The migration algorithm proposed by this paper allow that the execution of process migrating and process going is concurring to the most degree . the migration algorithm speeds up the migration , reduces the communication overhead and avoids residual dependencies 本文基于進(jìn)程遷移的三個條件提出的進(jìn)程遷移算法,最大程度地將進(jìn)程狀態(tài)遷移和進(jìn)程的運(yùn)行并行起來,從而提高了遷移速度,網(wǎng)絡(luò)通信量也較小,而且也沒有對源節(jié)點的殘余依賴性。
Based on discussion on the significance of corba - based load balancing and analysis factors which influence load balancing in corba , this paper presents a kind of architecture and corresponding service migration algorithm which are based on corba trading service . configurations of cblb ( corba - based load balancing ) architecture are defined . and then in the following chapters it is showed that how to realize cblb model in a developed project as an example 本文首先說明了研究基于corba負(fù)載均衡的意義,詳細(xì)分析了corba構(gòu)造的分布式對象計算系統(tǒng)中影響負(fù)載均衡的因素,提出了一種通過corba交易服務(wù)來將負(fù)載均衡策略與corba體系結(jié)構(gòu)相結(jié)合的模型和算法,并結(jié)合實際開發(fā)的項目說明了實現(xiàn)的細(xì)節(jié)。
Chapter four briefly researches the principle of range migration algorithm . the relation and difference between frequency scaling algorithm and range migration algorithm are studied carefully . through the point simulation under ultra wide - band system parameters , we compare their imaging performances 第四章簡要介紹了距離徙動算法原理,著重分析了頻率scaling算法和距離徙動算法之間的聯(lián)系及區(qū)別,并通過超寬帶( uwb )系統(tǒng)參數(shù)下的點目標(biāo)仿真比較了它們的性能。
First , the thesis constructs a object cache model based on asynchronous messaging model which can improve access efficiency of object by establishing duplicate locally for remote object , and studies a serious of key problem , and presents object duplication algorithm , object migration algorithm , duplicate consistency algorithm , etc . second , to keep up with the dynamic changes of performa 一個是基于異步消息模型進(jìn)一步構(gòu)建了對象緩沖模型,通過在本地建立遠(yuǎn)程對象的副本,提高對象的訪問效率,研究并解決了其中一系列的關(guān)鍵問題,提出了對象復(fù)制算法、對象遷移算法、副本一致性維護(hù)算法等。
The first component is presented around two questions . to answer the question “ how to migrate ” , a process migration algorithm is proposed basing on three migration conditions . the second question is “ which process is the source host , which process is the destination host , which process should be chosen to migrate and when ? ” to answer the question , a improved means of migration mechanism is presented 在整個理論分析的部分,主要是圍繞著兩個問題進(jìn)行展開論述: ( 1 )如何遷移,使得進(jìn)程能夠在新主機(jī)上正確運(yùn)行,即進(jìn)程遷移算法; ( 2 )遷移機(jī)制,即由哪臺主機(jī)(源主機(jī))選擇哪個進(jìn)程向哪臺主機(jī)遷移(目的主機(jī)) 。