綜合比較

圖4-10 ACCP傳入速率不同封包遺失率比較圖

圖4-11 ACCP Buffer容量不同封包遺失率比較圖

在這一節中，我們把ACCP與InS和HCCP相互做模擬比較。由圖4-12和4-13中，我們

可以看出ACCP能夠比InS更能夠去控制封包的遺失率，雖然在圖4-12中，我們可以發現

增加Buffer的容量可以幫助InS降低封包遺失率，但是卻沒有對其網路流量做控制，所以

整體下來的封包遺失率很高；而在ACCP中，由於我們在群集儲存中加入了速率控制，

所以能夠比InS更有效率的去控制擁塞。

在圖4-14和圖4-15中，我們可以發現ACCP能夠小幅度改善HCCP的封包遺失率，由於

圖4-12 ACCP與InS傳入速率不同封包遺失率比較圖

圖4-13 ACCP與InS的Buffer容量不同封包遺失率比較圖 圖4-14 ACCP與HCCP傳入速率不同封包遺失率比較圖

圖4-15 ACCP與HCCP的Buffer容量不同封包遺失率比較圖

我們在速率控制中加入群集儲存的觀念，所以我們能夠延緩去啟動速率控制的時間，同

時也延緩造成上游群集發生擁塞的時間，由圖4-15我們可以看出單一節點下與群集的容

量下，封包遺失率有顯著的改善。

我們把單一節點、InS、HCCP與ACCP一起比較分析，如圖4-16、圖4-17，我們可以

看出ACCP在傳送速率不同下，可以比InS、HCCP更有效率的去控制擁塞的情況，而在 圖4-16 ACCP與InS、HCCP以及單一節點在傳入速率不同封包遺失率比較圖

圖4-17 ACCP與InS、HCCP以及單一節點在容量不同封包遺失率比較圖

比較buffer容量不同的情況下，我們可以發現，雖然ACCP只比HCCP能夠稍微改善擁塞

的情況，但卻能夠大幅改善InS的封包遺失。

第五章

storage management)，去做網內儲存，這可以暫時地緩衝短時間的過多的封包。但是當 群集裡的儲存節點也無法再容納過量的封包時，速率控制就啟動讓流量減緩下來，並且

HCCP方法還好，在封包遺失率有小幅度的改善，因此也驗證所提出的方法之正確性與 有效性。

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