Archive for the 'Databases' Category



Interesting Facts About Computer Rooms

Tuesday 2 June 2009 @ 5:28 pm

As the name may suggest to many, a computer room is a room in which computers and digital storage devices are kept. Computer rooms are synonymous with data centres or server rooms.

Increasingly over recent years, computer rooms have become more common. They have appeared across the UK, Europe and indeed the world, as global industry and governmental departments have switched, to a large degree, from paper-based storage across to digital storage.

This data might include banking information, email storage, pension details, Jobseeker’s Allowance or any number of other commercial and state related information. All these ones and zeros are kept, in most instances, in very secure conditions. The security of these details is of course paramount in ensuring that this valuable information is not misused by anyone, particularly names, addresses and financial details.

Computer rooms have become of great importance to the smooth functioning of government, of business and of society in general. The protection of these computer rooms may one day be considered of national importance. As they stand now, they are too widely dispersed to be a target for, for example, terrorists groups of malevolent foreign powers.

It would also be very difficult to discover the location of, for example, the details of everyone’s national insurance contributions. If these were located and somehow sabotaged, the consequences might be dramatic.

Naturally, these computer rooms are protected by security guards who ensure that no unauthorised personnel enter the premises. In terms of computer related protection, most computer rooms will have deployed firewalls, intrusion detection systems and VPN gateways. Firewalls basically prevent unauthorised access, whilst allowing outward communication. An intrusion detection system (IDS) monitors a network for malware, cracker activities or possible attack from disgruntled employees.

As they are such important locations, computer rooms are usually fitted with air conditioning which keeps the computer units at just the correct temperature. It should also keep the air at a suitable humidity. If the servers get too hot they can be permanently damaged. Similarly, if too much moisture builds up, this can have extremely damaging effects as well.

They should also benefit from a back up electricity supply, such as a diesel generator - as obviously if the electricity supply stops for some reason, this could have severe consequences for the data held in computer rooms.

Computer rooms are also invariably fitted with high specification fire sensors, which go off as soon as equipment starts to smoulder, as opposed to when it is actually on fire. Sprinkler systems are also in place in the unlikely event that a large scale fire develops.

It is clear then, that computer rooms play a vital role in all our lives, ensuring our most crucial information is kept safe and secure for government agencies and banks to access and use for our benefit. As long as this data is given the respect and security it requires, computer rooms are set to remain our main storage facilities.

Anna Stenning has advised on the building of many computer rooms around the UK.

[tags]computer rooms[/tags]




Why Use an Online Server Backup

Sunday 31 May 2009 @ 2:45 pm

Server Backup allows the organizations and consumers to get Enterprise-class online backup with higher presentation for their crucial data at a small cost. A Server is a computer program that provides information to all the other computers. Data saved in this server is very important for all the computers. Server Backup provides safety against the information deleted accidentally. Server is the life blood to the business. Important thing to consider while choosing online backup server is quality and availability of customers.

Categories of Online backup

Free Online Backup
Personal Online Backup
Secure Online Backup
Small Business Online Backup
Enterprise Online Backup
UK Online Backup
Server Online Backup

“Server Online Backup” is as follows:
The Planet- “The Planet Lowers Server Backup Prices”. The Planet is serving more than 22,000 businesses and also 7.7 million website all over the world. “The Planet Alpha” provides advanced services and support to the computer. At such a reasonable rate no one will like to leave their data unprotected.

Storage pipe Solutions - All types of business use Storage pipe services to decrease their operational costs. Usually customers completely rely on Storage pipe solutions because they are experience to restore data and have easy backup.

“Storage Guardian” “The Most Advanced Data Compression Technology” is used by Storage Guardian. Only the Storage Guardian executes “Bare Metal Restores”. Set up of Storage Guardian is very easy whether it is for one email or else for entire server. Software is installed only in one server. Storage Guardian has satisfied hundreds of customers and has ten years of experience. It provides protection to the business and life cycle management.

“Mozy Online Backup” is a secured and automatic backup service for any computer. Mozy Online Backup is simple to install without any external hard drives. For small or big corporations Mozy Online Backups is suitable for all any type of business. It is very easy to install and save.

“Data Deposit Box” With Data Deposit Box one can easily store and share their online backup data. It is very much ideal for small businesses and there are no procedure to follow. Their services are directly sold to the public by their resellers. Data Deposit Box is invisible on the background and continuously protects selected folders. It is automatic, compressed and is also securely shifted to any particular remote server. As soon as the software for Data Deposit Box is installed it can modify backup to as many files desired together.

iData Sure (http://www.idatasure.com) is an authority on Backup Servers. Click here to find more information about Data Backups. Art Gib is a freelance writer.

[tags]backup servers, data backups, remote backup[/tags]




Information about Online Server Backups

Thursday 21 May 2009 @ 1:57 pm

Online server backup helps you create an automatic backup for your computers and laptops. Business now prefers a paperless environment that means everything starting from the smallest to the biggest information is stored on the computer, which makes the need of an online server backup even more necessary. A business can change everything but the data is the most important thing which can t be changed or replaced with anything else.

You might be using a floppy disk, DVD, CD, tape or a USB device to create a backup for the important things, but these devises cannot be completely trusted upon as they have high chances of failure. All your dealing is done online and through the computer, so if you are not protecting your data correctly it means that you are putting your business at risk. Statistics show that usually the small business is more at risk because of data protect as they don t have a strong storage or backup system. 30 % of the small companies do not have a strong backup system and lose an average of ten thousand dollar, every time their backup system fails, most of them even shut down due to heavy losses.
The thing that matter the most in the backup system is how smoothly you can restore the data in case of an emergency. The questions like, the time that the backup system will require to restore the data, how hard it will be, etc are not realized by the owners unless they face a situation.

There are a few things that should be kept in mind before choosing the right kind of backup system. These can be about the kind of system that they use to provide backup, does restoring the data require extra help and support of the technicians, does it provide consistent backups, where is the backup stored, the time that will be required to get the backup restored, the cost of the data lost, how much will it cost the company to get the data restored and if there will be a backup for the emails also.

Virus is the most common and devastating thing that can happen in your company which makes is more necessary for you to have a good backup system in place. You can check online or even take help of professionals to get started with an online server backup system which will help you and your company.

http://www.idatasure.com is an authority on Backup Servers. Click here to find more information about Data Backups. Art Gib is a freelance writer.

[tags]servers, data recovery, server errors[/tags]




The Three Classes Of Databases

Thursday 14 May 2009 @ 7:52 pm

Microsoft Access is one of the leading business database systems around and despite its features it has a few limitations that may have business owners looking at other solutions. However these other databases have their own problems and it’s important to understand the whole picture before ditching your MS Access training in pursuit of another application.

The Heavyweights
Most of the criticism launched at Access is that it is not a “real” database and isn’t as robust and fully featured as products like Oracle. This is like saying you shouldn’t ride a bicycle because it doesn’t go as fast as a Formula One racer or carry as much cargo as a furniture truck.

The big databases certainly have more advanced features than MS Access. Training is pretty much mandatory on these applications because of this as they are nearly impossible to figure out on your own. However the databases created by these powerhouse solutions are substantially less subject to corruption, one of Access’s greatest weaknesses.

There is a reason that every company on the planet doesn’t use these applications. These heavyweight databases carry heavyweight price tags that break the budgets of many small businesses. They require courses well beyond typical MS Access training and that further increases their cost.

Free Solutions
Some businesses try getting around the price issue of the major databases by using one of the free database applications that are available. Many of these are developed to be robust, server-based applications that give you everything the major names do at no cost to you - no monetary cost that is.

Free databases aren’t distributed by companies so there is no technical support department you can call if you have a problem. User forums can help but you never know just how much actual experience some self-proclaimed expert has and an unwary user can get bad advice that will make a problem even worse. These applications are less often used in business than the commercial products, making it harder to find experienced database administrators or classes on par with the MS Access training that is available.

Microsoft Access
The Microsoft database application is an inexpensive solution with extensive technical support and one of the largest installation bases of any database in the world. MS Access training is not only freely available but certified by Microsoft so you can be sure you are getting quality instruction.

Access is not without its own limitations but with proper training and employment of best practices it can be a cost effective solution for small and large businesses alike. Although it excels at small applications used by a single person on one computer, it can be and is used for larger server-based solutions as well.

Detractors of Access often give narrowly-defined criticisms that consider only the shortcomings of the Microsoft product without balancing those against the drawbacks of their alternative solution. Keep a broad perspective and you’ll see that Access is a good choice for many database projects.

Author is a freelance copywriter. For more information on ms access training, please visit http://www.microsofttraining.net

[tags]ms access training[/tags]




Access Corruption Avoidance Tip 3 Of 3: Stay Connected

Thursday 14 May 2009 @ 6:03 pm

Most Microsoft Access training courses demonstrate how to use the database application but may tiptoe around the problem of database corruption. Using Access as a shared resource without understanding corruption is a recipe for disaster. In this article on avoiding Access data corruption, we show how important it is to keep your environment stable.

Avoid Wireless Networks
If users are employing their Microsoft Access training to make simple queries but not actually changing information, bad network connections aren’t a critical problem. Their access may be slow but there won’t be a problem with the database itself. However if users ever write to the database, a dropped connection or network congestion at the wrong time could corrupt important tables.

For this reason, it is strongly recommended that users who will be writing to the database never use Wi-Fi connections. Wireless networks are subject to interference from a number of sources outside of the control of the network administrators and even if they are 99% reliable, that 1% can lead to catastrophic database failure.

If the office needs Wi-Fi for some reason, limit the number of wireless users as much as possible and work to minimize outside interference.

Maintain WAN Connections
Typical Ethernet connections aren’t without their own flaws. While they are more reliable than wireless networks, a faulty switch or cable can create intermittent communication problems that can be hard to spot. These minor faults won’t affect web surfing or email but if they occur during a write operation to a database, the damage can be irreparable.

Of course, network maintenance falls outside the typical Microsoft Access training. So often, database administrators depend on the network staff to maintain a good system. However the database administrators can help pinpoint the problem if they notice, for example, a particular user seems to be the source of the corruption. That could indicate a problem in that user’s network card or the cable between the client and the hub.

UPS Systems Should Be Mandatory
Access database administrators find their hearts sink when the lights flicker. That momentary power interruption can cause client computers to shut down and if that happens in the middle of an Access operation, the main database can be lost.

Any user with Microsoft Access training should be using a computer with a UPS (Uninterruptible Power Supply). These units provide enough power to keep a computer running for several minutes in the event of a power failure. This allows the system to be shut down gracefully even in the event of a serious blackout. During minor power hiccups, they switch over so fast that users often aren’t aware anything happened.

When network and database administrators work together to create a stable, reliable computing environment, Access will experience far fewer incidents of data corruption.

Author is a freelance copywriter. For more information on microsoft access training, please visit http://www.microsofttraining.net

[tags]microsoft access training[/tags]




Access Corruption Avoidance Tip 2 Of 3: Avoid Dangerous Data

Thursday 14 May 2009 @ 6:02 pm

In regards to avoiding Access database corruption, we will explore some data types that are more subject to corruption. The best choice is simply to avoid them. However that’s like saying, “The best way to avoid an auto accident is not to drive your car.” Access database courses will show you how to use these data types, but we will show you how to use them safely.

Memo Fields
Memo files can indirectly cause corruption of the entire database. Even if you can repair the damage, contents of the memo fields are often lost. If you had important data stored there, it is gone. What do you do if you need to store large amounts of text in a record?

One alternative to memo fields is to store the text as an OLE object in Word format. This substantially reduces the chance of data corruption and is a more efficient method of storing a lot of text. Using OLE objects is a technique from advanced Access database courses.

If you still need memo fields, don’t put them in the main table. Store them in a separate table with a one-to-one relationship with the table using them. This way if the memo table gets corrupted, your other data is safe. Add more protection by splitting the memo table into a separate file stored on your back end.

Picture Files
Access database courses demonstrate how to include graphics such as JPEGs or GIFs in your applications. This might be a product picture in a catalog, an employee photograph, or document scans. While there are many applications where graphics are useful, those files are another big source of corruption. Again the ideal choice is to avoid them but if you need to use them, protect the rest of your database.

The solutions for using graphics in your Access database are similar to those for memo fields. Store your graphics is a separate table with a one-to-one relationship with the main data table. Put the table in a separate file stored on your network back end server.

Access 2007 Attachments
If you took an Access database course that covered Access 2007 then you would have learned about a new feature: attachments. An attachment is a way of using an outside resource that is less clumsy and less storage intensive than using OLE objects.

Unfortunately, they are just as subject to corruption. How do you deal with attachments? You guessed it - a separate table in a separate file.

If you use multiple types of data, they should each have a separate table and a separate file. For example if using both memo fields and pictures you would have a database file for each in addition to your main file. Remember that corruption can destroy the entire table so the more separation you have the more you contain the damage.

Author is a freelance copywriter. For more information on access database course, please visit http://www.microsofttraining.net

[tags]access database course[/tags]




Some Simple Database Questions Answered

Thursday 14 May 2009 @ 3:08 pm

This article answers some of the most common questions asked about databases. We explore what a database is and talk about why people use databases, when to use them and the difference between single and multi-file databases.

What is a database?
A database is essentially the solution to the management and manipulation of structured information. The phone book is the perfect example of ’structured information’ as it is a table which contains a record for each subscriber. Each subscriber record contains three fields: name, address, and phone number. The records are sorted alphabetically by the name field, which is called the key field.

Other examples of databases include club membership lists, library catalogues, stock item inventories, animal breeding programmes. The list is endless.

Why a database?
The primary, and most obvious, purpose of creating and maintaining a database is to have a better filing management system. The reason for this is so that all of the information that is inputted into the database is retrievable at any time that it is required.

Can you conceive of how complicated or time-consuming the task of data-retrieval must have been 100 years ago? Fortunately the progression of technology and software applications has occurred at such a rapid rate that we are now able to access vast stores of information at the click of a button.

Can I build a database?
Do not be intimidated by the idea of having to build a database, because with technological advancement it is not necessary to be highly skilled in database software to be able to create and maintain a database that will meet the specific requirements for which you need it.

With the construction of a database you have two options: build one from the ground up or make use of a pre-designed template. The advantage of using a template is that your database can be up and running in a few minutes because the basic functions are already there, though this sort of database might require some refining so that the database meets your specifications 100%.

If you have more time and more skill than a first-time database creator you can create a database from scratch. In doing so the first and most important step is to assess the user’s needs: establishing what information the user wants the database to store and supply. While databases are relatively flexible, and can be adjusted as needs require, it is important to have a general goal to which to work towards.

Single or multi-file databases?
A database can contain a single table of information, such as a club membership list. Or it can contain multiple files of related information, as is the case with a company’s ordering system where there are numerous files to keep track of the order, the stock item, the supplier’s details, etc.

These tables can all be linked to each other so that you can easily produce reports or answer database related questions when required. A multi-file database of this nature is known as a relational database, and it is relational databases that provide exceptional power and flexibility in the storage and retrieval of information.

You certainly should consider enrolling for Microsoft Access training where you will gain invaluable knowledge and information to assist you in creating a database to suit your present and future requirements.

Author is a freelance copywriter. For more information on microsoft access training, please visit http://www.microsofttraining.net

[tags]microsoft access training[/tags]




Some Things You May Not Know About Relational Databases

Thursday 14 May 2009 @ 2:56 pm

Many people use relational databases every day. Let’s explore how the relational databases come about, and what advantages there are in using them.

What is a relational database?
It was in 1970 that Ted Codd, a researcher at IBM, wrote a paper that outlined the ‘relational database model’, which was to become the cornerstone of database technology as we know it today. Relational databases have since grown in popularity to become probably the most preferred standard for databases. Other types of databases include the hierarchal model, the network model and the object model.

In their infancy databases were ‘flat’, meaning that the information was stored in one long text file, called a tab delimited file, whereby each entry was separated by a character, such as vertical bar or a backslash. This form of data storage made it difficult and time-consuming to search for specific information and even more difficult to create reports that contained only certain fields from each record.

On the other hand, a relational database is one that contains multiple tables of data that relate to each other through special key fields. It is, in essence, a collection of relations or tables. The standard fields and records are represented as columns (attributes) and rows (tuples). This allows for easy access to and interpretation of specific information.

Advantages of a relational database
A relational database is easy to understand and program, and is easily adapted or upgraded to suit changing requirements as the need arises.

A relational database has excellent security features. A relational database supports access permissions, which allow the database administrator to implement need-based permissions to access the data in database tables. Relational databases support the concept of users and user rights, thus meeting the security needs of databases. Relations are associated with privileges like create privilege, grant privilege, select, insert and delete privileges, which authorise different users for corresponding operations on the database.

A relational database minimises errors in several ways. There is a single storage location for any set of data, so data updates are simplified as it is not necessary to change the same information in all the applicable files, therefore the data will always be current, without a chance of old data remaining in an overlooked file. All data is validated upon entry to filter implausible values and can be cross-checked against existing information.

Logical structure of the data is separate from the physical data. The logical structure of the data does not depend on a relationship between rows. A query specifies a set of rows based on their attributes. This eliminates the oft-occurring situation where the physical sort order of data determines the results. i.e. you get the same result, regardless of the (sort) order of the rows.

Relational databases and Microsoft Access
Microsoft Access, an entry-level database creation and management solution, is undeniably one of the most flexible and user-friendly options available at present.

Enrol in an Access database course now to learn more about relational databases, the advantages and the set-up and management thereof.

Author is a freelance copywriter. For more information on access database course, please visit http://www.microsofttraining.net

[tags]access database course[/tags]




Access Corruption Avoidance Tip 1 Of 3: Split Your Database

Wednesday 13 May 2009 @ 1:57 am

Microsoft Access is an economical and easy to use database solution for small businesses. However anyone who has used the application as a shared network database knows that corruption can destroy all your hard work. While your Access database training will help, there are several tips that can reduce the chance of data corruption.

The Front End and the Back End
A good practice for a networked Access database is to split the database into two pieces. The front end contains information that users won’t change such as forms and reports. The back end holds the actual data. Splitting can be done with the wizard you learned about in Access database training.

The back end should be stored on a secure and shared server. It is the piece that will need to be backed up regularly and most protected against corruption. The front end will need to be archived but since it doesn’t change, even if it becomes corrupted it can easily be replaced from the archived copy.

Users can either each have a copy of the front end on individual client computer or they can share a common front end on the server. It should be write protected to minimize the chance of damage.

Speed Up Queries with Temporary Tables
Users often don’t realize just how much data is read or written when they query a database. Even people fresh from Access database training are often surprised by how many transactions a nested query takes.

For example, a query asking for all December sales in Ohio will first make a table of December sales then from that create a table of all Ohio sales. The problem is each read or write operation is a new opportunity for damage to the database if the system crashes or network connectivity is lost during the operation.

Storing intermediate results to temporary tables has two important benefits to the database. First, it greatly speeds up the query. Second it moves the chance of corruption to the temporary table rather than the main database. Losing temporary data means the user loses the query but can simply send the query again.

Split Out Temporary Files
Once you adopt techniques from your Access database training to use temporary tables, protect the main database further by putting those tables in a separate file. This third piece of the database should be stored on the back end server.

Since this piece is the most likely to be corrupted, separating it minimizes the spread of damage to your main database tables. Damage to these temporary tables may have a short term impact on users but this piece can quickly be rebuilt without impacting the overall database.

A few basic “best practices” like these keep your data secure and minimize the chance of catastrophic loss of information. Look for other articles with tips on preventing Access database corruption.

Author is a freelance copywriter. For more information on access database training, please visit http://www.microsofttraining.net

[tags]access database training[/tags]




Information Storage in Today’s Business Market

Sunday 10 May 2009 @ 1:29 am

In today s fast-paced business market and with the need to have information stored that can easily and quickly be accessed, many businesses are turning to collocation centers that store their customers telecommunication equipment on the secured facility s premises. Collocation facilities are cost-effective alternatives to storing hardware on-site because the costs are shared with the other facility s users, instead of being placed entirely on a single company, using an in-house server, which faces not only higher setup fees but also higher monthly costs for maintenance.

Collocation provides greater capabilities that surpass what individual companies could do on their own premises with their own resources. Collocation facilities provide a greater bandwidth capacity and a fast and reliable Internet service. Companies have access, through the collocation center that has large amounts of bandwidth piped through its facility, to a superior bandwidth capacity at a much cheaper rate than they could on their own.

Additionally, collocation facilities also offer a greater degree of security of the stored data and hardware than is used at many office locations. The stored data in collocation facilities is regularly backed-up as an added security measure. Business owners do not have to worry about backing up their information or maintaining their servers if they employ collocation facilities.

Nor do companies have to worry about power failures or generators that only last a few hours as collocation facilities have robust, extensive UPS (uninterruptible power systems) that will continue to run even during a utility power outage, summer black outs, or winter ice storms. Collocation also protects your data and hardware during floods, earthquakes, and fire because the facilities are located on high ground in geologically stable areas.

By not housing the servers and hardware on-site, companies do not have to spend tiring hours moving heavy equipment around or worry about where to house any additional hardware as the business continues to grow. Freeing up valuable space in offices by moving hardware and protected data into collocation facilities also provides businesses the room to comfortably grow. Another benefit is that it saves on high air conditioning costs that are often a result of trying to maintain the optimal temperatures for server function.

In addition to the added security and money saved, employing collocation facilities also opens up new possibilities and makes many Internet services, such as VoIP, more accessible to companies. For these and numerous other reasons, many companies are turning to collocation facilities to meet their business needs.

To find out more information about collocation and long distance service please visit http://www.xo.com

[tags]long distance service,collocation,high speed internet access[/tags]




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