NEST弹性搜索Reindex示例

问题描述

我的目标是使用1000万个分片重新索引索引，以改变字段映射，以便进行重要的术语分析。我的问题是我遇到麻烦使用NEST库执行重新索引，文档（非常）受限制。如果可能，我需要使用以下的例子：

解决方案

NEST提供了一个不错的 Reindex 方法，尽管文档不足。我已经用这个特殊的WinForms代码，以非常粗糙和准备的方式使用它。

  private ElasticClient客户端; 
私人双数; 
 
 private void reindex_Completed（）
 {
 MessageBox.Show（Done！）; 
} 
 
 private void reindex_Next（IReindexResponse< object> obj）
 {
 count + = obj.BulkResponse.Items.Count（）; 
 var progress = 100 * count /（double）obj.SearchResponse.Total; 
 progressBar1.Value =（int）progress; 
} 
 
 private void reindex_Error（Exception ex）
 {
 MessageBox.Show（ex.ToString（））; 
} 
 
 private void button1_Click（object sender，EventArgs e）
 {
 count = 0; 
 
 var reindex = client.Reindex< object>（r => r.FromIndex（fromIndex.Text）.NewIndexName（toIndex.Text）.Scroll（10s））; 
 
 var o = new ReindexObserver< object>（onError：reindex_Error，onNext：reindex_Next，completed：reindex_Completed）; 
 reindex.Subscribe（o）; 
} 
  

我刚刚发现了博客帖子，告诉我如何做：

my objective is to reindex an index with 10 million shards for the purposes of changing field mappings to facilitate significant terms analysis.

My problem is that I am having trouble using the NEST library to perform a re-index, and the documentation is (very) limited. If possible I need an example of the following in use:

http://nest.azurewebsites.net/nest/search/scroll.html

http://nest.azurewebsites.net/nest/core/bulk.html

解决方案

NEST provides a nice Reindex method you can use, although the documentation is lacking. I've used it in a very rough-and-ready fashion with this ad-hoc WinForms code.

    private ElasticClient client;
    private double count;

    private void reindex_Completed()
    {
        MessageBox.Show("Done!");
    }

    private void reindex_Next(IReindexResponse<object> obj)
    {
        count += obj.BulkResponse.Items.Count();
        var progress = 100 * count / (double)obj.SearchResponse.Total;
        progressBar1.Value = (int)progress;
    }

    private void reindex_Error(Exception ex)
    {
        MessageBox.Show(ex.ToString());
    }

    private void button1_Click(object sender, EventArgs e)
    {
        count = 0;

        var reindex = client.Reindex<object>(r => r.FromIndex(fromIndex.Text).NewIndexName(toIndex.Text).Scroll("10s"));

        var o = new ReindexObserver<object>(onError: reindex_Error, onNext: reindex_Next, completed: reindex_Completed);
        reindex.Subscribe(o);
    }

And I've just found the blog post that showed me how to do it: http://thomasardal.com/elasticsearch-migrations-with-c-and-nest/

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