【正文】
sulted in a couple of huge benefits, however, this has not been without its attendant problems and anomalies, such as performance tuning and erratic performance metrics, unresponsive virtualized systems,crashed virtualized servers, misconfigured virtual hosting platforms, amongst others. The focus of this research was the analysis of the performance of the Oracle VM server virtualization platform against that of the baremetal server environment. The scalability and its support for high volume transactions were also analyzed using 30 and 50 active users for the performance evaluation. Swingbench and LMbench, two open suite benchmark tools were utilized in measuring performance. Scalability was also measured using Swingbench. Evidential results gathered from Swingbench revealed 4% and 8% overhead for 30 and 50 active users respectively in the performance evaluation of Oracle database in a single Oracle VM. Correspondingly, performance metrics of 75% and 87% were obtained with 30 and 50 active users in a dual Oracle VM server, indicating performance scalability improvement with two virtual machines. Our results also revealed significant percentages in latency and bandwidth achievement by Oracle VM server which cannot be overlooked, despite some variances in results obtained from LMbench measurement. KEY WORDS:Performance and scalability。把單獨(dú)的服務(wù)器上的測(cè)試結(jié)果和在虛擬環(huán)境下有 30,50 個(gè)活躍用戶的使用下的測(cè)試結(jié)果對(duì)比。而在虛擬環(huán)境中, Oracle虛擬機(jī)是虛擬層,在它上面創(chuàng)建兩個(gè)虛擬機(jī)。硬件是64 位機(jī)物理服務(wù)器, 4 核 CPU, 8G RAM,一個(gè) 64 位虛擬機(jī)( 1 個(gè) CPU, RAM),和兩個(gè) 64 位虛擬機(jī)( 2CPU(每個(gè)上面各一個(gè) VM), (每個(gè) VM 各 ))。像任何一個(gè)新技術(shù),操作和過(guò)程不好可能造成很多缺點(diǎn)。給出一個(gè)全面介紹入門(mén)管理程序并徹底完成的對(duì) Xen虛擬機(jī)的性能評(píng)估。 第二章 相關(guān)工作 對(duì)虛 擬機(jī)環(huán)境的相關(guān)性能的評(píng)估,有效的工作已經(jīng)實(shí)施。而 LMbench是通過(guò)測(cè)試延遲性和頻寬給出硬件資源上虛擬技術(shù)的影響指數(shù)。而這份研究是評(píng)估 Oracle 數(shù)據(jù)庫(kù)在虛擬環(huán)境和非虛擬環(huán)境下的性能和可擴(kuò)展性的。這種節(jié)省時(shí)間與開(kāi)銷(xiāo)的優(yōu)勢(shì)促使商業(yè)愿意 投入更多時(shí)間來(lái)抓住新的機(jī)遇,而不是把精力集中在維護(hù)和管理上。想要一個(gè)安全的虛擬服務(wù)系統(tǒng),在應(yīng)用程序的可用性和進(jìn)程間的獨(dú)立性方面都是有改善空間的。相應(yīng)的 75%和 87%的性能指標(biāo)分別對(duì)應(yīng) 30和 50個(gè)活躍用戶在兩個(gè) Oracle虛擬機(jī)服務(wù)器環(huán)境下,表明兩個(gè)虛擬機(jī)可以提高性能可擴(kuò)展性。為了高品質(zhì)的回報(bào)的可擴(kuò)展性和后續(xù)支持也分別分析使用 30和 50個(gè)活躍用戶的績(jī)效評(píng)估。研究的焦點(diǎn)是分析 Oracle虛擬機(jī)服務(wù)器虛擬化平臺(tái)的性能針對(duì)那些 Baremetal服務(wù)器環(huán)境。在一個(gè)單獨(dú)的Oracle虛擬機(jī)下的 Oracle數(shù)據(jù)庫(kù),結(jié)果顯示使用 Swingbench獲得了 4%和 8%的開(kāi)銷(xiāo)對(duì)應(yīng)30和 50個(gè)活躍用戶的績(jī)效評(píng)估。 虛擬服務(wù)器技術(shù)有效的將軟件和物理設(shè)備分離開(kāi)來(lái)。虛擬服務(wù)器技術(shù)是現(xiàn)代計(jì)算機(jī)信息處理技術(shù)中用來(lái)減少計(jì)算時(shí)間和開(kāi)銷(xiāo)的工具,但是如果被錯(cuò)誤運(yùn)用,它將成為整個(gè)環(huán)境的安全威脅。例如, Swingbench 可以測(cè)試評(píng)估每分鐘的交易數(shù), LMbench 用來(lái)測(cè)量網(wǎng)絡(luò)頻寬和延遲, Httperf 則用來(lái)測(cè)試網(wǎng)絡(luò)服務(wù)器的性能。它的設(shè)計(jì)目的就是產(chǎn)生負(fù)荷壓力測(cè)試 Oracle 數(shù)據(jù)庫(kù)。我這篇研究的目的在于更新性能標(biāo)準(zhǔn),以及在 64位機(jī)上使用不同硬件,軟件和配置來(lái)擴(kuò)展這個(gè)實(shí)驗(yàn)。它更應(yīng)該提高傳統(tǒng)操作系統(tǒng)的虛擬機(jī)性能水平,因此滿足高性能應(yīng)用的需求不惜要唯一的硬件支持。他們也使用 LINPACK, LMbench和 IOzone測(cè)量并分析兩個(gè)開(kāi)放的虛擬機(jī)監(jiān)聽(tīng)器 Xen和 KVM的性能,并且提供一個(gè)定量和定性的對(duì)兩者進(jìn)行安全的對(duì)比。 第三章 軟件