• November 18, 2017 /  Server & Programming
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    NTP Server Operation

    A NTP server can operate in three modes: unicast; anycast and multicast. In unicast and anycast modes, the client transmits a NTP request message to the server. The server responds with a NTP time message that the client uses for time synchronisation. In multicast mode, NTP time messages are broadcast at periodic specified intervals.

    NTP Reference Clocks

    Primary NTP servers can synchronise with a number of external reference time sources. The GPS (Global Positioning System) is often used to provide an accurate timing reference. There is also a number of national time and frequency radio broadcasts available. The WWVB radio time broadcast is transmitted from Colorado and covers most of the US. The DCF-77 radio time signal is broadcast from Frankfurt, Germany, and covers much of central and Western Europe. The MSF radio time signal is broadcast from Rugby, UK, and covers the British Isles and much of Western Europe. Other local time and frequency radio broadcasts include: TDF, France, and CHU, Canada.

    NTP Versions

    The current release of NTP is version 4. The only significant modification to the protocol between versions 3 and 4 is a slight header re-interpretation to accommodate IPv6.

    SNTP Simple Network Time Protocol

    SNTP is a simplification of the Network Time Protocol, where the complexities of the full-blown protocol are not required. SNTP can be implemented when the high synchronisation performance of NTP is not required. The message format of the SNTP protocol is almost identical to that of the NTP protocol. However, the complex subroutines designed to maintain a highly accurate synchronised time are removed or simplified. Small computers with reduced processing power, such as micro-controllers or monitoring equipment most often use SNTP. The SNTP and NTP protocols are fully interchangeable, a SNTP client can synchronise to a NTP server without any issues.

    More Information: NTP RFC’s

    The original Network Time Protocol was introduced in RFC 958 (Request for Comments: 958). The full NTP version 3 protocol and synchronisation algorithms are described in RFC 1305. The SNTP version 4 protocols are described in RFC 2030.

  • November 17, 2017 /  Server & Programming
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    As the servers are used constantly, they generate tremendous heat. When this heat increases beyond control, it may lead to damage of the devices and equipment. Being machines, the computers are delicate under the hood and are prone to damage due to carelessness. System crashes, reboots, hang-ups, untimely failures; poor performance and other problems can be created due to abnormal temperatures. Now, one way to keep these issues under control is to maintain the server room’s temperature. Sufficient ventilation, cooling and maintained temperature are the efficient ways to protect computers and servers.

    Maintaining the temperature

    The computers used at homes and for small offices come with internal cooling devices, which usually keep the desktops and laptops cool. Nevertheless, the server rooms that manage a number of systems do not have sufficient internal cooling systems. They have to be kept cool using an external cooling source, such as portable air-conditioner. Secondly, increased humidity inside the enclosed area can cause corrosion or rust. The maximum humidity level of a server room should not exceed 40 to 50 percent.

    Are portable air conditioners good solutions for cooling?

    The temperature of the server room should be steadily cool around-the-clock. If the room or storage area is connected to the central cooling systems, they may be shut down during the weekends or sometime late at night, depending upon the company’s working hours. If the cooling systems fail, the computer systems are prone to face the brunt.

    Portable air-conditioners keep the server rooms cool, as the temperature can be controlled individually depending upon the outside temperature. There are few air-conditioners that adjust the temperature according to the outside temperature on certain modes. They are self-contained units which do not require permanent installation. Business owners can move these units anywhere as required.

    A portable AC used in such places must have condensation tank to manage the humidity level, automatic restart function and proper ventilation to replace the hot air inside the room. These features not only keep the servers cool but also regulate fresh air and keep the machines working continuously. The automatic function keeps the air conditioners working continuously even when there is a power cut or failure.

    When it comes to the size of the air conditioners it is never an issue. The server closet of size 9000 to 12000BTU will be sufficient for the unit to fit in. While a 12K BTU unit requires 9 to 12 amps a huge unit of 14000BTU requires 20 amps. The air-conditioner should be thoroughly checked for the necessary requirements before installation.

  • November 15, 2017 /  Server & Programming
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    Another new function is the Read-Only Domain Controller (RODC) that allows IT staff to configure the Active Directory infrastructure as read-only. Such a configuration keeps Active Directory replication unidirectional, rather than bidirectional, as it is normally configured. An organization could use this setup once again in the branch office location where connections back to the central office may not be as fast or as reliable. In this situation, Active Directory would be configured at the central office and then sent out to remote sites before it is accessed. Combining configurations of Server Core, BitLocker and RODC provides a level of security in the Server 2008 release impossible in prior releases. Configuring machines as read-only guarantees the data cannot be compromised even if a hacker were able to penetrate perimeter defenses. Also, if a theft were to occur in which a server was stolen at a remote site, BitLocker guarantees the data contained on the machine to be indecipherable, while RODC controls allow for administrators to reconfigure the network with a few clicks of the mouse.

    Internet Information Services (IIS) is the server-side technology that first became available with Windows NT 3.51 back in 1995. With the seventh full release of IIS available for the first time in Server 2008, the service becomes fully configurable. Web administrators specify precisely which services they would like to enable – and which services they would like to disable. All of IIS 7 is also supported by the new Server Manager console.

    Versions and Licensing

    Several different product editions of Windows Server 2008 are available. Depending upon the version, each type is configured for specific hardware platforms, such as 32 bit or 64 bit, and versions are available with virtualization capability built in, while others leave the function out.

    It is important to understand Microsoft’s different available methods of licensing when purchasing server products. The Microsoft Open License is intended for smaller customers with less than 250 desktop computers in their network. As few as five licenses can be purchased and with these licenses, the owner has the right to transfer images to different machines or transfer a license to another machine.

    Microsoft Volume Licensing is intended for networks serving more than 250 computers. Within this group are several account levels that offer flexible payment scheduling. The same rights are established as with the Open License, but there are added discounts for the volume purchases.

    Both types of licensing come with the option to add Microsoft’s Software Assurance plan, which provides maintenance for Microsoft products.

    Software Assurance includes comprehensive support including training and the ability to speak with Microsoft representatives to assist in deploying and managing Server 2008 software. Software Assurance should not be overlooked in any Microsoft purchase. With the purchase, software upgrades are included in addition to Version Rights, which guarantees the purchaser the right, at no extra charge, to new editions of the product purchased should one become available during the length of the Software Assurance contract.

  • November 8, 2017 /  Server & Programming
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    Among other reasons, one of the most common reasons that can prevent an Outlook user from sending and receiving e-mails is Exchange Server database corruption. In such circumstances, the Exchange administrator should immediately restore the database from last available backup, failing which raise the requirements of using suitable Exchange Server Recovery utilities.

    For better illustration, consider a case of a Microsoft Outlook user who tries to send or receive an e-mail message and Outlook is configured to use Microsoft Exchange Server. When he/she tries to do so, one of the below mentioned error messages is received:

    Task ‘Microsoft Exchange Server’ reported error (0x8004011B): ‘Unknown error 0x8004011B

    As a result of this error message, Outlook user can no longer send or receive more e-mails.

    Explanation

    The above issue is most likely to occur in any of the following situations:

    1.You have installed Microsoft Outlook 2003 on Exchange 2003 Server or domain controller
    2.Microsoft Outlook profile is damaged
    3.An antivirus software or firewall is running that has prevented the connection of Microsoft Outlook and Microsoft Exchange Server
    4.Corrupted Exchange Server database

    User Action

    If you encounter the stated problem, you should consider implementing the following measures:

    1.Modify the security settings if Microsoft Outlook 2003 installation in Exchange 2003 Server or domain controller is the issue. For this, change the security settings from ‘log on network security’ to ‘Kerberos’.
    2.If Outlook profile is corrupted, you can recreate the profile and delete the affected one
    3.You should check the compatibility of your antivirus software with Microsoft Outlook 2003 and Microsoft Exchange Server 2003. Also, you can disable all antivirus programs running at server and client ends. In case of firewall issues, you might need to enable static port mapping.
    4.In case of Exchange database corruption problem, run Eseutil and Isinteg utilities after taking a complete backup. If this doesn’t help, you need to use a third-party Exchange Recovery Tool. Running an Exchange Server Recovery software can help you extract database content in a readable format.

    Stellar Phoenix Mailbox Exchange Recovery is a comprehensive exchange database recovery utility designed to repair corrupted Exchange database and restore its mailboxes as individual *.pst files. This Exchange Recovery tool supports MS Exchange Server 2007, 2003, 2000, and 5.5 and is also competent in restoring deleted mailboxes. The tool is compatible with Windows 7, Vista, XP, 2003, and 2000.

  • October 21, 2017 /  Server & Programming
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    OLAP Server is multi-user, high-capacity data manipulation engine which is specially designed to support and operate multi-dimensional data storage. Design of the OLAP server and structure of the data are constructed in such a way that can retrieve rapid ad-hoc information. With the help of this server rapid and flexible calculation and transformation of raw data can be done. OLAP server is able to answer swiftly to the multidimensional queries. This server is the ideal combination of modern technology and time management.

    Chief component of OLAP is OLAP server. This server acts as a bridge between the client and database management system or DBMS. This server can understand how data is organized in a certain database and acts specially to analyze these data. OLAP server is now available for all type of major database system. Olap server was primarily used in 1970 but then it was not called as OLAP server. Then in 1995 Edgar F Cod, father of relational database gave it the very name OLAP server. From there on OLAP server or Online Analytical Processing Server starts its journey.

    OLAP Server is indeed an intelligent business software tool. Application of OLAP is seen widely in business management, business reporting, business process management, marketing, budgeting, forecasting, financial reporting and some other complicated wings related to a business process. Output of OLAP is exhibited in matrix and pivot format. Rows and columns found in matrix are woven with dimension. On the other hand values of matrix are formed by measures. Work of OLAP depends on the OLAP cubes or hyper cubes or multidimensional cubes. In OLAP system by the word measures we mean some numeric facts. These types of numeric facts are generally derived from snowflake or star schema of tables. Measures can be categorized with the help of dimensions which are taken from dimension tables.

    To have this revolutionary service of OLAP server, you can take the help of online service provider. For this you have to fill an online form with your personal details, nature of your business and also with your contact number. If you want to gather more details you can take the help of the internet.

    About the Author

    Carlos Quijada is an IT professional associated with the field since the last 20 years. His core area of specialization is programming. Besides working with one of the leading IT services, he writes about technology and its benefits.For more information you can visit OLAP Servers and OLAP.

  • October 18, 2017 /  Server & Programming
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    CCP Games developed a massive server cluster to support the thousands of star systems and millions of unique objects that EVE Online, their flagship MMORPG, requires for it’s shared game universe.Their server system is so robust that they schedule a one hour down time every day to run backups, and the system can handle up to 25,000 players (and sometimes more) without collapsing.
    |Despite supporting over 50,000 simultaneous users, the server cluster requires just one hour of downtime a day for maintenance.|Only one hour a day of maintenance is required for this monster server cluster, which is designed to scale to support over 50,000 simultaneous users.|With over 50,000 users logged in at peak times, the server cluster can cope with node failures, hardware crashes, and still keeps on going – with only an hour of maintenance a day.|A daily downtime of an hour a day is all that’s required to keep this giant server cluster running, supporting over 50,000 users at peak times.[/spin]
    Because of the gigantic size of the database that players interact with, EVE Online doesnt lend itself to private server play, and there are no EVE Online private servers.
    Although some might disagree, the player experience actually benefits from a lack of EVE Online private servers.However, the lack of EVE Online private servers benefits players and helps with the game experience.No other game boasts as many simultaneous users in such a large shared universe, and this is the real appeal of EVE Online. Because EVE Online runs on a single cluster, there’s never a choice, like in World of Warcraft, or City of Heroes, to decide which server you’re going to be on based on the server your friends are on.
    You’re either on the Tranquility server (if you use the English language interface) or the Serenity server (if you’re using the Chinese language interface), and there are usually ten thousand or more players on simultaneously to interact with. Singularity, the test server run by CCP, is the third server cluster, and all players are recommended to install a test client and give input to the game’s development.

    By contrast with World of Warcraft, there are dozens, if not hundreds, of private servers out there, that will let anywhere from a hundred to maybe a thousand players log in simultaneously. For WoW, this is an opportunity to “grind in private”; if you tried doing that on EVE Online, you’d have a hard time hooking up with other players at all, due to the massive size of the universe to explore.
    Luckily for CCP, an EVE Online private server is beyond all but the largest research institutes and supercomputer sites – most people don’t have solid state drive arrays and massively parallel servers at home.

  • September 30, 2017 /  Server & Programming
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    Microsoft Outlook and Microsoft Exchange Server are two most important components to create a messaging and collaborative environment. In order to improve their performance, you can use Outlook in Cached Exchange Mode. In this mode, Outlook performs most of the email related operations from local hard drive, decreasing the amount of request to server for data and thus improve performance of the items stores in OST file (local copy of user mailbox on server). Even in Cached Exchange Made, to download new mails, you need to connect with Exchange Server. But in some cases, when you attempt to connect with Exchange Server, synchronization could not complete and thus the OST file could not be converted into PST. In such cases, you access user mailbox through Outlook, you need to manually Convert OST to PST using third party applications.

    With the Cached Exchange Mode, the local copy of user mailbox is synchronized with Exchange Server database upon log on to Outlook account and automatically converted into PST file after username and password verification. But in some situations, when you attempt to synchronize the OST file with Microsoft Exchange Server database, the process may not complete successfully and you come across the below given error message:

    “Error synchronizing folder [8004011B-3EE-8004011B-560]
    Unknown Error.

    Such situations render your user mailbox inaccessible. Here you need to find out the cause of this problem and Convert OST File by sorting out this issue.

    Cause

    You might come across this problem if there is some issues with the Exchange Server user profile or Mailbox. The issue could be corruption or inconsistencies in the problem or mailbox. In such cases, you need to recreate the user profile on Exchange Server.
    But even after recreating the user profile and mailbox, you would not be able to access the OST file as it is required to be converted into PST. This is potential through powerful and advanced third party OST Repair Tool.

    These applications use high-end conversion algorithms to effectively and quickly convert all of the OST file objects into PST. After you Convert OST to PST, the resulted PST file can directly be linked to the Exchange server profile or user mailbox. You can also import the PST file into Microsoft Outlook.

    Stellar Phoenix Mailbox Exchange Desktop is the best ever made and the most advanced tool to convert unusable OST files into usable PST file. This software converts OST file of Microsoft Outlook 2003, 2002, 2000, 98 and 97. This software is compatible with Microsoft Windows 2003, XP, 2000, NT4 (SP6), ME and 98SE.

  • September 22, 2017 /  Server & Programming
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    People who travel on business know its critical to stay in contact with the home office. But when you travel, being away from the office doesnt mean you can ignore your email (as much as youd like to). So after a brutal day of back-to-back meetings, the absolute worst thing is trying to untangle a technical issue especially if it means fooling with your email settings.

    Unable to check email? You may need to find a new SMTP Server
    If you have a problem and cant retrieve email on your personal laptop or smart phone, stand by for good news. The solution may lie in merely changing your SMTP server settings. So what is SMTP? It is a routine that email applications use to correctly route your email over the WWW. Email goes to an SMTP server before getting sent to the correct person. However if the SMTP server was configured to a local Internet Service Provider, it cant function if youre away from home!

    Be sure to select a global SMTP Server
    In order for your email to function around the globe, you must select a global SMTP server. Global SMTP servers allow you to read and send your business email from a cell phone or PC from any global location. Once you make the change, you wont have to reset your email settings again.

    Instructions for finding and changing an SMTP SMTP Server in Outlook
    See instructions for Outlook 2007:

    1) In the Tools menu in Outlook, go to ‘Account Settings’.
    2) Identify your email account, click Change
    3) Change the Outgoing email server (SMTP) to a global SMTP server (recommended links are below). Dont touch the Incoming mail server setting. Click ‘More Settings’.
    4) Click ‘Outgoing Server’ tab. Uncheck ‘My outgoing server (SMTP) requires authentication’. Click the ‘Advanced’ tab.
    5) Change your Outgoing server (SMTP) Port Number to 2525. Alternate ports are 25, 8025 or 587. For ‘Use the following type of encrypted connection’ select None.

    Congrats! Now you can check your email from any location around the world. This will save time and headaches next time you travel.

  • August 28, 2017 /  Server & Programming
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    Now, let us discuss some of the important features of virtual private server hosting. Internet is really becoming more and more popular these days. You would be quite surprised to know that virtual private hosting server comes at affordable price.

    Here, you will get complete security features and I can assure you one thing that if you opt for this service then you can definitely secure complete safety features for your online business.

    I would like to inform you that these services even allows you to get together numerous domains on a single server. Research plays a crucial role in this selection process. You need to understand one thing that the price of such a service is affordable and you just need to proceed further step by step. In this article, we are going to talk about this topic in detail.

    The web hosting companies recommend this service with excellent arrangements of domain name titles permitted with every disk space and bandwidth allotments. You can easily surf the Internet and look for your potential options. These days in worldwide business virtual hosting server topic is so popular. You really need to consider all these options once before opting for this efficient service. Make sure you carry out an extensive online and offline market research in this regard. And I am sure you do not need to spend much time in this regard.

    You can enjoys several advantages of this service. But first you need to consider all these crucial points once again. Administering a web server on the Internet is the most difficult job for a businessperson. Therefore, you need to keep all your options open in this regard.

    If you are looking for enhanced features and powerful hosting web server then this is certainly the right choice for you to Website. Well, in regard to this process you need to look for a popular and reputable hosting company. You need not take any decision quickly.

    So, these are some of the important features of VPS Hosting server which you need to consider when you are going to make a plan to opt this service for online business.

  • August 21, 2017 /  Server & Programming
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    Many individuals have the desire to own a private server. However, you will acknowledge that it is quite an onerous task especially having in mind that there are others more established in this line and already incorporate more players. However, you do not have to fear competing with them.

    To start with, it would be important that you acknowledge that the Servers have larger player bases simply because they have spent much more time in the system. In this case, they have incorporated some marketing strategies that have guaranteed them a clear customer or player base. When you are launching private server, it would be imperative that you ensure that the player base is thoroughly entertained in which case, they will be in a position to feel that they own the process and are not just part of money minting machine.

    There are three things that you would need to incorporate however.

    Start off by acknowledging the things that you would require to set the private server. In this case, you would look into issues like money, the hardware as well as connections. In addition, consider the necessary technical expertise that may be required and especially the financial implications. While on this, determine the private server type that you will be running. This will be determined by the topic and content of the server as well as the things that you care for. Please, do not go with what is popular in the market while you do not care about it. in addition, it would be important that you determine the necessary documentation for a private server. In this endeavor, you would be paying attention to the content of the server would be imperative as it is this that will attract players to your server. You can always hire out someone to create the script or content of the play. However even as they create it, it would be important that you have some knowledge as to how it is operating so that your input may be incorporated.

    Creating the script or content of the play is only part of the development. You definitely will need to be updating it from time to time in order to keep in line with the current updates provided by the emulator.

    Secondly, you would need to incorporate a genuine care for the server. While talking of the server, you would be looking at the sever, the players, the content etc.

    After you have incorporated these things in your server, you will be in a position to generate enough traffic. From this, you would be able to profit by encouraging the players to make donations. The donations may be made in exchange for services or items