BlackBerry sin not to death

While many BlackBerry recent failures, but the dependence of people on the BlackBerry, and the replacement cost of the platform than the BlackBerry is not enough to be eliminated. On the contrary, this issue is so prominent, just to prove the influence of blackberry growing up.

Recently, the Canadian smartphone maker Research In Motion (RIM) for BlackBerry (BlackBerry) mobile phone service network problems seem to continue. A few days ago, massive fault BlackBerry again, from the United States extended to the entire eastern North America, all BlackBerry users send and receive messages are a problem. While RIM was later clarified, saying that failure is not the services were completely disrupted, but the company's routine maintenance of the network longer than originally planned due to be extended, but there are a lot of pessimists that the BlackBerry will be "dead."

I can not agree with them, if you used the Toronto transit system, you will understand why the service interruption will not allow people to give up a BlackBerry.

Winter, snow is already on the Canadians is common, but the largest city in the country but only because a small amount of snow on the paralyzed. You will find the people who work open to the smooth operation of the car early from work, spent several local newspaper reported that pedestrians in the street layout slide, and even subway outage actually have a. Even if they have early warning of snow did not help. Suddenly, people seem to no longer rely on transport services, and light outage, and when the good times and bad subway, buses are running slow. It would appear that, compared with the Toronto Transportation Commission, RIM's run record becomes not so bad.

I have and like others, has complained that RIM's service is not good enough, can not allow users to understand the fault conditions. However, this response was somewhat improved, although the software upgrade is very bad. The concern about failure, simply because the BlackBerry platform is very prominent, more and more influential, and not because a large number of users, or the failure time of up to 3 hours. In fact, 3 hours can not receive mail, to the vast majority of people, how much can the impact?

Toronto transit system paralyzed, the Toronto Transportation Commission also tried to communicate better. Sometimes, the confusion of the system will tell us where mechanical failure; sometimes the alarm will be sounded; the most serious fault in a station identified as "emergencies." Yes, in these cases, you will want to switch to buses do not take the subway, but the fact is, you find that buses are late.

BlackBerry is now somewhat similar situation and this. Microsoft wanted to use RIM's unfortunate, "I think you should be willing to talk with the experts, they can tell you a stable platform for mobile e-mail, access the company's trust." Wrote one of Microsoft's publicity. But in fact, most users do not want to do is take risks with unfamiliar software. Windows Mobile 6 may give IT more control over the equipment and network access, but many companies prefer to experience one or two failures a year.

Users of the fault tolerance and their dependence on this service is directly proportional, and the opportunity cost of changing the platform also has a relationship. If your Blackberry problems, or your internal network server is a problem, you will immediately eliminate them? I think you would say this is not the right. You can take the time to make up work during the fault, so people would not need to find another, and this seems to Toronto Transportation Authority is trying to dozens of individuals into the bus. So, while we are angry, but once or twice a failure does not enable us to completely abandon the service provider and its products.







Recommended links:



VOB to Flash



A Very Nice MP3 Tools



Evaluate Games Board



Huang Ching-ASUS court Friday issued reputation infringement in Taiwan



For You Reference Tools



QuickTime To MPG



The Basics Of Intrusion Detection Rules



MTS To AVI



Higher heat blow, "Kabbah Wind" paper submitted until 15th of the month



Terminal And Telnet Clients Storage



Must have the heart by the five interview



Wizard Games Card



Alg.exe Error Easy Solution



Qiu Bojun believe love at first Sight, no one suggests



Foreign general manager of Intel Low-key arrival in shaping China's power structure



Sober worm RESURGENCE of rampant e-mail form

Easy to master with your line of sub-chain migration concepts and action

In practical applications, if the line sub-chain and the line moved Jingchang removed, then the block may not be reused in the free 绌洪棿, so in this case, we make use of space, it can be set to pctused high point during the operation mainly in the INSERT trigger line sub-chain operation. The line of migration caused mainly by the UPDATE operation.

Bank Link

Line links: Insert or Update cause, there is a different block of Row, row by different parts of different block address (ROWID) chain into a chain, can be set large DB_BLOCK_SIZE to reduce the occurrence of the link line, but can not be avoided (LOB) .

Bank Transfer: Update cause, as PCTFREE too small, ROWID unchanged, can be reduced by increasing the value of PCTFREE line of migration occurred.

Line sub-chain is not big enough DB_BLOCK_SIZE settings, so that the line for some big (like varchar2 (32666), blob, clob of length greater than the block size (eg 4K)) certainly can not save a block row, we need to keep separate line to a different block. in particular blob of this type, it is best to set up a separate table space to hold the actual data.

Contains a LONG / LONG RAW column, in this case, which is usually stored in the last Oracle maintain a LOB locator to allow quick access to the line outside the LOB. LOB locator, about 24 bytes, DISABLE STORAGE IN ROW save the line parameter to achieve outside the (scatter), regardless of data size of the row sub-chain is difficult to control (unless DB_BLOCK_SIZE by choosing large enough, can hold the line It is usually impossible). However, the line moved through the CREATE / ALTER TABLE command parameters PCTFREE and PCTUSED effective control.

Another line of links is the line occurred in the conduct of successful migration, such as UPDATE operation caused. When the update line to increase the size of the current free block is not enough space to lay down the line, then put the whole line to take out adequate space into a block (if not block up the necessary space for the entire line, line be divided into chain; if even if it is divided into chains still not enough space, then an error message "ORA-1650-55: Unable to extend).

Bank Transfer

If we want to update a row (update always allowed), and its line up, while the increase of the line is larger than the space required for block of free space. If we put a line in the extra space into another a block, while another line on the original block (which is the line of sub-link), so that block 100% of the original fill. This seems to only happen in a separate row, ORACLE will move this entire line to the other block can accommodate the space (this is the line of migration). This will remain in the original block in a line head, the first in line to retain the put the address of the actual line of block. The line links, but the application never know, use the SQL are no different, he just performance reasons. If the index to read through this line, the index will point to the first new block Not only is the use of two IO read about the index, plus a 1 IO to read this table to keep using PCTFREE free space per block, allowing OK still in the original block, not this kind, expansion.

If PCTFREE is 0, then all the free space will be used INSERT, UPDATE will line up to move to another block to fit the needs of expansion.

In the ideal case, set PCTFREE for the median size in line with the maximum values. For example, if the size of the median line is estimated at about 900 bytes, maximum line size of 1255 bytes, then set the PCTFREE value 10 (default) and 30 between the more reasonable.







相关链接:



MOV to MPEG4



AVI To MOV



Recorded with the popular film of your wonderful life



Infomation File And Disk Management



PDM selection: impact of selection of the "ways of the world" elements



Articles About Science - Screen Savers



flash game development Revolutionizing the



On FreeBSD5.2 common operations (setting) changes



Who In the sale of national sentiment!



ADSL slow down and eliminate the causes for eight summary



TD 3 tender cover is the key TO solve



Comparison E-Mail Tools



DivX To 3GP



Beijing-Shenyang Expressway: Breaking the "separatism," the first



Shop Themes And Wallpaper