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Jun262014

Shoretel Database Replication And Manipulation Of Maxdbqueries!



It really doesn't matter what VoIP system you installed they all generally have one architectural characteristic in common; the configuration database. Depending on the system, you might find a database engine that ranges in complexity from an Access Database to a full blown SQL database. The database will store configuration information, status information and often, call detail records that document phone system activities. The characteristic of the database that is consistent across all architectures is the fact that there can only be one "read/write" copy of that database!

Some phone systems distribute the database across multiple servers. ShoreTel, for example, distributes components of the database to application servers and distributed voice mail servers that characterize the single image architecture in a multi-site environment. We need to better how a change to the database effects the operation of the system, the bandwidth of the WAN links and the demand on the database engine. First, what constitutes a change to the database? Well clearly any configuration change that is made to the system. For example, adding or deleting a User are clearly going to cause a database update! Lets take a more subtle example, however. Lets consider what happens to a Agent in a Workgroup, located at a remote site, behind a distributed voice mail server. Each change that Agent makes on their Call Manager represents a database change. Logging into the system, and Logging out of the system are database changes. How about, accepting a call being offered to the Agent by a Workgroup?

Each of these Changes is communicated to the database. The change is first made on the "read/write" database and then replicated to the remote database copy. ShoreTel system processes use MS Distributed Component Object Model (DCOM) objects to share information from the configuration database among themselves and to write configuration information to the database. User configuration options are written to the database from Personal Call Manager, and the telephone interface. Each ShoreTel service on a distributed server caches it own copy of the configuration database. When a distributed server loses connection to the HQ server (read "read/write" database) any changes made are no longer received by the distributed server. If a DVM restarts without a connection the HQ database, services are started but are not functional. When the network connection is restored, the configuration is retrieved and again cached by each service as the services become functional.

If there is a flap in the WAN we note that the DVM will in fact reload a copy of the database. This movement of the database between the HQ server and the DVM servers clearly uses bandwidth and also makes additional demands on the database engine. In ShoreTel the database engine, is now MySQL. The question becomes how many simultaneous database access (read, modify, write) transactions can the MySQL server handle at one time? What happens if the transaction can not be completed? Does it queue and retry? In a large system of say 700 workgroup agents at a site, is it possible to overload the MySQL database with state change requests? If you dig down through the Server registry you will find the MAXDBQUERIES is set by default to 100. It has been our experience that, defending on the size of the system, it is sometimes necessary to dial this number back to eliminate overloading the database. This adjustment should be made only on the DVM's in the configuration and not on the HQ server. You will need to reboot your DVM servers after making this change. You should also note the difference between HEX and Decimal!

By: Peter Buswell

Article Directory:

DrVoIP is a full service VoIP and ShoreTel IP PBX installation, support and training telephony company. In addition, we offer many free services to support VoIP community to enable business people to make vital decisions when it comes to the installation and support of VoIP telephone systems. DrVoIP represents a team of Cisco, ShoreTel and Microsoft certified engineers led by a recognized industry leader with 40 years of telecommunications experi


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Jun252014

Technology :: Advantages Of Bluetooth



Below, are 10 benefits and reasons to use Bluetooth technology.

1. Wireless

As you probably already know, there are many benefits and advantages to using wireless devices. Along with improving safety as a result of eliminating wires you don't need, wireless also offers you plenty of other advantages. When traveling with your laptop or other wireless devices, you'll no longer have to worry about bringing connection cables.

2. Bluetooth is actually inexpensive

The technology of Bluetooth is cheap for companies to implement, which results in lower costs for the company. These savings are then passed from the company on to you.

3. Bluetooth is automatic

Bluetooth doesn't have you set up a connection or push any buttons. When two or more devices enter a range of up to 30 feet of each other, they will automatically begin to communicate without you having to do anything.

4. Standardized protocol

Bluetooth is standardized wireless, meaning that a high level of compatibility among devices is guaranteed. Bluetooth will connect devices to each other, even if they aren't the same model.

5. Low interference

Bluetooth devices almost always avoid interference from other wireless devices. Bluetooth uses a technique known as frequency hopping, and also low power wireless signals.

6. Low energy consumption

As a result of Bluetooth using low power signals, the technology requires very little energy and will use less battery or electrical power as a result. This is an excellent benefit for mobile devices, as Bluetooth won't drain the battery.

7. Sharing voice and data

The standard for Bluetooth will allow compatible devices to share data and voice communications. This is great for mobile phones and headsets, as Bluetooth simplifies driving and talking on your cell phone.

8. Instant PAN (Personal Area Network)

You can connect up to seven Bluetooth devices to each other within a range of up to 30 feet, forming a piconet or PAN. For a single room, you can also set up multiple piconets.

9. Upgradeable

Upgradeable is the standard for Bluetooth. There are newer versions of Bluetooth in the works, which offer many new advantages and backward compatible with older versions.

10. The technology stays

Bluetooth technology is a world wide, universal wireless standard. With it being as popular as it is, you can count on it being around for years to come. As more and more devices start to use Bluetooth technology, more manufacturers will be eager to make their products compatible. A chain reaction will occur, making Bluetooth the standard for cutting edge wireless.


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Jun242014

Capitol Fax.com - Your Illinois News Radar ยป Question of the day



* Congressman Aaron Schock and Bruce Rauner have apparently buried the hatchet. Greg Hinz...

Schock and Rauner had what I'm told was a productive peace-making session over several cups of coffee a few days ago.

* Greg is right, as usual. From Schock's Twitter feed...

* The Question: Caption?


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Dec082013

Animation And Visual Effects Jobs In The Filmmaking And Gaming Industries


Players can enter and move about in this globe and interact with objects as if inside it. Some of the games that are already on the market give a quite excellent thought of what virtual reality is and can do. Video games like Zelda, Halo, or Harry Potter enable players to enter into an atmosphere and interact with objects, but they don't allow the player to develop an atmosphere and that's what virtual worlds are all about. Sophie had nun-chucks that didn't genuinely hurt that significantly, but it was created up by Irvin's shotgun. There was also a card game that you could play and even though not truly beneficial in the actual game, it was exciting just to play around with them. However, Final Fantasy X, I think was the pinnacle of the Final Fantasy games. Comparable to a screensaver, the game is reminiscent of the tie-dye days of the 60's and 70's. Colorful blobs of light play about your field of vision, swirling about the edges of the pipeline you travel down. Stare at it long adequate and you might in fact really feel as even though you're moving.
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For the visual and auditory aspect of the games, the most likely dilemma would most probably be muscle discomfort and migraine headaches. Some have reported symptoms of arthritis. Artwork for video games goes via multiple processes, and it is not completely uncommon for artists to be asked to rush by way of the art notion for the game. This may possibly appear to go against the grain. It may look even counter-intuitive, especially if you were taught to exhibit leadership in a classic setting. However, rather of creating you seem weak or foolish, you show up as stronger and far more approachable. You play a real cute (yet quite aggressive) skeleton called Deadmund, who desires to get back to becoming a genuine boy (the new-age Pinocchio any person?). What colour were the balloons he was holding? These kinds of concerns are exciting and trigger the students to want to keep in mind particulars about the picture.

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Some of the fascinating activities discussed beneath need to help. The principal issue is to learn to integrate the programming logic and graphic environments. The actual fighting, just as in any Final Fantasy game, was great as usual utilizing entire new strategies. But these segments had been far between, and consisted mostly of taking out a handful of further enemies against a surreal black and white backdrop. So the firm has to develop greater methods to cease folks from carrying out this and it hurts the honest people who just want to play their game and have entertaining. Logically we know that these are untrue and impossible. With the proper supervision, a pc can open their eyes, and minds, to a complete new world of experiences. There is a high demand for workers in all of these locations at this time and it is expected that this will continue. If you are in a position exactly where you have to change your kind of employment due to job loss or some other cause there are quite a few training schools available to offer the background necessary to excel in this field.

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Nov252013

Golferaid: Use Golf Aid For Optimum Mind And Body Performance

visual game

watch dogs pc
Personally, a single of the most significant points for me in buying a game comes from the straightforward truth that the game comes with a game editor. A game editor is the tool utilized to design and style the games levels. It is how the designers built and programmed the game to play and you get to try your hand in this if the seller of the game releases this tool with the game. Based on this, one can download mobile telephone games to have full time entertainment. If the phone has the World wide web facility, then the entire procedure becomes quite significantly direct. They will never ever let the users go down. Due to the massive amount of controls that you will be able to use or have to use for diverse sorts of air craft they left a lot of of these unassigned. The explanation for this is many types of aircraft are very distinct such as the single engine planes and the multi engine ones. Yes you do get to fly in bombers and such, those large multi-engine behemoths that were the power property of the bombings in the war.
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This is further difficult when there are numerous achievable interactions within the game's context, ranging from character creation options to how certain in-game skills interact with one an additional. Now, best that off with a deadline, and you're all set to see programmers suffering from symptoms of arthritis, possibly with migraine headaches as the sarcastic cherry on prime. The technique that you use in the game have to be eye-catching adequate to engage folks who are playing it. It enables access to information stores and includes constructs that support concurrent programming. It is a single of the extremely old programming languages that are nevertheless in use. Chuck Esterbrook created it. Such industry leaders as the Nintendo set the foundation of electronic gaming. Other systems soon followed such as the Sega Genesis. The player who remembers most of the specifics should be declared winner.

It supports exception handling mechanisms and looping constructs. The enjoyable continues as the game finds newer, and even much more special approaches of sweeping you off your feet. The visual are fantastic, the dialogue captures the characters, the story is immersive and primarily based on your alternatives which can result in eight various endings, enabling endless replays, the puzzles are different every time, with power ups and a various gross monster chasing you. Over numerous years, games have progressed in terms of manage schemes and visual upgrades. Even with such changes, most things from gaming in the '80s have stayed intact. Most components that produced Pac-Man a classic game are nevertheless utilized in new game releases. In a auto racing video game, for instance, the course of the complete game might be created by a game designer but it is in the hands of programmers to give a lot more depth to the game. The plots and themes of hope being the basis of existence and becoming better off with out material belongings (or "machina") touched my heart in a way that I by no means believed a video game could ever do. Its not like this is all it had either.

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