And other mainstream database management system compared to, DB2 has its advantages also have their own deficiencies. In dealing with the performance of DB2 datawarehouse system should be very good, while DB2 optimizer to do for quite perfect, for the most complex queries can effectively be rewritten as the best statement, and the allocation of a reasonable implementation plan. DB2 in the closing mechanism has some shortcomings. This is associated with the DB2 design framework, the memory lock used to enhance efficiency while also optimizing the system requirements mentioned in the highest. If the user of the database itself, and application optimization to do less than optimal, then DB2 will be prone to the phenomenon of lock waits.
Broadcast station product designed to provide a secure web browser program, the method is to ensure that the internal network and external network between physical isolation, the usual method is by hand switches to control the physical isolation, but this will increase the operational problems, this broadcast stations can be combined with a hardware device, to achieve automatic control of the network connection and relay stations within the network and external networks to ensure the physical separation of purpose, with the product, you can through software control of broadcast stations when connected to external networks and to download or update the broadcast content, and download or update is complete, broadcast stations and outside the network and can automatically disconnect and connect to the Internet for internal network users to access, thus ensuring network security under the premise of simplifying the operation of broadcast stations. Most of the content of the site will be frequently updated, so users need to update the broadcast content, broadcast for the convenience of users of the site updates, Founder of the regular broadcast station design download feature, the user can update the site or users own law of demand customized for each site regularly to download broadcast strategy will be based on regular broadcast stations automatically download strategy completed on time and site updates.