when full or large files are read, the memBuffer data in the call is sorted, and the ordered results are written to the disk file bigdata.xxx.part.sorted .Recycle memBuffer until a large file is processed, and get N ordered disk files:2. HopewellNow that you have n ordered small files, how do you merge them into 1 large, ordered files?Read all the small files into memory, and then inside the row?(⊙o⊙) ...No!Use the following principles for merge sorting:Let's give a simple example:
Fil
you. the Two optimization schemes are both good.
I have created a composite index for typeid, appid, and ip. in this way, this statement goes through index query and does not return to the table. the time limit is less than 1.5s, which is effective.
As for the HyperLogLog algorithm, I just checked it and did not use it in practice. thank you for your suggestion.
Another method I used was to process the 500 million + data in batches by planning tasks.
I installed Magento2 on UBUNTU14, Web Access http://localhost/can show the Apache hint it work! , but http://localhost/magento2/tip http ERROR 500
I installed it by using the following command:
Apt-get updateapt-get install git wgetwget-o/usr/local/bin/composer http://getcomposer.org/composer.pharchmod +x/usr /local/bin/composercd/var/wwwgit Clone Https://github.com/magento/magento2.gitcd/var/www/magento2composer Install
After the error, I checked th
git address Http://git.oschina.net/nixi8/yiibasc
Because the page is a blank, and then the breakpoint can be normal output, not very good troubleshooting, so ask
Reply content:
git address Http://git.oschina.net/nixi8/yiibasc
Because the page is a blank, and then the breakpoint can be normal output, not very good troubleshooting, so ask
Upstairs the answer is the positive solution, vendor files under the default is not being tracked by Git, see. Gitignore There is write, you put the. Giti
Pageencoding = "gb18030" errorpage = "errorpage. jsp" %>Int I = 5/0;%>
There is an error in this page, and the error page has been directed to handle_errors.jsp, And that page is correct.
However, each time you open this page for the first time, an HTTP 500-internal server error is displayed, rather than a jump to the error page to handle it. It's strange, but you can make some modifications to this page, then you can jump to the page.
I fo
time, you open the control panel-> Add/delete Windows Components, you will find that the Internet Information Service (IIS) installation options have appeared in the installation list.After that, it will be the same as installing IIS normally, except that files cannot be found during installation (this is normal, because your IIS installation directory is not in the XP default directory ). In this case, you can click browse and select the directory you just decompressed. This allows you to sele
First:There may be the following three cases, because these components may be damaged. Input them in the running and try them one by one.
Regsvr32 % WINDIR %/system32/jscript. dll
Regsvr32 % WINDIR %/system32/VBScript. dll
C: \ windows \ Microsoft. NET \ framework \ v1.1.4322 \ aspnet_regiis.exe-I
There are currently three DOTNET versions. You can change one of them to another.
V1.1.4322
V1.0.3705
V2.0.50727
Second:
I found an e-文. You can translate it for me ^_^.
Http://search.inter
First, determine the cause of the error:
Let ie display detailed error information:Menu -- tool -- Internet option -- Advanced -- display friendly HTTP Error information. Remove this option and refresh the error page to view detailed error information, it is very helpful to help you determine the error!
Common Causes of 500 errors include ASP syntax errors, access database connection statements errors, file references and inclusion paths errors, a
Back up the database, that is, with Empirebak, you can php5.1.6 the normal imperial backup king but upgrade php5.3.6 after the 500 error.
Baidu began again, the results are not found, it seems that Baidu can not go to the Imperial Official forum to ask questions.
Question 1:30 will not answer the Google search php5.4.6 problem, has not been resolved
Later the Empire Forum was answered, the problem solved is very simple, modify php.ini, set Short_op
/qq1355541448/article/details/21375407.
I follow the address of this blog set, that is to say, httpd.conf inside to separate settings, such as a website
LoadModule rewrite_module modules/mod_rewrite.so//I wrote it here, ServerAdmin webmaster@dt.e.com documentroot/web /xx.com ServerName xx.com errorlog logs/errun-error_log customlog logs/acrun-access_log Common
A single web site will need to open a separate module, can not be configured globally, I fo
First, status code 500 is a non-known type server error. What we found today is a page verification error when a page is dynamically loaded because HTML elements are dynamically written to the page, the page verification fails due to the nonstandard HTML elements, so the request is interrupted.
The next step is the solution. Our predecessors have already provided a lot of ideas. Let's talk about these methods:1. Add the validaterequest = "false" att
In Visual Studio.. NET 2003 to create or open an ASP. when creating a web project or opening a web project at URL "http: // localhost/webapp1", the web server reports the following error. "HTTP/1.0 500 server error ". if you encounter this problem, the solution is as follows:
(1) check whether a proxy is mounted in your browser. If a proxy is mounted, vs. NET may not recognize localhost. Therefore, this error may occur. Remove the proxy and try again
atitit.php nginx page blank and return to the resolution1 . 1. Blank question Origin 11 . 2. php.ini Open display_err 11 . 3. Modify www.conf and restart . Restart PHP-FPM 11.1.Blank question OriginNormal php ok . Error PHP does not display the problem: Local Apache can display errors. Should be the server's nginx problem configuration: In the process of using Nginx will always encounter the nginx tip of the error, but the specific error where out of the need to run to the backstage to see
The premise of this problem is that I changed the password of the server, the results of the published Web site is reported500 Internal server Error!!!!!!!!!!!!After a toss-up, the final reason is the identity authentication in the basic settings of the specific website on IIS:(1) Log on to the server IIS, click "Tools", select "Internet Information Services (IIS) Manager"(2) from the left side of the site management to find their own site click, and then from the right side of the screen check
When IIS7.5 opens the Web page, Tip: HTTP error 500.0-internal Server error call LoadLibraryEx failed in ISAPI filter C:\Windows\Microsoft.NET\Framewor K\v4.0.30319\\aspnet_filter.dll, after the exclusion of the original two slash leadWhen you open a webpage in IIS7.5, you are prompted:HTTP Error 500.0-internal Server errorThe call to LoadLibraryEx failed, on the ISAPI filter "C:\Windows\Microsoft.NET\Framework\v4.0.30319\\aspnet_filter.dll",Some say the Enable 32 bit in the application pool is
Use only 500 lines of Python code to implement an English parser tutorial,
The syntax analyzer describes the syntax structure of a sentence to help other applications to reason. Natural Language introduces many unexpected ambiguities, which can be quickly discovered by our understanding of the world. Here is an example that I like very much:
The correct resolution is to connect "with" and "pizza", and the wrong Resolution Associates "with" and "eat:
-Management Module-windows Component-internet Control Panel-Security page-internet area, find "login Options" on the right,Double-click, the setting is started, select Automatically select the current user name and password.I have two internet areas, it is sad, two have changed, after the change, you need to restart the browser, or in the site management to re-browse,My browsing always error, do not know what to ask, but do not affect the site will not care about ....This is the time to see the
SPRING+STRUTS2 integration, do a user login test program, with the configuration file fragmentHowever, the following 500 errors are reported after submitting the form, if the direct write class= "com.system.actionLoginAction" can be executedUnable to instantiate Action, loginaction, defined for ' login ' namespace '/' LoginactionCom.opensymphony.xwork2.DefaultActionInvocation.createAction (defaultactioninvocation.java:306)Com.opensymphony.xwork2.Defau
Error 500 reported after the first integration of struts2 + spring form submissionSpring + struts2 integration, a user login test program, with a configuration file segment
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