Scalability


Scalability in BIND 9 is better in several ways. One is that it can be used for zone storage methods other than zone files. Thus, on-demand loading of zone data from databases of your choice will be possible in the future. This is especially beneficial for those who run nameservers with thousands of zones that take a long time to restart (nameservers taking more than 30 minutes to restart is not unheard of).

Another scalability issue is zone transfers for such massive nameservers. A built-in named-xfer helps solve that problem.

Use of lightweight threading in the application programming helps make all this easy within one instance of named. The use of threads also enables named to take advantage of multiprocessor systems, such that the main resolver can be split in several threads each running on different CPUs on the system. The single-threaded model of BIND 4 and BIND 8 did not allow this; at best, named-xfer would run on a separate CPU.



The Concise Guide to DNS and BIND
The Concise Guide to DNS and BIND
ISBN: 0789722739
EAN: 2147483647
Year: 1999
Pages: 183

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net