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  <div class="section" id="openmpi">
<span id="openmpi"></span><h1>在OpenMPI集群中启动训练<a class="headerlink" href="#openmpi" title="永久链接至标题">¶</a></h1>
<div class="section" id="openmpi">
<span id="id1"></span><h2>准备OpenMPI集群<a class="headerlink" href="#openmpi" title="永久链接至标题">¶</a></h2>
<p>执行下面的命令以启动3个节点的OpenMPI集群和一个&#8221;head&#8221;节点：</p>
<div class="highlight-bash"><div class="highlight"><pre><span></span>paddle/scripts/cluster_train_v2/openmpi/docker_cluster
kubectl create -f head.yaml
kubectl create -f mpi-nodes.yaml
</pre></div>
</div>
<p>然后可以从head节点ssh无密码登录到OpenMPI的每个节点上。</p>
</div>
<div class="section" id="">
<span id="id2"></span><h2>启动集群作业<a class="headerlink" href="#" title="永久链接至标题">¶</a></h2>
<p>您可以按照下面的步骤在OpenMPI集群中提交paddle训练任务：</p>
<div class="highlight-bash"><div class="highlight"><pre><span></span><span class="c1"># 获得head和node节点的IP地址</span>
kubectl get po -o wide
<span class="c1"># 将node节点的IP地址保存到machines文件中</span>
kubectl get po -o wide <span class="p">|</span> grep nodes <span class="p">|</span> awk <span class="s1">&#39;{print $6}&#39;</span> &gt; machines
<span class="c1"># 拷贝必要的文件到head节点</span>
scp -i ssh/id_rsa.mpi.pub machines prepare.py train.py start_mpi_train.sh tutorial@<span class="o">[</span>headIP<span class="o">]</span>:~
<span class="c1"># ssh 登录到head节点</span>
ssh -i ssh/id_rsa.mpi.pub tutorial@<span class="o">[</span>headIP<span class="o">]</span>
<span class="c1"># --------------- 以下操作均在head节点中执行 ---------------</span>
<span class="c1"># 准备训练数据</span>
python prepare.py
<span class="c1"># 拷贝训练程序和字典文件到每台MPI节点</span>
cat machines <span class="p">|</span> xargs -i scp word_dict.pickle train.py start_mpi_train.sh machines <span class="o">{}</span>:/home/tutorial
<span class="c1"># 创建日志目录</span>
mpirun -hostfile machines -n <span class="m">3</span> mkdir /home/tutorial/logs
<span class="c1"># 拷贝训练数据到各自的节点</span>
scp train.txt-00000 test.txt-00000 <span class="o">[</span>node1IP<span class="o">]</span>:/home/tutorial
scp train.txt-00001 test.txt-00001 <span class="o">[</span>node2IP<span class="o">]</span>:/home/tutorial
scp train.txt-00002 test.txt-00002 <span class="o">[</span>node3IP<span class="o">]</span>:/home/tutorial
<span class="c1"># 启动训练任务</span>
mpirun -hostfile machines -n <span class="m">3</span>  /home/tutorial/start_mpi_train.sh
</pre></div>
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