collect MB of logs every day.
5. zabbix
You can use zabbix to track network devices, services, servers, and applications for traditional Security Logging and analysis, as well as performance management and capacity planning.
6. firegen
Analyze firewall logs of mainstream Firewall vendors, such as Cisco, zhanbo, SonicWall, FortiGate, and race gate, which can identify and interpret recorded events, inject more meaningful information into t
install and update network software on a large number of remote PCs.◆ In addition to Windows, Many operating systems lack VPN customer software, such as Linux, Mac, Solaris, and BSDI.◆ The remote PC used for confidentiality lacks security.◆ Brings new security breakthroughs. Hackers can conduct U-turn attacks on remote PCs to undermine the company's network security. In a U-turn attack, hackers obtained access to insecure pcs of Independent Online workers and connected them to the company's net
set and apply, no additional server or hardware costs. The disadvantage of this method is that the additional load on the existing Server is increased. The load varies depending on the number of APS you provide and the number of customers who use these aps ). The server may fail to execute other tasks. If the same server also provides firewall functions, additional loads may prompt other servers or adopt different methods.
The second method includes using a wireless ap that contains the built-i
number of customers using these aps ). The server may fail to execute other tasks. If the same server also provides firewall functions, additional loads may prompt other servers or adopt different methods.
The second method includes using a wireless ap that contains the built-in Virtual Private Network Gateway Service. Companies such as SonicWall, WatchGuard, and Colubris currently provide a single chassis solution. This solution integrates AP and vi
The principle of fault detection in firewall systemAs most computers use Windows systems, firewalls also have their own systems, usually Linux, and computers, firewalls, if there is a failure, can be divided into software failures and hardware failures, hardware failures are more obvious, easy to judge, and software failure because the firewall is usually no information display or display of the small amount, it is not easy to judge, this need through the terminal software, the use of dedicated
connections, although this may make users who have been rejected unhappy. Rate limiting Technology ensures that applications or users can only use the limited maximum available bandwidth.
Select an appropriate WAN optimization vendor
WAN optimization equipment and software usually need to be deployed simultaneously at the sending and receiving ends. Well-known WAN optimization devices include Dell SonicWall WAN accelerators, Riverbed Steelhead, Cisco
. Because generally speaking, the smaller the office size, the fewer users, the lower the risk faced.
As a result, simple packet-filtering firewalls are sufficient for small offices, such as those that are randomly brought by many DSL or cable routers. These include broadband routers from companies such as D-link, 3Com, Netgear and Linksys. In addition, WatchGuard Firebox Soho, Symantec Firewall 100, global technology company Gnat, NetScreen and SonicWALL
firm, said VoIP users must have a clear understanding of the IP infrastructure that this technology relies on. "Threats to IP networks, such as viruses, fall within the context of data security, but this threat also affects the quality and reliability of VoIP voice services." "In fact, compared to conventional data traffic, including VoIP voice, the various real-time traffic is more sensitive to network anomalies, the bottom line of VoIP security is the security of data network first." As Macho
price may be slightly more expensive)When using the head method to buy the license, we should take into account the development trend of the enterprise. Some companies may meet the licensing limit in six months. Also carefully record how many systems have antivirus software installed, and modify the records as the enterprise workstation and server updates are replaced.10, a reasonable priceIf the license is less than 50 people, the annual license fee per head is about 30-45 dollars. If the comp
time of the data in the communication line.Transmission time = transmission distance/transmission speed(transmission speed is approximately 2x10^8m/s)
Processing time: The time at which data is stored for forwarding in each router.Processing time is more difficult to calculate.
Response time = (packet bits/bandwidth) + (transmission distance/transfer speed) + processing timeDownload speed = number of bytes/response time of dataWhat is throughput
a garbage collector over the next decade, we turned to an algorithm that was decades old. Go's new garbage collector is a concurrent, tri-color, tagged scan collector, an idea that was first presented by Dijkstra in 1978. Compared to most enterprise-class garbage collectors today, this is a highly differentiated choice, and we think the algorithm is well suited to the properties of modern hardware and the latency requirements of modern software.
After reading the above statement, you may
Web application, the essence is a variety of Web content from the Web site to reach the browser, presented to the user. The less time a user wants to get web content, the better. From the perspective of Web sites, there are two major metrics: throughput and concurrency, which need to be addressed when a large number of users are concurrently accessing the latency problem. Throughput refers to the number of
"high throughput" or "low latency" preset configuration. They should provide initial configuration for further applications. For example
[Root @ bkjia ~] # Tuned-adm list-Balanced-Desktop-Latency-performance-Network-latency-Network-throughput-Powersave-Throughput-performance-Virtual-guest-Virtual-hostCurrent active profile:
may be larger than 12 bytes in practice. Here I use the minimum value. Each frame requires a fixed overhead of 20 bytes. Now let's calculate the actual throughput of a single port of the switch: 148,809 × (64 + 8 + 12) × 8 ≈ 100 Mbps, through this formula, we can see that the actual data exchange volume accounts for 64/84 = 76%. The "line rate" data throughput of the switch port link is actually only 76 Mb
, are identical to the serial collector. The work process is as follows:Parnew is the preferred new generation collector for virtual machines in server mode, and in the Cenozoic, only the Parnew collector can work with the CMS collector in addition to the serial collector.
Parallel scavenge collector, Parallel old collector
The Parallel scavenge collector is a new generation collector and is also a parallel multi-threaded collector using the replication algorithm. It is different f
: The target of the "throughput priority collector" is to achieve a controllable throughput of throughput () throughput is the ratio of the amount of time the CPU uses to run user code versus the total CPU time, that is, throughput = Run user code time/(run user code time +
can reduce garbage collection time. Typically used on multi-threaded multiprocessor machines. Use -XX:+USEPARALLELGC. Open. The parallel collector, introduced in the j2se5.0 66th update, has been enhanced in Java SE6.0--the ability to heap older generations for parallel collection. If the older generation does not use concurrent collections, it is a single thread for garbage collection and therefore restricts the ability to scale. Open with -XX:+USEPARALLELOLDGC .1. Use -xx:parallelgcthreads= t
ICIC:Inter Cell interference coordination, inter-cell interference coordination technology. For cellular network cell throughput is the key limit of the target is the cell disturbance, especially the cell edge users. Because the LTE system supports a frequency multiplexing factor of 1, the meticulous management of inter-cell interference is particularly important.The Icic design guideline is to increase the throug
[Performance Test] LoadRunner Results Analysis –tpsFor the relationship between throughput rate and TPS, how to use this in the analysis of results, after personal experience and friends to discuss, put forward the following suggestions to guide, welcome the colleague to correct. Related definitions
response time = Network response time + Application response time
response time = (N1+N2+N3+N4) + (A1+A2+A3)
tps:trasaction
check whether the vswitch backboard bandwidth is sufficient
The backboard bandwidth is the maximum amount of data that can be transferred between the vswitch interface processor or interface card and the data bus. The higher the bandwidth of A vswitch's backboard, the stronger the ability to process data, but the higher the design cost. However, how can we check whether the bandwidth of A vswitch backboard is sufficient? Obviously, the estimation method is useless. I think we should consider th
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