首页 \ 问答 \ 在hadoop中,我只想在每个节点上执行自己的自定义程序(In hadoop, I just want to execute my own custom program on each node)

在hadoop中,我只想在每个节点上执行自己的自定义程序(In hadoop, I just want to execute my own custom program on each node)

是的,我想在每个hadoop节点上运行我的自定义程序。 我想部署No mapper和reducer。 它就像分布式计算系统不像mapreduce(但在内部使用hdfs)。 我应该怎么做?


Yes, I want to run my custom program on each hadoop node. I want to deploy No mapper and reducer. It is just like distributed computing system that doesn't works like mapreduce(but which uses hdfs internally). How should I do?


原文:https://stackoverflow.com/questions/39460414
更新时间:2024-02-07 11:02

最满意答案

您应该发布一些关于您尝试过的内容。 也许给我们一些示例代码和您遇到的问题。 话虽如此,请参阅下文。 在没有看到您的解决方案细节的情况下,有很多不同的方法。

SQL FIDDLE

SET DATEFIRST 2;

DECLARE @SalesData TABLE    (ID INT PRIMARY KEY IDENTITY(1,1), SalesDate DATETIME, Price MONEY)
INSERT INTO @SalesData (SalesDate,Price) VALUES
    ('1/1/2013',12.00),
    ('1/2/2013',14.00),
    ('1/3/2013',11.28),
    ('5/3/2013',11.64),
    ('5/3/2013',18.00)

;WITH
SalesInfo AS
(
    SELECT  sd.id,
          YEAR(sd.SalesDate) AS TheYear,
          DATEPART(week,sd.SalesDate) AS TheWeek
    FROM      @SalesData sd
)
SELECT  SI.TheYear,
       SI.TheWeek,
       SUM(SD.Price) AS TotalForWeek
FROM       @SalesData AS SD
       INNER JOIN SalesInfo AS SI ON (SD.ID = SI.ID)
GROUP BY      SI.TheYear,SI.TheWeek


SET DATEFIRST 7

DATEFIRST MSDN


You should post a bit more about what you've tried. Maybe give us some sample code and problems you are having. That being said please see below. Without seeing your solutions specifics there's a lot of different approaches to this.

SQL FIDDLE

SET DATEFIRST 2;

DECLARE @SalesData TABLE    (ID INT PRIMARY KEY IDENTITY(1,1), SalesDate DATETIME, Price MONEY)
INSERT INTO @SalesData (SalesDate,Price) VALUES
    ('1/1/2013',12.00),
    ('1/2/2013',14.00),
    ('1/3/2013',11.28),
    ('5/3/2013',11.64),
    ('5/3/2013',18.00)

;WITH
SalesInfo AS
(
    SELECT  sd.id,
          YEAR(sd.SalesDate) AS TheYear,
          DATEPART(week,sd.SalesDate) AS TheWeek
    FROM      @SalesData sd
)
SELECT  SI.TheYear,
       SI.TheWeek,
       SUM(SD.Price) AS TotalForWeek
FROM       @SalesData AS SD
       INNER JOIN SalesInfo AS SI ON (SD.ID = SI.ID)
GROUP BY      SI.TheYear,SI.TheWeek


SET DATEFIRST 7

DATEFIRST MSDN

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