Ip_hash.LVS: Using a Linux kernel cluster to implement a high-performance, highly available load-balancing server with good scalability (Scalability), Reliability (reliability), and manageability (manageability).The advantages of LVS are:1. Strong anti-load capacity, is the work in the Network 4 layer only for distribution, No traffic generated , this feature also determines its performance in the Load Balancer software is the strongest, the memory and CPU resource consumption is low.2. Low con
performance of the Equalizer IO will not receive large traffic impact.5, the application of a wide range, because LVS work in the 4 layer, so it can almost all applications to do load balancing, including HTTP, database, online chat room and so on.Disadvantages of LVS1, the software itself does not support regular expression processing, can not do static and dynamic separation , and now many sites in this area have a strong demand, this is the advant
performance of the Equalizer IO will not receive large traffic impact.5, the application of a wide range, because LVS work in the 4 layer, so it can almost all applications to do load balancing, including HTTP, database, online chat room and so on.
The disadvantages of LVS are:1, the software itself does not support regular expression processing, can not do static and dynamic separation, and now many sites in this area have a strong demand, this is t
The software proxy maintains an open connection to a series of servers. When a client accesses a server, it must go through the software agent, which can redirect a user's access to a server through some load balancing algorithms (such as a dnsround-robin, random method, Access tradeoff algorithm). This software agent method can detect the server panic or no response in time, and effectively avoid the failure access in the Dnsround-robin method.
Hardware
: Using a Linux kernel cluster to implement a high-performance, highly available load-balancing server with good scalability (Scalability), Reliability (reliability), and manageability (manageability).The advantages of LVS are:
Anti-load ability, is the work in the Network 4 layer only for distribution, no traffic generated, this feature also determines its performance in the Load Balancer software, the memory and CPU resource consumption is low.
Low configuration, this is a disadva
, these audio data is several PCM data frame compression algorithm compression obtains, to CBR's MP3 data each frame contains the PCM data frame is fixed, and the VBR is variable.iOS audio playback overviewAfter understanding the basic concepts we can list a classic audio playback process (take MP3 as an example): 1. Read MP3 file 2. Parse the sample rate, bitrate, length and other information, separate the audio frame in the MP3 3. Decode the isolated audio frame to get PCM data 4. Audio proces
)Photoshop's Best filter KPT6.0 (iii)Photoshop's Best filter KPT6.0 (ii)Photoshop's best filter KPT6.0 (i)
The KPT equalizer (KPT Equalizer) filter is a great filter for adjusting the sharpness and softness of the screen.
• Filter Extensis Photo Graphics
Photoshop Senior Assistant--extensis Photo Graphics (iii)Photoshop Senior Assistant--extensis Photo Graphics (ii)Photoshop Senior Assistant--extensis Photo
in the work, there must be a lot of users like KK Song bar, not the past KTV singing cost is too high, once again the line, if often go, not every user can afford. So the use of the computer karaoke OK singing, has become a lot of people's first choice, but the quality of karaoke is not very good how to do? Don't worry, the following small series to teach you how to optimize karaoke, let you have more fun K song.
Optimization method:
1. Right-click the volume icon at the taskbar to select t
, as well as tens of millions of netizens and you share music experience (through the embedded music home), and friends to share music .... In this mode, you can experience that kind of romantic petty bourgeoisie, it is like a taste of their own music feast, Italy is still not done!
Figure I
Free deformation two: Chat mode
Identity: Sportsman Soyou
Click on the "Chat mode" button, Cool Dog 2007 is a standard chat tool (as shown in Figure II), the difference is, you can not only listen to t
Changelog.
Config.mongos
Stores all mongos information for the current cluster
Config.locks
When storing lock-related information, when working on a collection, such as movechunk, you need to acquire the lock first to avoid multiple MONGOs migrating the same collection at the same time chunk.
Six, shard equalizationMongodb realizes auto-shard equalization, which is a process of monitoring the Shard chunk in the background, and when the chunks d
node and abstract node by type.#define Cf_size 0X00FFFFFF#define Cf_global 0x01000000#define Cf_settings 0x02000000#define CF_ABSTRACT 0x08000000Abstract nodes do not have corresponding object instances, like the abstract base class of C + +, in order to organize system structure according to the logical relationship, for example, node is abstract nodes. Global nodes have only one instance of an object globally, such as the playback control module PLAYER_ID. Set the node representation and syst
number of documents. Splitting is only a logical operation and does not affect the physical order of the documents in the Shard collection.Migration is managed by the software called the "balancer" equalizer, and its task is to ensure that the data remains evenly distributed across the nodes. This capability can be achieved by tracking the number of shard blocks. In general, when the number of shards in a cluster with the largest chunk of the block i
System.users collection. The document structure used to hold user information is {User:username,readonly:true,pwd:password hash}. where password hash Is the hash value generated based on the username and password. 2. Create and delete indexes: Creating and deleting indexes is one of the most resource-intensive operations of the database, so you should carefully schedule indexing 1). Indexing on a standalone server: Db.foo.ensureIndex ({"Somefield": 1},{"Background": true}) 2). Index on the repl
All along, Android support for Bluetooth is very confusing, can be said to be a lump of shit. Each version of the protocol stack is different, the earliest use of BlueZ, into the 4.x era, replaced by Google's own bluedroid. Change it, at least wait for it to be done again, results 4.2, 4.3, 4.4 of the bluedroid are all different. This is to me and other non-professional Bluetooth developers to develop Bluetooth manufacturing a great deal of trouble.Well, that's the end of the spit, it's time to
. The driver of the local device is usually closely connected to the Target Platform Based on Windows CE, and the driver of each local device has precise and special targets, these drivers are generally provided by the original device manufacturer (OEM. The streaming interface device driver is a user-level dynamic link library (DLL) used to drive installable peripheral components. The RTL8139 NIC driver is a stream interface device driver. Use Platform Builder or Embedded Visual C ++ 3.0 to gene
Linux installation driver-general Linux technology-Linux technology and application information. For details, refer to the following section. Check whether your machine can use a USB flash disk or a floppy disk in Linux;
If your motherboard disc has the source code installation package of Realtek PHY RTL8201CL For Linux
Run the following command as the root user:
Cd
Mkdir drivers
Mount/dev/cdrom/mnt/cdrom
Cd/mnt/cdrom
Cp
I bought a new TP-LINK wireless USB Nic, but the Tangle is that the Linux driver was not provided. Various Google solutions have finally been found, hoping to provide some clues for future users and avoid detours. First confirm your wireless network card model: TL-WN725N122TE1. System Environment: Ubuntu12.04.264 bit (32 bit theoretically) $ uname-aLinuxubuntu3.5.0-23-generic #35 ~ Precise1
I bought a new TP-LINK wireless USB Nic, but the Tangle is that the Linux driver was not provided. Various
Solution without sound in Linux-Debian information of the Linux release-details are as follows. The sound card is detected by realtek hd but does not sound.
Debian Series
# Apt-get install alsa-base alsa-utils
The simplest method for FreeBSD is
# Kldload snd_driver
For better results, you can also install the OSS driver.
Note: realtek is a soft sound card. The driver installation depends on the Motherbo
automatically, you can choose to run ADSL-start on the terminal before accessing the Internet!If you do not know the IP address of the corresponding DNS server, after dialing in windows, run ipconfig/all in the MS-DOS window to view the IP address of the DNS server (usually two ). If windows is not installed on the local machine, you can also operate on other hosts with Windows installed in the local region.
For example:I:> ipconfig/all
Windows 2000 IP configuration
Host Name ......: StarPrimar
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