
 <div class="block">Requires that exactly ONE among the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> submitted as
  of a <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> is satisfied to satisfy the overall
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a>.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html#R_ORDER">R_ORDER</a></span></code>
 <div class="block">Requires that ALL of the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> submitted as part of a
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> are satisfied for the overall
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> to be satisfied.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html#R_ORDER_NO_GAP">R_ORDER_NO_GAP</a></span></code>
 <div class="block">Requires that ALL of the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> submitted as part of a
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> are satisfied for the overall
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> to be satisfied.</div>
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 <td class="colFirst"><code>static <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html" title="enum in org.apache.hadoop.yarn.api.records">ReservationRequestInterpreter</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html#valueOf-java.lang.String-">valueOf</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</code>
 <div class="block">Returns the enum constant of this type with the specified name.</div>
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 <td class="colFirst"><code>static <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html" title="enum in org.apache.hadoop.yarn.api.records">ReservationRequestInterpreter</a>[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html#values--">values</a></span>()</code>
 <div class="block">Returns an array containing the constants of this enum type, in
 the order they are declared.</div>
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 <pre>public static final&nbsp;<a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html" title="enum in org.apache.hadoop.yarn.api.records">ReservationRequestInterpreter</a> R_ANY</pre>
 <div class="block">Requires that exactly ONE among the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> submitted as
  of a <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> is satisfied to satisfy the overall
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a>.
  <p>
  WHEN TO USE THIS: This is useful when the user have multiple equivalent
  ways to run an application, and wants to expose to the ReservationAgent
  such flexibility. For example an application could use one
  &lt;32GB,16core&gt; container for 10min, or 16 &lt;2GB,1core&gt;
  containers for 15min, the ReservationAgent will decide which one of the
  two it is best for the system to place.</div>
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 <pre>public static final&nbsp;<a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html" title="enum in org.apache.hadoop.yarn.api.records">ReservationRequestInterpreter</a> R_ALL</pre>
 <div class="block">Requires that ALL of the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> submitted as part of a
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> are satisfied for the overall
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> to be satisfied. No constraints are imposed
  on the temporal ordering of the allocation used to satisfy the
  ResourceRequests.
  <p>
  WHEN TO USE THIS: This is useful to capture a scenario in which the user
  cares for multiple ReservationDefinition to be all accepted, or none. For
  example, a user might want a reservation R1: with 10 x
  &lt;8GB,4core&gt; for 10min, and a reservation R2:
  with 2 &lt;1GB,1core&gt; for 1h, and only if both are satisfied
  the workflow run in this reservation succeeds. The key differentiator
  from ALL and ORDER, ORDER_NO_GAP, is that ALL imposes no restrictions
  on the relative allocations used to place R1 and R2 above.</div>
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 <pre>public static final&nbsp;<a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html" title="enum in org.apache.hadoop.yarn.api.records">ReservationRequestInterpreter</a> R_ORDER</pre>
 <div class="block">Requires that ALL of the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> submitted as part of a
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> are satisfied for the overall
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> to be satisfied. Moreover, it imposes a
  strict temporal ordering on the allocation used to satisfy the
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a>s. The allocations satisfying the
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> in position k must strictly precede the
  allocations for the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> at position k+1. No
  constraints are imposed on temporal gaps between subsequent allocations
  (the last instant of the previous allocation can be an arbitrary long
  period of time before the first instant of the subsequent allocation).
  <p>
  WHEN TO USE THIS: Like ALL this requires all ReservationDefinitions to be
  placed, but it also imposes a time ordering on the allocations used. This
  is important if the ReservationDefinition(s) are used to describe a
  workflow with inherent inter-stage dependencies. For example, a first job
  runs in a ReservaitonDefinition R1 (10 x &lt;1GB,1core&gt;
  for 20min), and its output is consumed by a second job described by
  a ReservationDefinition R2 (5 x &lt;1GB,1core&gt;) for 50min).
  R2 allocation cannot overlap R1, as R2 models a job depending on
  the output of the job modeled by R1.</div>
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 <pre>public static final&nbsp;<a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html" title="enum in org.apache.hadoop.yarn.api.records">ReservationRequestInterpreter</a> R_ORDER_NO_GAP</pre>
 <div class="block">Requires that ALL of the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> submitted as part of a
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> are satisfied for the overall
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationDefinition.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationDefinition</code></a> to be satisfied. Moreover, it imposes a
  strict temporal ordering on the allocation used to satisfy the
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a>s. It imposes a strict temporal ordering on the
  allocation used to satisfy the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a>s. The allocations
  satisfying the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> in position k must strictly
  precede the allocations for the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> at position k+1.
  Moreover it imposes a "zero-size gap" between subsequent allocations, i.e.,
  the last instant in time of the allocations associated with the
  <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> at position k must be exactly preceding the
  first instant in time of the <a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequest.html" title="class in org.apache.hadoop.yarn.api.records"><code>ReservationRequest</code></a> at position k+1.
  Time ranges are interpreted as [a,b) inclusive left, exclusive right.

  WHEN TO USE THIS: This is a stricter version of R_ORDER, which allows no
  gaps between the allocations that satisfy R1 and R2. The use of this is
  twofold: 1) prevent long gaps between subsequent stages that produce very
  large intermediate output (e.g., the output of R1 is too large to be kept
  around for long before the job running in R2 consumes it, and disposes of
  it), 2) if the job being modeled has a time-varying resource need, one can
  combine multiple ResourceDefinition each approximating a portion of the job
  execution (think of using multiple rectangular bounding boxes to described
  an arbitrarily shaped area). By asking for no-gaps we guarantee
  "continuity" of resources given to this job. This still allow for some
  flexibility, as the entire "train" of allocations can be moved rigidly back
  or forth within the start-deadline time range (if there is slack).</div>
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 <pre>public static&nbsp;<a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html" title="enum in org.apache.hadoop.yarn.api.records">ReservationRequestInterpreter</a>[]&nbsp;values()</pre>
 <div class="block">Returns an array containing the constants of this enum type, in
 the order they are declared.  This method may be used to iterate
 over the constants as follows:
 <pre>
 for (ReservationRequestInterpreter c : ReservationRequestInterpreter.values())
 &nbsp;   System.out.println(c);
 </pre></div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>an array containing the constants of this enum type, in the order they are declared</dd>
 </dl>
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 <h4>valueOf</h4>
 <pre>public static&nbsp;<a href="../../../../../../org/apache/hadoop/yarn/api/records/ReservationRequestInterpreter.html" title="enum in org.apache.hadoop.yarn.api.records">ReservationRequestInterpreter</a>&nbsp;valueOf(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;name)</pre>
 <div class="block">Returns the enum constant of this type with the specified name.
 The string must match <i>exactly</i> an identifier used to declare an
 enum constant in this type.  (Extraneous whitespace characters are
 not permitted.)</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>name</code> - the name of the enum constant to be returned.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the enum constant with the specified name</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if this enum type has no constant with the specified name</dd>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if the argument is null</dd>
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