Memcached Cache Mechanism + Microsoft cache mechanism Usage Details

1,Why Memcached

On 1.1 web servers, the number of requests received by iis is limited. When the traffic volume is large, the Website access will encounter a bottleneck, the processing method is to use an extra server to distribute requests (clusters) and publish a public ip address.

1.2 When the traffic volume reaches, requests are distributed through three servers, and each server undertakes requests. When a user logs on, how to share login information becomes a problem that needs to be solved (for example, storing login information in the database may cause poor performance ).Distributed cacheApplication scenarios.

2,MemcachedBasic Introduction

2.1 key MAX: 255 bytes, value MAX: 1 m, {key: key1, value: 123}

3Use Memcache in Windows

3.1 download memcache: www.code.jellycan.com/Memcache

3.2 installation service: cmd---Memcached.exe-d install

3.3 start service: cmd---Memcached.exe-d start (restart, stop off)

3.4 check whether the service is started: connect to the Memcache Console: telnet 127.0.0.1 11211, press enter, and enter the command stats to check the current service status.

3.5 uninstall memcached.exe-d uninstall

Problem: if the program cannot be started, solution: Download MSVCR71.dll and install it.

3.6 add, delete, modify, query, and input commands

3.6.1 add keyname 0 0 5 Press ENTER // The first 0 is a number, and the second is the expiration time, in seconds. 0 represents an unlimited period, and 5 represents the value length. For example, if the keyname exists, no operation is performed.

12345 // value content

3.6.2 get keyname // get the value of the corresponding value

3.6.3 delete keyname // delete

3.6.4 set keyname 0 0 5 Press ENTER // if not, add it. If yes, update it.

12345

3,C #Perform the following operations on memcache:

4,Microsoft cache Method

Demo

Business logic layer:

Interface: ICacheManager

             Get(          Set( key,           Set( key,  value,           Remove(              }

CacheFactory class:

              ICacheManager _instance =             m_LockObj =                                                (_instance ==                                          (_instance ==                            cacheType = ConfigurationSettings.AppSettings[                          (cacheType ==                              _instance =                                                       _instance =                       }

MemCachedManager class:

                                    m_CacheManager = MemcachedClient.GetInstance(            Set( key,               Set( key,  value,               Get(                          Remove(                     }

MsCacheManager class:

                                    m_CacheManager =  BaseCacheDAL(             Get(                           Set( key,               m_CacheManager.SetCache(key, value,              Set( key,  value,                Remove(                      }

Call:

    DataTable GetCarPList(               dt = cacheManger.Get(CacheKey.GetCarPList_Key())               (dt ==                    sql = .Format(                 dt = SqlHelper.ExecuteDataTable(com.Model.Base.DataBaseEnum.ruanmou, sql, CommandType.Text,                  cacheManger.Set(CacheKey.GetCarPList_Key(), dt,                        }

Important node configurations of web. config:

 <appSettings>     <add key= value=/>     <!--<add key= value=/>-->   </appSettings>

 <configSections>     <section name= type=/>     <section name= type=/>     <section name= type=/>     <section name= type=/>   </configSections>

 <cachingConfiguration defaultCacheManager=>     <cacheManagers>       <add expirationPollFrequencyInSeconds= maximumElementsInCacheBeforeScavenging= numberToRemoveWhenScavenging= backingStoreName= type= name=/>     </cacheManagers>     <backingStores>       <add encryptionProviderName= type= name=/>     </backingStores>   </cachingConfiguration>   <enterpriseLibrary.ConfigurationSource selectedSource=>     <sources>       <add name= type=/>     </sources>   </enterpriseLibrary.ConfigurationSource>   <memcachedgarden>     <add key= value=/>   </memcachedgarden>