, you need to set up your Linux or Unix operating system, such as Ubuntu or OS X.
Installation Pip,pip is a tool for installing and managing Python packets. You may have used Easy_install before, but the PIP has now replaced Easy_install. To install the PIP, go to the PIP index page of the Python Web site and follow the instructions.
After the PIP is installed, install IPython using the following command:
sudo pip install IPython
To install pandas using PIP:
sudo pip install pandas
There i
-runtime-status[mon Jul 16:52:23] [warn] No jkshmfile defined in Httpd.con F. Using Default/opt/apache-2.2.19/logs/jk-runtime-status[mon Jul 16:52:23] [notice] apache/2.2.19 (Unix) DAV/2 m od_jk/1.2.32 configured--resuming normal operations[[emailprotected] logs]# cat Mod_jk.log[mon Jul 25 16:52:23.55 5] [13355:3086857920] [warn] jk_map_validate_property::jk_map.c (411): the attribute ' Worker.node1.cachesize ' is Deprecated-please Check the documenta
/usr/local/java/jdk1.8.0_60/bin/javaslf4j:class path contains multiple slf4j bindings. Slf4j:found Binding in [jar:file:/usr/local/jstorm-2.2.1/wait_deploy/test-jstorm-bolt.jar!/org/slf4j/impl/ Staticloggerbinder.class]slf4j:found Binding in [jar:file:/usr/local/jstorm-2.2.1/lib/logback-classic-1.0.13.jar! /org/slf4j/impl/staticloggerbinder.class]slf4j:see Http://www.slf4j.org/codes.html#multiple_bindings for an Explanation. Slf4j:actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFa
401--Request Authorization failed
402--retains a valid Chargeto header response
403--Request not allowed
404--found no files, queries, or URLs
405--the method defined by the user in the Request-line field does not allow
406--requests for resources to be inaccessible based on accept drag sent by the user
407--is similar to 401, the user must first be authorized on the proxy server
The 408--client did not complete the request within the time specified by the user
409--the current resource state,
, depending on the accept sent by the user, and the user must first be authorized on the proxy server 408 Client does not complete within the time specified by the user409 for the current resource state, the request cannot be completed 410 no longer has this resource on the server and no further reference address 411 server rejects user defined content- The Length property requests 4,121 or more request header fields in the current request error 413 t
Recorded
Top
Column meaning
Vmstat
Procs
Memory
Swap
Io
System
Cpu
Uptime
Free
Iostat
Cpu
Device
Sar
Mpstat
Pmap
Netstat
Tcpdump
Strace
Lsof
Proc File system
Benchmark
Before Linux performance tuning, first need to understand the current service running state, find the program bottleneck, this need to use a series of Linux performance monitoring tools, the following common tools to do some summary.
Look at a map of the various tools, to understand the exact meaning of all the tools in this dia
Label:Indexes can be used to optimize queries, and in some specific types of queries, indexes are essential. Choosing the right index for a collection is the key to improving performance. First, mock data. for (i = 0; i ) {
Db.users.insert ({
"i": I,
"username": "user" + I,
"Age": Math.floor (Math.random () *),
new Date ()
});
1 million data will be created in the database, a little bit slower, and will need to wait. We can use the explain () func
Tags: utf8mb4 unknown characterCom.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:Unknown Character set: ' Utf8mb4 ' At Sun.reflect.NativeConstructorAccessorImpl.newInstance0 (Native Method) At Sun.reflect.NativeConstructorAccessorImpl.newInstance (nativeconstructoraccessorimpl.java:57) At Sun.reflect.DelegatingConstructorAccessorImpl.newInstance (delegatingconstructoraccessorimpl.java:45) At Java.lang.reflect.Constructor.newInstance (constructor.java:526) At Com.mysql.jdbc.Util.handleNew
Closure Compiler (used by jQuery) or YUI compressor. jQuery provides a pre-minified version of jQuery for your convenience. packing JavaScript using Dean Edwards 'Packer (specifically using the base64 encode) is not recommended, as the client-side decoding has significant overhead that outweighs the file-size benefits. jquery uses goog. Google Closure Compiler and YUI compressor are currently the best js compression methods. Dean Edwards 'packer is n
Google Group S, Google Suggest, and Google Maps-are Ajax applications. (For more on the technical nuts and bolts of these Ajax implementations, check out these excellent analyses of Gmail, Goog Le Suggest, and Google Maps.) Others is following suit:many of the features that people love in Flickr depend on Ajax, and Amazon's a9.com search Engi NE applies similar techniques.Google is investing heavily in Ajax technology, and several of the key products
relatively early version. The author seems to be the first master. Currently, it is version 3.0. It seems to be an online version. I compress the code on his website and cannot use it. An error may occur. (B) After jquery is changed to yuicompressor for compression, the specific version is not clear. The author of an article said: he found the file yuicompressor in jquery's svn, then he specifically used jQuery. js tried it and processed files and jQuery. min. js exactly. Original post address.
(Visual Studio 2003) through VC + + 10.0,In both debug and release modes. See Readme.windows forInstructions on the install on Windows using Visual Studio.Tcmalloc's related documents address: http://goog-perftools.sourceforge.net/doc/tcmalloc.htmlHttp://dirlt.com/tcmalloc.htmlAttention:Note that it is best to download the latest version of Gperftools to http://code.google.com/p/gperftools/instead of using the 2.1 version mentioned by the authors bel
The query results show that there are three hard disks, one is Seagate: ST3300657SS and the other is Hitachi: HUS156045VLS600. Use goog
The RAID information of the server can be viewed when the OS is started. you just want to use the command to view the RAID information. the content of the RAID information is as follows:
Software raid: can only be viewed in Linux
Cat/proc/mdstat
Hardware raid: The best solution is to use the installed raid vendor's m
Description:Enter a string and the maximum length of the symmetric substring in the string.
For example, if the input string is "google", output 4 is because the longest symmetric substring in the string is "goog.
Input:
Multiple groups of data exist. Each group of data contains a string of no more than 100 characters.
Output:
The maximum length of the output string.
Sample input:
Google
Sample output:
4
Algorithm analysis:I originally intended to u
calculation, we obviously need the stock price, so the priceFinder type is easily determined as Function. Therefore, we can declare the CalculateNAV constructor as follows:private Function
priceFinder;public CalculateNAV(final Function
aPriceFinder) { priceFinder = aPriceFinder;}
In fact, the above Code uses a design pattern called "Dependency Inversion Principle", and uses Dependency injection to associate types with specific implementations, instead
SQL method for changing the data type of a column when data exists bitsCN.com
First, remove (or DROP) the PK-FK relationship,
ALTER the column,
Then re-establish the relationship.All steps are implemented in SQL Enterprise Manager
Step 1: remove all links. Open the design table and then remove the table relationships.
Part 2: Change the column data type. I am working on the transition from varchar (2) to bit, and I feel like I should be able to change each other.
Part 3: restore all relati
Google Group S, Google Suggest, and Google Maps-are Ajax applications. (For more on the technical nuts and bolts of these Ajax implementations, check out these excellent analyses of Gmail, Goog Le Suggest, and Google Maps.) Others is following suit:many of the features that people love in Flickr depend on Ajax, and Amazon's a9.com search Engi NE applies similar techniques.Google is investing heavily in Ajax technology, and several of the key products
Approximate test instructions:A popular Science article, article 80% is useless information, because all is common sense, but also have to see, because 20% is ordinary people do not know the historical knowledge.Defined:Goog Month: Month of Monday for the first business dayLuckly Month: Month of Friday for the last working dayQ: Given a time-closed interval of the high Gregorian calendar in a Gregorian calendar (that is, the end of the month is included)"Start year, month" ~ "End year, month"How
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.