Give two reasons why caches are useful. What problems do they solve? W translation - Give two reasons why caches are useful. What problems do they solve? W Chinese Traditional how to say

Give two reasons why caches are use

Give two reasons why caches are useful. What problems do they solve? What problems to they cause? If a cache can be made as large as the device for which caching (for instance, as large as a disk), why not make it that large and eliminate the device?

1. Caches allow faster access to data by storing data in a physically faster device (e.g. memory instead of disk).
2. Caches reduce the cost of finding data by requiring only a small number of items be searched.
3. Caches reduce the load on a slow physical devices, by handling most accesses to data on a faster, more capable device.
Caches solve the problem of slow data access, by keeping needed data in a cheap-to-access place.
Caches cause consistency problems, because the real data (for example, on disk) may be different than the cache.
Making a cache as large as the device may be useful if it can be made fast. However, the device is still needed to store data when power is turned off.
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給兩個理由為什麼的緩存很有用。他們解決什麼問題?對他們的問題是什麼引起?如果快取記憶體可一樣大的緩存的設備 (例如,磁片一樣大),為什麼不讓它那麼大和消除設備?1.緩存允許更快地訪問資料,通過將資料存儲在物理上更快的設備 (例如記憶體而不是磁片)。2.快取記憶體降低成本的查找資料的要求只有一個小小的項數進行搜索。3.緩存可減少慢的物理設備上的負載處理大多數對更快、 更有能力的設備上的資料的訪問。快取記憶體解決慢的資料訪問,以保持所需的資料,在廉價訪問的地方。快取一致性問題,因為 (例如,磁片) 上的真實資料可能不同于緩存。製作一個緩存一樣大的設備可能是有用的如果它能在快速。然而,仍然需要設備來存儲資料時,電源被關閉。
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給出兩個原因緩存是很有用的。?他們解決什麼問題?有什麼問題,他們會?如果緩存可以做得一樣大的裝置,其中高速緩存(例如,大如盤),為什麼不讓它大型並消除設備?

1。高速緩存允許在物理更快設備中存儲的數據(如內存,而不是磁盤),以提高數據訪問速度。
2。緩存減少只需要少量的物品進行搜索的查找數據的成本。
3。緩存減小負載一個緩慢的物理設備,通過處理大多數訪問數據的速度更快,更強大的設備上,
緩存解決了數據訪問緩慢的問題,通過保持所需要的數據在廉價訪問的地方。
緩存導致一致性問題,因為真正的數據(例如,在磁盤上)可以比高速緩存不同。
製造的高速緩存一樣大,如果它可以製成快速的裝置可能是有用的。然而,該裝置仍然需要在電源被關斷以存儲數據。
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給出緩存有用的兩個原因。他們解决了什麼問題?他們的原因有什麼問題?如果一個緩存可以像緩存(例如,大的磁片)一樣大的設備,為什麼不使它大,並消除設備?1。快取記憶體允許更快地訪問資料,通過存儲在一個物理上更快的設備(例如,記憶體,而不是磁片)。2。快取記憶體减少查找數據的成本,只需要一小部分的項目被蒐索。三.快取記憶體减少了一個緩慢的物理設備上的負載,通過處理大多數訪問更快,更能幹的設備上的數據。快取記憶體解决了緩慢的數據訪問的問題,通過保持所需的數據在一個便宜的訪問位置。緩存導致一致性問題,因為真正的數據(例如,磁片上的)可能比緩存不同。使一個快取記憶體一樣大的設備可能是有用的,如果它可以快速。然而,該設備仍然需要存儲數據時,電源關閉。
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