SOLR：-1的autoSoftCommit maxtime是什么意思？

这里是默认的从我的solrconfig.xml中文件设置：SOLR：-1的autoSoftCommit maxtime是什么意思？

<autoSoftCommit> 
    <maxTime>${solr.autoSoftCommit.maxTime:-1}</maxTime> 
</autoSoftCommit>

是否的MAXTIME“-1”意味着自动软提交熄灭？如果是这样，如果我完全删除了标签，我会得到相同的结果吗？如果我必须手动进行软提交，可以用'commitWithin'来完成（我使用了这个，但得到了相互矛盾的答案）？

哦，我使用的Solr 4.5.0

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2013-11-21 Wrael

首先，你可以看到标签内表达${solr.autoSoftCommit.maxTime:-1}。这使您可以使用Solr的变量替换。详细描述该功能here in the reference。如果该变量未被任何这些手段取代，则将-1作为该配置的值。

将commitMaxTime设置为-1可以有效地关闭自动提交。如果您查看下面的相关代码，可以看到commitMaxTime否决了maxDocs的任何值，因为scheduleCommitWithin方法立即返回。我没有发现这种行为记录，所以我查了代码。

private void _scheduleCommitWithin(long commitMaxTime) { 
    if (commitMaxTime <= 0) return; 
    synchronized (this) { 
     if (pending != null && pending.getDelay(TimeUnit.MILLISECONDS) <= commitMaxTime) { 
     // There is already a pending commit that will happen first, so 
     // nothing else to do here. 
     // log.info("###returning since getDelay()==" + pending.getDelay(TimeUnit.MILLISECONDS) + " less than " + commitMaxTime); 

     return; 
     } 

     if (pending != null) { 
     // we need to schedule a commit to happen sooner than the existing one, 
     // so lets try to cancel the existing one first. 
     boolean canceled = pending.cancel(false); 
     if (!canceled) { 
      // It looks like we can't cancel... it must have just started running! 
      // this is possible due to thread scheduling delays and a low commitMaxTime. 
      // Nothing else to do since we obviously can't schedule our commit *before* 
      // the one that just started running (or has just completed). 
      // log.info("###returning since cancel failed"); 
      return; 
     } 
     } 

     // log.info("###scheduling for " + commitMaxTime); 

     // schedule our new commit 
     pending = scheduler.schedule(this, commitMaxTime, TimeUnit.MILLISECONDS); 
    } 
}

从https://github.com/apache/lucene-solr/blob/lucene_solr_4_5/solr/core/src/java/org/apache/solr/update/CommitTracker.java

带到你的问题的第二部分，如果你删除标记都在一起，这将有相同的结果值设置为-1。正如你在下面看到的，如果xpath表达式返回null，你会得到-1作为默认值。

但是从配置中删除整个表达式还将删除通过Solr的变量替换覆盖该配置的选项。

protected UpdateHandlerInfo loadUpdatehandlerInfo() { 
    return new UpdateHandlerInfo(get("updateHandler/@class",null), 
    getInt("updateHandler/autoCommit/maxDocs",-1), 
    getInt("updateHandler/autoCommit/maxTime",-1), 
    getBool("updateHandler/autoCommit/openSearcher",true), 
    getInt("updateHandler/commitIntervalLowerBound",-1), 
    getInt("updateHandler/autoSoftCommit/maxDocs",-1), 
    getInt("updateHandler/autoSoftCommit/maxTime",-1), 
    getBool("updateHandler/commitWithin/softCommit",true)); 
}

从https://github.com/apache/lucene-solr/blob/lucene_solr_4_5/solr/core/src/java/org/apache/solr/core/SolrConfig.java

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2013-11-22 06:36:46 cheffe

SOLR：-1的autoSoftCommit maxtime是什么意思？

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