dk readers

In the previous article, I wrote how to use gp_segment_id to determine whether the Dk value of the table has data. The following describes how to check the allocated unbalanced table by checking the amount of space occupied and re-adjust the Dk value. One of my greenplum machines, one of which has more data volumes than other nodes, shows the imbalance of data distribution, as shown in the following example

To test whether multi-Table association can be filtered by Image segment when multiple DK distribution keys exist, the test is as follows: [gpadmin @ gtlions50 ~] $ Psqlgtlionspsql (8.2.15) Typehelpforhelp. gtlions # createtablegtt1 (idint, namecharactervarying (5) distributedby (id, name); CREATETAB To test whether multi-Table association can be filtered by Image segment when multiple DK distribution keys

Thanks for kinglong's invitation not long ago. Now my Gmail has invited me. Today, I opened a Gmail surprise and found "invite a friend" in the lower left, 50 invitations. If you have any need, please reply to the DK invitation here: Http://www.sumso.com/dkblog/index.php? Action = show bid = 45 # feedback Note: Reply format: (your name) your current email (e.g. :( DK) w3cdk@yahoo.com) Note: I am only

Log Analysis of ETL background system data is currently underway. You can view the tasks that have been running for a long time, find the jobs that have consumed a long time, and optimize the logic and database layers. this article focuses only on Database optimization (including SQL statement adjustment and greenplum table DK adjustment ). view a job that takes about 30 minutes, find the corresponding source table, and perform the following analysis:

Who does a person's blog write for? Written for himself, or for the reader? Should blogs cater to their readers and write about what their readers like? This is probably a problem that puzzles many bloggers. Today I will discuss the problem in detail. 　　A spoiled reader. Blog early is another form of diary, with strong personalization, the reader is initially attracted by the author's personality, and subsc

you see a comments, you must respond positively. In this way, you can let your readers know that their comments are valued and create an atmosphere of communication and interaction, let them think that comments on your blog are very active and have received the attention of bloggers. However, this does not mean that each comment should be replied. For example, Lu songsong has a large number of blog comments. Many people only comment to increase ext

Opening a small meeting and grading a grand prize is not difficult. However, it is hard to choose winners from the free selection of a large number of readers. LinuxJournal has a large audience and is a group with high cultural taste. As the organizer of the selection Award for readers, LinuxJournal sets a certain number of "select projects" in advance based on the reader's proposal every year to provide

Original article: http://my.donews.com/htmlor/2006/08/21/why_no_comments/ In this article 10 reasons readers don't leave comments, which is displayed in the list of favorites in zeou, the author lists the reasons why 10 blog readers do not want to comment. I think it makes sense and I am very inspired by myself. So I recorded it as a memo. You have already written so carefully and comprehensively that, ap

CSS in a total of three types of sources: creators, readers and user agents, different sources will affect the style of cascading, many of the first time to learn CSS friends, the three kinds of sources may have some confusion, the following I write your understanding, if there is wrong place also please correct me.First of all, the creator (author's style) style should be familiar to us, and if you're a front-end developer, those styles you write are

English Original: Reasons Why Readers unsubscribe from Your Blog A lot of people are thinking about why their readers unsubscribe from their RSS feeds, which summarizes 34 reasons and tries to explain some of the reasons for user unsubscribe and motivation. 34 Users unsubscribe to the RSS feed reason: 1, the article updates too fast (frequent posting leads to user information overload) 2, the article update

Label: style blog http io color ar java**************************************** ******************************************************Original works, from the "Xiaofeng residual month xj" blog, welcome to reprint, reprint please be sure to indicate the source (http://blog.csdn.net/xiaofengcanyuexj ).For various reasons, there may be many shortcomings. Thank you!******************************************************* **************************************** **********In the process of m

One important purpose of blog writing is to share our experiences and feelings with readers. But where do the readers who visit their blogs every day come from? Local or foreign? Domestic or foreign? Now there is a plug-in that can help us figure out the location of the visitor. You just need to customize this service called clustrmaps (http://clustrmaps.com/getone.php! Clustrmaps is a thumbnail Of The Worl

A recent hot book. After reading some introductions, I am still quite interested in the categories and styles. Buy it. As a layman, I feel that this book is generally written. It takes more than half of the length to demonstrate that the return rate of capital since 200 is higher than the growth rate of the economy. It is too long for non-economic readers. The subsequent derivation and conclusions are not as shocking as expected. The subsequent expo

Readers/writers Lock Data structure:Readwrit's Initrwlock ()BOOL Initrwlock (RWLock *plock){Plock->nreadercount = 0;Plock->hdatalock = CreateSemaphore (null, 1, 1, NULL);if (Plock->hdatalock = = NULL)return FALSE;Plock->hmutex = CreateMutex (null, FALSE, NULL);if (Plock->hmutex = = NULL){CloseHandle (Plock->hdatalock);return FALSE;}return TRUE;}The next question is how to add the error handling function to produce a function called Mywaitforsingleobje

Similar to the producer and consumer issue in the second kill multi-thread Article 10 producer and consumer issue, reader writers are also a very famous synchronization issue. The reader writer's Problem description is very simple. One writer has many readers who can read files at the same time. However, when writing files, the writer does not allow readers to read files, some

Like the producer consumer Problem of the tenth producer consumer problem, the reader writer is also a very famous synchronization problem . The reader writes the question description very simple, has a writer many readers, several readers may simultaneously read the file, but the writer does not allow the reader to read the document when writes the document, also has the reader to read the document the wri

view of the system, rather than simply writing process-oriented code in the codebehind file: [16:52:00] HOST: optimize ASP. mr. Zhou Yong, one of the translators of "net-Object Oriented practice", was unable to attend the activity due to temporary issues, but still thanked Mr. Zhou Yong for his hard work in translating the book. [16:52:00] Liu junmin: How do I perform web optimization during Server Load balancer? During Server Load balancer, the most important issue to pay special attention to

After learning the next beautifulsoup, do a network crawler, crawling Readers magazine and Reportlab made into PDF. crawler.py Copy the Code code as follows: #!/usr/bin/env python #coding =utf-8 """ Author:anemone Filename:getmain.py Last modified:2015-02-19 16:47 E-mail:anemone@82flex.com """ Import Urllib2 From BS4 import BeautifulSoup Import re Import Sys Reload (SYS) Sys.setdefaultencoding (' Utf-8 ') def geteacharticle (URL): # response = Urllib

interest in checking in or out of work? Are you interested in borrowing money when you need a lot of cash at home? Is there any interest in paying for the money? The man who sells the rat medicine has no interest in the rat medicine ...? Why is it not interesting that Herbalife allows you to grow and improve, to improve your quality of life, and to allow your family to have a healthy and enjoyable day? 7, I did not consider--wrong: Consider doing it, it is possible to become! Do not do, not

Buffer"->: "10.4.3 Sort Buffer and Join Buffer" From ochefRecommendation sequence 2Original article: "Blog: http://www.orawh.com /"->: "Blog: http://www.ixdba.com /" P18Original article: "such as update, delte, insert, create"->: "Such as update, delete, insert, and create" Latest Update: 2009.10.19 From: Jasper CheP108Original article: "TL_WRITE_ALLOW_WRITE"->: "WRITE_ALLOW_WRITE"Original article: "P108 L7 concurrent Current read lock is the lock type of Read_NO_INSERT"->: "At the same time, C