隨著信息化的不斷進行

，企業應用紫金橋實時數據庫的規模也越來越大，為了便於信息的處理和共享，往往整個生產數據的保存、分析
、處理、Web服務等最終都集中在一台服務器上。

這zhe台tai服fu務wu器qi能neng夠gou進jin行xing可ke靠kao安an全quan工gong作zuo的de重zhong要yao性xing是shi毋wu庸yong置zhi疑yi的de，如ru果guo出chu現xian服fu務wu器qi停ting機ji或huo數shu據ju丟diu失shi，就jiu會hui對dui生sheng產chan監jian控kong和he生sheng產chan管guan理li造zao成cheng重zhong大da的de影ying響xiang。所suo以yi必bi需xu采cai取qu合he適shi的de措cuo施shi來lai增zeng強qiang整zheng個ge實shi時shi數shu據ju庫ku係xi統tong的de穩wen定ding性xing可ke靠kao性xing。

有一種常見的方法可以大幅提高服務器的安全性，這就是集群。集群技術可如下定義：一yi組zu相xiang互hu獨du立li的de服fu務wu器qi在zai網wang絡luo中zhong表biao現xian為wei單dan一yi的de係xi統tong
，並bing以yi單dan一yi係xi統tong的de模mo式shi加jia以yi管guan理li。此ci單dan一yi係xi統tong為wei客ke戶hu工gong作zuo站zhan提ti供gong高gao可ke靠kao性xing的de服fu務wu。就jiu像xiang冗rong餘yu部bu件jian可ke以yi使shi係xi統tong免mian於yu硬ying件jian故gu障zhang一yi樣yang，群qun集ji技ji術shu則ze可ke以yi使shi整zheng個ge係xi統tong免mian於yu癱tan瘓huan以yi及ji操cao作zuo係xi統tong和he應ying用yong層ceng次ci的de故gu障zhang。一yi台tai集ji群qun服fu務wu器qi包bao含han多duo台tai擁yong有you共gong享xiang數shu據ju存cun儲chu空kong間jian的de服fu務wu器qi，各ge服fu務wu器qi之zhi間jian通tong過guo內nei部bu局ju域yu網wang進jin行xing互hu相xiang連lian接jie；當其中一台服務器發生故障時
，它所運行的應用程序將與之相連的服務器自動接管。

紫金橋實時數據庫現在已經支持群集和磁盤陣列技術，使用這些技術可以大大的提高係統的穩定性

、安全性和可靠性。群集和高可用性結合的服務器可將運行提升至99.99%。群qun集ji技ji術shu不bu僅jin僅jin能neng夠gou提ti供gong更geng長chang的de運yun行xing時shi間jian，它ta在zai盡jin可ke能neng地di減jian少shao與yu既ji定ding停ting機ji有you關guan的de停ting機ji時shi間jian方fang麵mian同tong樣yang有you著zhe重zhong要yao意yi義yi。集ji群qun係xi統tong通tong過guo功gong能neng整zheng合he和he故gu障zhang過guo渡du技ji術shu實shi現xian係xi統tong的de高gao可ke用yong性xing和he高gao可ke靠kao性xing
，集ji群qun技ji術shu還hai能neng夠gou提ti供gong相xiang對dui低di廉lian的de總zong體ti擁yong有you成cheng本ben和he強qiang大da靈ling活huo的de係xi統tong擴kuo充chong能neng力li。

群集係統圖如下所示：

圖tu中zhong的de兩liang台tai服fu務wu器qi分fen別bie具ju有you一yi個ge本ben地di盤pan用yong於yu安an裝zhuang操cao作zuo係xi統tong。服fu務wu器qi中zhong分fen別bie安an裝zhuang由you兩liang塊kuai網wang卡ka，其qi中zhong一yi組zu網wang卡ka用yong於yu網wang絡luo服fu務wu的de提ti供gong，另ling一yi組zu網wang卡ka通tong過guo一yi條tiao心xin跳tiao網wang線xian構gou成cheng了le一yi個ge內nei部bu互hu連lian的de高gao速su網wang絡luo，這zhe個ge高gao速su網wang絡luo是shi用yong於yu兩liang台tai服fu務wu器qi之zhi間jian的de信xin息xi傳chuan遞di。所suo有you要yao求qiu維wei護hu高gao可ke用yong性xing的de數shu據ju和he應ying用yong程cheng序xu代dai碼ma都dou存cun儲chu在zai共gong享xiang的de存cun儲chu設she備bei中zhong，這zhe也ye是shi該gai方fang案an的de關guan鍵jian部bu分fen。兩liang台tai群qun集ji服fu務wu器qi之zhi間jian通tong過guo專zhuan用yong心xin跳tiao檢jian測ce線xian路lu連lian接jie在zai一yi起qi，必bi須xu保bao障zhang這zhe條tiao專zhuan用yong心xin跳tiao檢jian測ce線xian路lu的de可ke靠kao
，他ta是shi整zheng個ge群qun集ji服fu務wu器qi可ke靠kao工gong作zuo的de基ji礎chu。群qun集ji服fu務wu器qi之zhi間jian通tong過guo這zhe條tiao線xian來lai傳chuan送song信xin息xi

，判pan斷duan是shi否fou其qi中zhong一yi個ge服fu務wu器qi出chu現xian了le故gu障zhang
，從cong而er進jin行xing工gong作zuo切qie換huan。

群集係統通過 Microsoft 群集服務實現故障轉移，MSCS guzhangzhuanyigongnengshitongguoqunjizhonglianjiededuogejisuanjizhongderongyushixiande，meitaijisuanjidoujuyoudulideguzhangzhuangtai。weileshixianrongyu，xuyaozaiqunjizhongdeduogefuwuqishanganzhuangzijinqiaoshishishujuku。danzairenyishike
，zijinqiaoshishishujukuzhizaiyigejiedianshangchuyulianjizhuangtai。danggaiyingyongchengxuchuxianguzhanghuogaifuwuqitingjishi，zijinqiaoshishishujukujiangzailingyigejiedianshangzhongxinqidong。meigejiediandoujuyouzijideneicun、係統磁盤、操作係統和群集資源的子集。如果某一節點出現故障，另一個節點將接管故障節點的資源（此過程稱為“故障轉移”）。要使紫金橋實時數據庫恢複到發生故障轉移時的那一點
，節點必須能夠訪問保持實時數據庫狀態的共享存儲區。

suoyiqunjifuwuqixuyaobaocundeshengchanshujushibaocunzaigongxiangdecipanzhenlieshang，zhegecipanzhenliebushuyuqizhongderenheyigefuwuqi，ershiguilianggefuwuqisuogongxiang。dangyitaifuwuqixitongfashengguzhangshi
，qunjixitonglingyitaifuwuqihuilijichengdanfashengguzhangfuwuqidegongzuo
，jianggongxiangjuan
、權限
、yonghuhewenjiangongxiangdengjinxingqianyi，congerbaozhengzhenggequnjixitongzuoyeyunxingdelianxuxing。dangfashengguzhangfuwuqixiufuzhongxinjiaruqunjixitonghou，zidonghuifudaochushidezhengchangzhuangtai。

雙shuang上shang麵mian的de介jie紹shao我wo們men可ke以yi看kan到dao使shi用yong紫zi金jin橋qiao實shi時shi數shu據ju庫ku支zhi持chi的de群qun集ji熱re備bei功gong能neng可ke以yi大da大da的de增zeng強qiang係xi統tong的de穩wen定ding性xing和he可ke靠kao性xing。另ling外wai群qun集ji熱re備bei係xi統tong不bu同tong於yu以yi往wang的de雙shuang機ji熱re備bei係xi統tong，後hou者zhe是shi主zhu要yao通tong過guo軟ruan件jian的de實shi時shi通tong訊xun來lai完wan成cheng信xin息xi的de共gong享xiang，而er群qun集ji熱re備bei係xi統tong依yi靠kao硬ying件jian來lai實shi現xian這zhe一yi點dian。所suo以yi和he雙shuang機ji熱re備bei係xi統tong相xiang比bi較jiao
，群qun集ji熱re備bei係xi統tong更geng加jia的de可ke靠kao，穩wen定ding。