python-如何使用elasticsearch.helpers.streaming_bulk

有人可以建议如何使用函数elasticsearch.helpers.streaming_bulk代替elasticsearch.helpers.bulk将数据索引到elasticsearch中.

如果我只是简单地更改streaming_bulk而不是批量,则不会索引任何内容,因此我猜它需要以其他形式使用.

下面的代码从CSV文件中以500个元素的块创建索引,类型和索引数据,并进入elasticsearch.它工作正常,但是我在徘徊是否可以提高性能.这就是为什么我想尝试streaming_bulk函数的原因.

目前,我需要10分钟才能为200MB的CSV文档索引100万行.我使用两台机器,Centos 6.6,8个CPU,x86_64,CPU MHz：2499.902,内存：15.574G.
不确定它可以更快地进行.

es = elasticsearch.Elasticsearch([{'host': 'uxmachine-test', 'port': 9200}])
index_name = 'new_index'
type_name = 'new_type'
mapping = json.loads(open(config["index_mapping"]).read()) #read mapping from json file

es.indices.create(index_name)
es.indices.put_mapping(index=index_name, doc_type=type_name, body=mapping)

with open(file_to_index, 'rb') as csvfile:
    reader = csv.reader(csvfile)        #read documents for indexing from CSV file, more than million rows
    content = {"_index": index_name, "_type": type_name}
    batch_chunks = []
    iterator = 0

    for row in reader:
        var = transform_row_for_indexing(row,fields, index_name, type_name,id_name,id_increment)
        id_increment = id_increment + 1
        #var = transform_row_for_indexing(row,fields, index_name, type_name)
        batch_chunks.append(var)
        if iterator % 500 == 0:
            helpers.bulk(es,batch_chunks)
            del batch_chunks[:]
            print "ispucalo batch"
        iterator = iterator + 1
    # indexing of last batch_chunk
    if len(batch_chunks) != 0:
        helpers.bulk(es,batch_chunks)

解决方法:

因此,流式批量返回一个interator.这意味着除非您开始对其进行迭代,否则将不会发生任何事情. “批量”功能的代码如下所示：

success, failed = 0, 0

# list of errors to be collected is not stats_only
errors = []

for ok, item in streaming_bulk(client, actions, **kwargs):
    # go through request-reponse pairs and detect failures
    if not ok:
        if not stats_only:
            errors.append(item)
        failed += 1
    else:
        success += 1

return success, failed if stats_only else errors

因此,基本上只调用streaming_bulk(client,actions,** kwargs)实际上不会做任何事情.直到像本for循环中那样对它进行迭代,索引才真正开始发生.

因此,在您的代码中.欢迎您将“批量”更改为“ streaming_bulk”,但是您需要遍历流批量的结果才能真正索引任何内容.

标签：helpers,bulk,python,elasticsearch
来源： https://codeday.me/bug/20191010/1887925.html