akamai outage

Solution:One. can be resolved by DOS command shutdownIn Win7, the shutdown implements the automatic shutdown method as follows:Start-to-run->cmdRun "shutdown-s-T 3600", where "3600" is the number of seconds off the shutdown, run "shutdown-a" to cancel the timer shutdown!or write a batch file: Shut down a minute before the reminder is about to shut down, you can modify the timing shutdown time.@echo offAt 22:50 every:m,t,w,th,f,s,su shutdown-s-T 60-c "It's late, it's time to sleep!" "At 13:50 eve

requirements, and the advantages of the algorithm is simple, access to the computational amount is relatively small (when the data is very large).However, it has a fatal disadvantage, that is, a server outage after the impact of a large, we can calculate the impact of a server outage: Most of the original data is lost: the number of servers reduced by one, take modulus minus 1 resulting in the mod

Source: Zhi Welcome to share the original to Bole headlinesa.PrefaceThe consistent hash (consistent Hashing), first proposed by MIT's Karger in 1997, is primarily used to address the service shocks caused by outages and expansions in volatile distributed web systems. Now the idea of the algorithm has been widely used, and in practice has been a great development.two.Algorithm Design1.source of the problemA service consisting of 6 servers, each server responsible for storing 1/6 of the data, and

peak is reached 6w ops/sec. Before we measured the maximum read and write throughput that a single RS can withstand on the line, it basically remained at around 2w, mainly because of network bandwidth bottlenecks. And this RS read and write throughput before the outage is so much, the intuition tells me that RS downtime is because of it!Then quickly pull out the log to see the full screen of the Responsetooslow, as shown:Obviously, the most likely ca

Http://www.haokoo.com/internet/2877400.htmlKafka in versions prior to 0.8, the high availablity mechanism was not provided, and once one or more broker outages, all partition on the outage were unable to continue serving. If the broker can never recover, or a disk fails, the data on it will be lost. One of Kafka's design goals is to provide data persistence, and for distributed systems, especially when the cluster scale rises to a certain extent, the

exposed to a hardware outage, unless you are using some special hardware, or require more stringent requirements, the most frequently modified hardware interrupts are interrupts (9H), especially text-editing programs. Generally speaking, Only the hardware designer base is a system programmer who notices all the hardware interrupts, and the designer who writes the memory-resident program uses only part of the hardware interrupts, especially the keyboa

1. Fault Check Information STOP 0x0000001E (0XC0000005,0XFDE38AF9,0X0000001,0X7E8B0EB4) KMODE_EXCEPTION_NOT_HANDLED * * * The first part of the error is the stop code (stop code), which is stopped 0x0000001E, to identify the type of error that has occurred, and the second part is a set of four numbers enclosed in parentheses. Represents a random developer-defined parameter (this parameter is not understandable to the average user, only the driver writer or Microsoft operating system developer

Chapter 1th IntroductionWith the widespread popularization of Internet application, the storage and access of massive data has become the bottleneck problem of system design. For a large-scale Internet application, billions of of PV per day is undoubtedly a very high load on the database. The stability and scalability of the system caused great problems. With data slicing to improve site performance, scaling out the data layer has become the preferred way for architects to develop . Horizontal s

Two times since the public survey of the full-service maintenance, have encountered an individual server outage time unusually long situation, specific performance for the shutdown process blocked in MySQL disk, to store data has not been reduced, continued about one hours to two hours after the continued storage, successfully stopped the service, and SQLError error "Lost Connection to MySQL server during query ".These two days colleagues query some i

. Horizontal segmentation of the database can reduce the load on a single machine, while minimizing the loss caused by downtime. The load balancing strategy can effectively reduce the access load of a single machine, reduce the possibility of the outage, and solve the problem that the single-point database cannot be accessed by the database outage through the cluster scheme, which maximizes the speed and co

performance on a mobile deviceBecause of the unpredictable nature of mobile devices, it is important to test performance on multiple devices. Here are some free performance testing tools: Mobitest,akamai: You can generate waterfall and har files for IOS 5.0,iphone 3 G and Nexus S on IPhone 4. Note The Nexus S test results are inconsistent with our own internal tests. Our server access logs show when we test the actual Android 2. The x devic

http post parameters to change the cache items. For example, you only need to set VaryByParam = "Report" to set the default. aspx? Report = 1 or default. aspx? Report = 2. You can specify other parameters by specifying a list separated by semicolons. Many people do not know when to use the output cache. The ASP. NET page will also generate some HTTP headers located below the cache Server, such as the headers used by Microsoft Internet Security and Acceleration Server or

attribute just mentioned. VaryByParams is requested, but you can also specify http get or http post parameters to change the cache items. For example, you only need to set VaryByParam = "Report" to set the default. aspx? Report = 1 or default. aspx? Report = 2. You can specify other parameters by specifying a list separated by semicolons.Many people do not know when to use the output cache. The ASP. NET page will also generate some HTTP headers located below the cache Server, such as the header

) http://blog.erratasec.com/2014/09/bash-shellshock-bug-is-wormable.html#.VD5bymSUeE1 (29) http://resources.infosecinstitute.com/bash-bug-cve-2014-6271-critical-vulnerability-scaring-internet/ Http://unix.stackexchange.com/questions/157329/what-does-env-x-command-bash-do-and-why-is-it-insecure 31) http://askubuntu.com/questions/529511/explanation-of-the-command-to-check-shellshock 32) http://digg.com/video/the-shellshock-bug-explained-in-about-four-minutes Http://www.symantec.com/connect/bl

technologies, and fiber-to-household. Akamai publishes a global bandwidth report every quarter With the Tracerouter tool, you can view the routing topology, and the last kilometer delay has a significant relationship with the provider, deployment method, network topology, and even the time of day. As an end user, if you want to improve your internet speed, it is critical that you choose the shortest latency ISP. ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

cache", the gateway cache is also acting as a proxy role, through the network administrator (or webmaster himself), can make the bandwidth more efficient use, so that their website becomes more reliable.Content Delivery Networks(CDNs) to sell their cache service. Speedera and Akamai are very famous CDNs.What is the impact of caching on your site? How do I use caching correctly?Site cache is often misunderstood, owners think proxy cache can be "hidden

answer is "Facebook content distribution Network". Facebook uses content distribution networks (CDNs) to distribute static files like images, CSS tables, and JavaScript files. As a result, these files will be backed up in many CDN data centers around the world.Static content often represents the bandwidth size of the site and can be easily replicated through a CDN. A third-party CDN is usually used by the website. For example, Facebook's static files are hosted by

Facebook is now reading more than 10 times times faster than standard mobile web articles. Yes, it's 0.8 seconds, honestly, no one knows how Facebook did it, and it's really impressive.Facebook has full control over what is presented to the user. Without instant articles, users clicked an article on the New York Times web site, most likely to come to the New York Times Web server (which might be provided by Akamai or other similar vendors), and then

content often represents the bandwidth of the site and can be easily copied through CDN. Websites usually use third-party CDN. For example, Facebook's static files are hosted by Akamai, the largest CDN provider. For example, when you try to ping static.ak.fbcdn.net, you may obtain a response from an akamai.net server. Interestingly, when you ping the server again, the response server may be different. This shows that the load balancing function start

download page, such as files, stylesheets, scripts, and Flash. Instead of the difficult task of refactoring the system, it is better to distribute the static content first. This not only greatly reduces the response time, but also due to the existence of CDN, the distribution of static content is very easy to implement. A CDN is a collection of geographically distributed Web servers that you use to publish content more efficiently. Web server is typically selected for specific user services bas