Objective-C basics: Basic knowledge of Object-Oriented Programming (OOP) (1) -- indirect, objective-coop
Since Cocoa is based on the concept of OOP and Objective-C is also an object-oriented programming language, it is necessary to frequently discuss the concept of OOP when learning Objective-C.
0x01 what is indirect?
Indirection is a key concept of OOP. It can be understood as "indirectly obtaining a value through a pointer in code, rather than dire
F5 session persistence, f5 session
In recent projects, F5 needs to be used for load balancing and relevant information should be recorded.
The following is a description of the relevant parameters in the F5 change application. Let's take a look at them. Let's pick several important parameters to learn.
Enter in the URL address bar: Such a refresh, you can see in the Firebug, only a few requests will be sent out, and almost no picture of the request, this is because the request will first check whether the local cache of the requested picture, If there is a cache and there is no expiration (the expiration can be viewed through the header of the picture request), he will not issue the picture requests.F5:f5 refresh is slightly slower than enter, for w
like you find a box of milk that has expired, so ask others, can not drink, if others say yes, you drink it, if others say no, then you have to find another box of fresh milk.As for F5 Refresh, its HTTP request message header is as follows:Host 192.168.3.174:8080User-agent mozilla/5.0 (Windows NT 5.1; rv:5.0) gecko/20100101 firefox/5.0Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8Accept-language zh-cn,zh;q=0.5Accept-encoding g
Pressing CTRL + F5 in Internet Explorer is a convenient way to force the page to be reloaded. All components of the page (images, CSS, JavaScript, and so on) are forcibly reloaded. it is equivalent to using an empty cache IE to access a page.
F5 is a simple refresh of the current page, click Ctrl + R, or right-click to refresh, it is the same, they have"If-modified"String. If you view
, the system returns 304 not modified. After the browser receives the modification, it reads the content from the cache. If it is modified, the system returns 200.OK, and new content is returned. In this situation, you find a box of expired milk, and ask someone else if they can drink it. If someone else says yes, you will drink it. If someone else says no, then you haveFind a box of fresh milk.
For F5 refresh, the HTTP request message header is as
F5 (debugging) and server controls, f5 debugging server controls
I. debugging
Background:
When debugging today, I found that the website I entered is http: // ×××. com: 7813/webaspx/System/Login. aspx (because the code is in the company, I don't have it. After waiting for half a day, the page cannot be loaded ). I have encountered a problem similar to this kind of problem since I just entered a new company
milk. As for F5 Refresh, its HTTP request message header is as follows: host 192.168.3.174:8080 user-agent Mozilla /5.0 (Windows NT 5.1; rv:5.0) gecko/20100101 firefox/5.0 accept text/html,application/xhtml+xml, application/xml;q=0.9,*/*;q=0.8 accept-language zh-cn,zh;q=0.5 Accept-Encoding gzip, deflate accept-charset gb2312,utf-8;q=0.7,*;q=0.7 connection keep-alive if-modified-since Mon, 10:12:40 GMT cache-control Max-age=0 Another l
like you find a box of milk that has expired, so ask others, can not drink, if others say yes, you drink it, if others say no, then you have to find another box of fresh milk.As for F5 Refresh, its HTTP request message header is as follows:Host 192.168.3.174:8080User-agent mozilla/5.0 (Windows NT 5.1; rv:5.0) gecko/20100101 firefox/5.0Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8Accept-language zh-cn,zh;q=0.5Accept-encoding g
F5 BIG-IP Server Load balancer configuration instance and Web Management Interface experience [original] Big | medium | small [| by banquet] [Author: Zhang banquet this article version: V1.0 last modified: for more information, see http://blog.s135.com/f5_big_ip].
Recently, the performance of F5 BIG-IP and Citrix NetScaler Load balancer has been compared and tested, so I wrote this article to record the co
[Article Zhang Feast this article version: v1.0 last modified: 2008.05.22 reproduced Please specify from: HTTP://BLOG.S135.COM/F5_BIG_IP]In the recent comparison of testing the performance of F5 big-IP and Citrix NetScaler load balancers, write this article to document the common application configuration methods for F5 big-IP.Currently, many vendors have launched a load balancer dedicated to balancing serv
Reprint: http://www.zyan.cc/f5_big_ip/In the recent comparison of testing the performance of F5 big-IP and Citrix NetScaler load balancers, write this article to document the common application configuration methods for F5 big-IP.Currently, many vendors have launched a load balancer dedicated to balancing server load, such as NetScaler of F5 Network's Big-ip,citr
Description of several format files:Csr--> the files generated on the F5. Contains the domain name, company name, department name, city, mailbox and other information.Crt/cer--> public key, certificate file, issued by an authoritative certificate authority.Key--> the private key, which is generated in pairs with the CSR.Cases:1_root_bundle.crt--> certificate chain (tree structure containing the certificate, traced to root certificate authority)2_test_
F5 session persistence
In recent projects, F5 needs to be used for load balancing and relevant information should be recorded.
The following is a description of the relevant parameters in the F5 change application. Let's take a look at them. Let's pick several important parameters to learn.
Actual server address
=======================================
F5 Full Name: F5-BIG-IP-GTM Global traffic manager.
is a company called F5 Networks development of the four-seven-layer switch, hardware and software bundles.
It is said to have originally used BSD systems, which are now Linux; hardware is Intel's PC architecture, plus the surrounding network and dedicated acceleration d
In Seattle, November 6, F5 Networks Inc., a global application Delivery Network provider, announced that its ARNApplication Delivery Network for Microsoft was further extended to support Microsoft Office Communications Server 2007. F5 application ready Network (ARN) will bring high availability, scalability and excellent performance to the Unified Communication Environment of all Microsoft customers.
Zeus K
Based on the huge network structure, the use of Cluster Server brings a lot of load problems such as traffic. So the relative, load-balanced technology also emerged. Each technology requires product support, so let's now look at one of the F5 load balancers. So first of all, we first introduce the structure of the product function.Many vendors have launched a load balancer dedicated to balancing server load, such as NetScaler of
F5 Virtual Machine (ltm virtual edition) Installation tutorial
From: http://www.cisspro.info /? P = 109
Iii. 14,201 1 in
F5
F5 Virtual Machine (ltm virtual edition) Installation tutorial
1.RegisterAsk.f5.comAccount
First, you need to download F5 ltm ve 10.1 and apply for license.
If you do not have an account for ask.
F5 forwarding Mode1. Transparent mode: Performance L4This type of virtual server. F5 processes packets in a pure four-tier manner, looking only at source IP, source port, destination IP, and destination port. After the packet arrives F5, only the destination IP and port are changed to forward. This part of the data processing method can be transmitted through the
Based on the huge network structure, the use of cluster servers brings a lot of traffic and other load problems. In contrast, Server Load balancer technology has also emerged. Every technology requires Product Support. Now let's get to know one of F5 Server Load balancer. First, we will introduce the structure and functions of the product.
Many vendors have launched load balancers dedicated to balancing server loads, such as
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