How to pick a host

Absrtact: I have written an article on the selection of host very early, may also be a series of articles it is probably not a good idea, because since I am a host business, it is inevitable that the wangs sell melons suspicion. But I'm also a mainframe client.

I have written an article about choosing a host very early, or it may be a series of articles--it is probably not a good idea, because since I am a host business, it is inevitable that the wangs sell melons suspicion. But I'm also a mainframe client--relative to my upstream, so this article or this series of articles not only on the end of the consumer (those willing to pay only 100 yuan or less customers), but also to some people who want to work in the IDC industry (from a certain customer accumulation of veteran to novice rookie) has a certain degree of readability.

First of all, this is an article I sent last year, most of which is still true today, but more importantly, it has a lot to add and correct.

1 Anti-check IP can know how many sites on a server?

This method may be useful for domestic hosts that are scarce in IP resources, but it is of no reference significance to the IP-rich US hosts. Because the server, IP address and the site is not a one-to-one relationship, a server can have dozens of IP addresses, a Web site may have several IP addresses, so through the IP address reverse query the same IP on other sites, and can not explain the server load. In addition, IP retrieval is often difficult to achieve accurate and comprehensive.

2 US hosts provide unlimited unlimited resources?

The United States host is the first to be praised is relative to the domestic host unusual "generous" resource allocation scheme, BH,HM,HG,LP,DH this several street know the United States hosts almost all provide unlimited space, unlimited traffic, unlimited database, unlimited number of websites ... Is there really no limit? Of course not, space, flow, database, bound domain names are only surface parameters, what is behind the surface? CPU usage limits, memory usage limits, maximum allowable memory limits for programs, maximum number of database connections at the same time ... These are usually written in the TOS User Agreement of the host, and are hidden in the humble place of their website. In the case of hostn*** TOS, its server limits is very typical:

* Mainly CPU and or memory for 3 minutes.3 minutes with up to 25% CPU or memory resources

* Combined Gros CPU & RAM over hours.24 hours with up to 5% CPU or memory resources

* Hour email limit per domain each. 250 email restrictions each hour

* Concurrent Database 50x15 at one time. Up to 50 database connections

* Apache threads to be open no longer then 999 seconds. Apache threads longest running time of not more than 999 seconds

* PHP upload limit of megs. PHP Upload limit 15MB

* Max PHP session times of seconds or less.php session maximum uptime not exceeding 300 seconds

Barrel principle as we all know, the amount of water in a bucket does not depend on the tallest piece of wood on the barrel wall, but on the shortest block on the wall. Space, flow is like a tall block of wood on a barrel wall, and the obscure use restrictions written in TOS are like a lower block of wood on a barrel wall. If you only see a higher block of wood, think you buy a bucket really can hold so much water, that is plain.

3 Oversell is overload?

People who know the American mainframe barrel principle usually know what is called Oversell (Super Sale). Do the United States mainframe reseller friends more clearly. To Oversell policy as the standard, the general United States mainframe resale scheme (agent) can be divided into three kinds, the first is oversellenabled (allow agent over sale), such as sha*******; the second is to add money to allow Oversell, such as geeks****** The third is Zerooversell enforced (not allowed to be sold), such as ihu****. The hosts of the previous two schemes have sold their own shared webhosting to the end-users, and are certainly also Oversell; the third program of the host if it does not exceed the sale, then the price is very high, to catch the VPS.

Some experienced friends think that buy no oversell of the United States mainframe, his "barrel" can be more water, in fact, is still in the U.S. host business smoke bomb. For whether Oversell or Nooversell, talking about higher blocks on the barrel wall, their highs or lows, is not a determining factor for how much water a cask can hold. Suppose that your site is on the server there is a other user of WordPress, IP3000,PV1 million, even if his site only used 50M space, host to disk space and traffic is not over sales, but also enough for you to drink a pot of the.

Oversell does not represent overload, a reasonable server limits can keep the server stable at a lower load, guaranteeing the interests of most users.

4 Space Merchant's website quick to explain its host fast?

A lot of people visit the website of the space merchant, judge the advantage of the space by the first impression, however the website of the space Merchant does not explain its host quickly. California, which is closer to China's physical distance, has many big hosts, but most of them, servers are located in the middle of the United States, such as Texas Data Center, but also some host's web site on the West Coast, but the host sold to the user is located in the Middle East of the United States, although their access to the site is very fast, But its products are not suitable for Chinese users.

Some host chambers in their web site to provide test IP, through the tracert IP address, experienced friends can determine the host server is hosted in which data center (engine room), host website receptacle and the data center page can also provide some valuable information.

Further in-depth analysis

1 speed, or speed.

I always think that the first factor to consider when buying a host is speed. Specific to the speed of the United States mainframe, as the previous common misconception 4th mentioned, to see the host of the server in the end is the data Center (room).

The internet communication between China and the United States is connected by the submarine optical fiber, the Chinese ashore is Qingdao, Shanghai Chongming Island and Hong Kong, the United States is Los Angeles, Oregon State Cannes beach. The distance between China and America is half the earth, light 300,000 kilometers a second, around the earth 7.5 laps, 1 seconds =1000 milliseconds, then around the earth half the speed is 1000/15=66 millisecond, data return need the same time. Ping a server in the United States, the data request the past, and then back, the time required is what we often say ping value. Data only from the bottom of the submarine cable to the head, it is already required 133ms response and transmission time. So a host with a ping value of less than 133MS cannot be located in the United States (some of the Hong Kong IDC's IP address query results show that the United States, but actually in Hong Kong, has no speed advantage in Hong Kong hosts on a global scale).

Shanghai Telecom to Chongming Island, China and the U.S. seabed fiber starting point ping value of about 10ms, to Los Angeles, part of the data center of the ping value is less than 160ms, minus the submarine 133ms transmission time, that is, after landing in Los Angeles to the United States data Center ping value is only 17ms. However, in addition to the ping on the bottom of the sea is determined, the Chinese mainland broadband users to Qingdao/Shanghai/Hong Kong, China-US submarine optical fiber starting point, the end of the Sino-US submarine fiber terminal to the United States a data center of the time loss is uncertain, the former is we can not change, 250MS is the maximum acceptable ping value, the data from the submarine optical fiber U.S. landing point to the United States data Center (engine room) can accept the longest response and delivery time is 37ms.

37ms, does such a data center exist? From the physical distance, the United States West coast of the well-known data center can basically meet the requirements, the Midwestern United States, such as Dallas part of the data center through optical fiber directly to the West Coast network node can also be satisfied, the east even if there are optical fiber direct connection is difficult under 37ms.

Several data centers are listed below:

* WEBNX Los Angeles EADS, as the U.S.-China submarine optical fiber of the United States ashore, Los Angeles has a direct domestic speed advantage, Los Angeles EADS Data Center Fast, the drawback is that netcom user switch rate is higher. WEBNX provides server hosting for the data center, as well as servers in the data center of the United States hosts, large such as inn********, but the restrictions on the use of resources more stringent, small, such as pow*********, has been adopted by the domestic Reselller, The disadvantage is that small scale has a certain risk.

He is a fast-known Silicon Valley data center in the United States, where Silicon Valley is the main provider of bandwidth access, and he and his largest egihosting provide server hosting, but none of the reseller programs.

* Peer1 California Fremont Data Center, Peer1 is also known as a data center, the use of Peer1 host has resellerp****, the domestic homezz previously used is this reseller program, and then the host business stability problems , the speed aside, the choice of technical strength to ensure that the host business is also very important.

* SoftLayer Seattle, also located on the West coast of the United States, the speed of the connection is also ideal, the speed and stability of the SoftLayer data center is good.

* Colo4dallas Dallas engine room, Dallas although close to the central United States, but the speed of the Colo4dallas data center is relatively ideal, the server is located in the data center to provide the reseller program host has cru*****.

* SoftLayer Dallas, SoftLayer is connected to the Dallas's data center through fiber optics and the Seattle Engine room, which is close to Colo4dallas in speed.

* ...... If someone is willing to share more excellent data centers, please add.

2 Stability First

One big advantage of the US mainframe is stability. In particular, the use of distributed storage/cloud computing host (such as nea*************, lau**********) stability is desperate. Technically speaking, the United States mainframe leading the country a big cut. I have used Beijing BGP (formerly Cph/lampdrive Host rental), Shanghai Telecom and Mobile, Beijing, the host of the soil, from the stability of the United States mainframe has a big gap. Generally speaking, the U.S. hosts with good reputation on wht are very stable.

3 where is the price/performance ratio?

The question of price/performance is difficult to understand. But there are a few basic facts I believe we can all agree. First of all, more than 300 U.S. virtual host is difficult to market, the virtual host is independent blog and small webmaster, the domestic 300 yuan can be purchased from the agent to the million network M3 type of virtual host, the price of the United States virtual host is very lethal. I think that the direct purchase of the United States hosts the shared webhosting virtual host is the most cost-effective, if the general virtual host 50 dollars a year, the equivalent of RMB350 yuan, this price you can consider a lot of good domestic host business.

Here we have to go back to the cask theory. As an example, sca*********, the server is located in the SoftLayer data center, its host price scheme and resource constraints are as follows:

Shared Hosting

Cpu/memory resource limits CPU and memory limits:

* Plan mini-1% a year $35.4,￥241

* Plan start-2% a year $47.4￥322

* Plan advanced-4% a year $95.4￥649

* Plan e-commerce-6% a year $155.4￥1057

Reseller Hosting a year $239.4￥1628

Any account on the server cant usage more than 4% CPUs or memory resources. Reseller (agent) resale of each account can use no more than 4% of the CPU and memory.

Typically, the mainframe chambers give reseller accounts more resources, such as 4% CPU usage. According to the cask theory, the amount of water in a bucket does not depend on the tallest plank on the barrel wall (the size of the space, the amount of traffic), but on the shortest piece of the barrel wall (CPU and memory limits). Suppose the reseller to ￥ 90 yuan to sell domestic users, according to the principle of cask, the user actually at 90 yuan to buy directly from sca********* purchase plan advancedshared host (need 649 yuan) as much resources (4% CPU and memory resources). So if reseller is trustworthy and buys an American host from him, you're definitely making it.

Conclusions and recommendations

1 The least worth to buy is unlimited shared web hosting, resource short board obvious, the price has no advantage, far inferior to spend <100 yuan to find domestic trustworthy U.S. host reseller/spend <300 yuan in the domestic buy a reliable host.

2 If your site Pv1, do not expect to shared web hosting, you have three solutions: do not understand the technology of Purchase reseller account/Technology Purchase VPS Independent server hosting.

Article Source: http://blog.frompku.com/