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Choosing web hosting

May 31st, 2009

Choosing web hosting

To have a hosting quality is essential for the smooth running of the website.

The main points to remember when hosting a recruit wants are:

1. Diskspace
2. Transfer
3. Multidomain
4. E-mail accounts
5. Available Resources

1. Diskspace:

Disk space is the “piece” of hard disk you have available for upload. There are many hosting companies that this value is included in the space occupied by the log files (which are the entrances to the site) and mail.

Sometimes it falls into the error of considering the space of the most important features of a hosting, but it is not so, because we must take into account many more factors, such as the transfer. What helps us to have a great site if we realize that we are not going to be able to serve information to users because we do not have a transfer capacity sufficient?
2. Transfer:

The transfer is the amount of traffic you can handle your site. It is one of the most important factors in hiring a hosting. We must calculate very well what the current requirements of our website and what needs to be given a few months.

To make a calculation of the capacity that we may need your site using the following formula:

Num pageviews / month  Average size page = transfer / month

Using this simple formula, we can make an estimate of the monthly transfer that has the site, and therefore adjust the recruitment of women to real needs. I recommend you always take into account the outcome of the high, ie, worth more than the transfer capacity of not missing, therefore, be generous.

Normally leave hostings expand capacity smoothly, however, prices tend to be quite abusive, so I make a good initial estimate and leave a good margin for the site can grow without having to preocuparos of the transfer.
3. Multidomain:

When we speak of a multidomain hosting, we mean that we can accommodate more than one domain with the same plan contract, which saves us hiring a new plan for each of the sites you want to mount. .

Plans “reseller” (multidomain) are very useful, since it gives a great flexibility in mounting another website, and usually come out much more advantageous to hire a different plan for each of the sites.
4. E-mail accounts:

This is another very important feature to consider. If you ride a site for a company with multiple clients, you’ll be asked to have several email accounts at your disposal, and therefore you should have hosting that you included in the plan contrateis.

Usually the most basic plans and therefore lower cost, put a few mail accounts available to customers, so we can find that is a critical factor given the requirements of a site.
5. Resources available:

In this section we will include the resources that are most often sued a hosting.

PHP: To implement a dynamic web page must use one of the languages available on the market, these include PHP, ASP and JSP and others.
ASP is a software license, which is hosting at a cost of course and will reflect the users who take the plan, so it is difficult to find hostings “cheap” we offer this language. JSP not licensed, but the architecture that is associated with it (to run sites implemented using JSP) is quite complicated to keep shared servers, therefore it will not be available for most hostings. Finally, PHP is a language without a license (not entail any cost to the hosting), as well as being supported by an architecture easy to maintain (usually Apache, also open source), for these reasons and because of strong demand is having at the moment, is the language that we will provide most of the hostings.
MySQL: MySQL is a database manager SQL, open source and therefore free. Year over year gains in strength and stability, which has led it to be one of the management systems used in the world. In the market we can find other systems such as Oracle or Postgres, but the use of Oracle is subject to license and therefore is not usually found on most hostings. Postgres is starting to get enough strength, which will soon begin to see it in most plans.

Broadly, these are the properties that we must take greater account when hosting a recruit. Above all, I would advise doing a thorough analysis of the requirements of the website so that when making the decision has as much information as possible.

shared web hosting and CPU quotas

May 31st, 2009

shared web hosting and CPU quotas

It is known that overloading of the servers are actually sharing a very serious problem, this type of problem causes discomfort in several hundreds of websites, which usually belong to tens or hundreds of different clients. MENARES This causes discomfort to a large number of customers at once.

Avoid overloading?
Stress server hosting and shared web hosting as well as dedicated servers are caused by multiple causes, but among the most common are:

1. On use of the email, often associated with the sending of spam:

Preventing a user to send more than X amount of emails per day, or at least the number of Anti-mails sent each.

2. On use of the Web, usually one or more sites that receives several thousand hits a day on average:

Systematic review of all apache processes running, that% belongs to each domain and keep track of usage statistics for each domain.

3. On utilization of the database, it happens that one customer has a standard DB with too many records in the tables:

Check the statistics for use by managers of DBS DB for very large used periodically.

4. The use of database, number of simultaneous connections:

Limit the number of connections per hour for each user in the DB manager to avoid abuse of the number of simultaneous connections per user.

5. Amount of memory consumed by processes:

Limit the amount of memory used by each process of each user.

These measures, at a very basic level because they can be improved and specialized, they can gradually make improvements to the stability of the service of our dedicated servers and web hosting.

Spam Control Dedicated Servers:

Currently the traffic is really consumed by spam, or better known as “spam” we receive every day. Mailbox to mailbox received some, but others, some less, but looking globally between all mailboxes traffic wasted getting this kind of post is incredibly significant.

Precisely for this reason it is necessary to combat spam from all the alternatives and possibilities we have at hand.

In this case we will comment on this type of spam basically related to the service of web hosting and dedicated servers.

It is this type of case is mostly a series of tools called filters that basically analyzed word by word of every email that enters the server queue, according to the type of words and certain rules then there is a score to measure the probability that This email is considered an unwanted email and then a decision is made to it, move it to either a waste or tail of the client with a pass or identification mark (eg: add the word Spammer in the subject) so that the mail client can take action with this type of email marked.

One of the tools of this type is commonly used spamassassin; is effective to some extent so that their use should be considered.

This method of fighting spam is the difficulty that the mail is received in its entirety in the mail queue on the server and is then “classified” to some extent by the filter, which helps the client to be less bothered but the mail came the server so the bandwidth consumed was inevitably some other side effects are that when the receipt of spam from the dedicated server is massive (several emails in a short time interval) the server may rise as a result of prosesamiento Email classification for spam or not, is known as the peak loads on dedicated servers are dangerous because they can, under certain circumstances, cause problems in the stability of services.

As I mentioned before this method, although customer support Web hosting or ended in the owner’s mailbox, it does not prevent that email is received on the server and therefore consumes bandwidth inevitably.

So how to solve this problem?

Well, there are different solutions for different mail server, in the case of qmail, there are several that I am very effective in attacking the spam mails before they arrive at the dedicated server and consists of a series of patches to the mail server such as allowing analyze the server several rules, based primarily on the mail headers (eg mail from> rcpt to, and subject headers some special too) and find words within those headers criminalized abortion or closing the connection as a result have found at least one word of this kind.

This way the smtp connection is interrupted, and the email does not go to the mailbox of a dedicated server so that traffic does not consume any.

There are other methods maybe a little better or more accurate than to resolve this problem, but the web hosting world do not apply because it interferes with quality of service.

What is hosting?

May 31st, 2009

What is hosting?

Hosting (accommodation) is the process of storing files that constitute a web page on a computer that is connected to the Internet.

Each web page is actually a small file that is stored on a server by the hosting service provider (ISP = Internet Service Provider). When someone visits a website, the server sends a copy of the file navigation program or browser (browser) to the visitor. The browser processes the file to determine how to display the information correctly so that is formatted in a way that the web page designer intended.

The technology that allows web page hosting is complicated and costly. For this reason and because the sites generally have the same needs for housing, housing service is performed by specialist companies that operate server farms - huge banks of servers in the rooms - which are housed in different pages web sharing costs.

As the price of technology to hosting ido decreasing, so has the cost of hosting. The market is very competitive so it compensates to compare offers.

If your website is relatively simple, a shared hosting plan is most appropriate. The next level is a dedicated hosting plan. This includes having your own server in a server farm, but without sharing your computer with anyone else. Other benefits include greater control over information security. In return, the dedicated hosting usually involve higher costs.

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April 8th, 2009

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April 8th, 2009

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