original articles, reproduced please specify: reproduced from the electric Shang Sharong ec-shalom.com, specialized in electric business.The concept of caching has not been clear, resulting in the use of PHP write cache is also very not
TCP/IP protocol stack
This section briefly introduces the internal structure of TCP/IP and lays the foundation for discussing Internet-related security issues. TCP/IP protocol groups are popular in part because they can be used on a variety of
1. Clear DNS cache in Linux
There are two methods to implement DNS caching in Linux:One is to use DNS CacheProgramNscd (Name Service cache Daemon) is responsible for managing DNS cache.One way to implement DNS caching is to use bind to set up the
Windows 2000 automatically starts the DNS Client Service, which provides the Client name resolution and cache service. Your DNS query results are cached locally. When configuring a DNS server, if you do not have a good grasp of this principle, some
1 ARP Protocol OverviewIP packets are usually sent over Ethernet, but Ethernet devices do not recognize 32-bit IP addresses. They transmit Ethernet packets at 48-bit Ethernet addresses. Therefore, the IP drive must convert the destination IP address
1. TCP/IP protocol stack
Four-layer modelTCP/IP This protocol adheres to a four-tier model concept: The application layer, the transport layer, the interconnect layer, and the network interface layer.Network interface LayerThe base of the model is
Directory
Cache Fusion principle
What is Cache Fusion?
What is high availability
The difference between FAILSAFE and RAC
RAC and OPS differences
Differences between hot standby, RAC, and Data guard for dual machines
Cache fusion Technology and main background process (iv)
Overview: write down the original intent and motivation of this document, derived from the Oracle Basic operating Manual of the previous article. The Oracle Basic Operations Manual is
Cache Fusion principleThe background process for RAC has been described earlier, in order to gain a deeper understanding of how these background processes work, first understand how the multi-node management of shared data file access in RAC works.
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