Specify currency unit in the "Price" row of the storage compar… (#1755)

* Specify currency unit as CNY in the "Price" row of the storage comparison table

* Revert changes to the English version

* Change currency unit to USD

* fix

* fix space

* Update ram_and_cache.md

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Co-authored-by: Yudong Jin <krahets@163.com>
This commit is contained in:
Dr.XYZ
2025-06-12 20:57:47 +08:00
committed by GitHub
parent 7751ea1256
commit ceec0eaa3a
3 changed files with 21 additions and 21 deletions

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<p align="center"><id> &nbsp; 计算机的存储设备 </p>
| | 硬盘 | 内存 | 缓存 |
| ------ | ---------------------------------------- | -------------------------------------- | ------------------------------------------------- |
| 用途 | 长期存储数据,包括操作系统、程序、文件等 | 临时存储当前运行的程序和正在处理的数据 | 存储经常访问的数据和指令,减少 CPU 访问内存的次数 |
| 易失性 | 断电后数据不会丢失 | 断电后数据会丢失 | 断电后数据会丢失 |
| 容量 | 较大TB 级别 | 较小GB 级别 | 非常小MB 级别 |
| 速度 | 较慢,几百到几千 MB/s | 较快,几十 GB/s | 非常快,几十到几百 GB/s |
| 价格 | 较便宜,几毛到几元 / GB | 较贵,几十到几百元 / GB | 非常贵,随 CPU 打包计价 |
| | 硬盘 | 内存 | 缓存 |
| -------------- | ---------------------------------------- | -------------------------------------- | ------------------------------------------------- |
| 用途 | 长期存储数据,包括操作系统、程序、文件等 | 临时存储当前运行的程序和正在处理的数据 | 存储经常访问的数据和指令,减少 CPU 访问内存的次数 |
| 易失性 | 断电后数据不会丢失 | 断电后数据会丢失 | 断电后数据会丢失 |
| 容量 | 较大TB 级别 | 较小GB 级别 | 非常小MB 级别 |
| 速度 | 较慢,几百到几千 MB/s | 较快,几十 GB/s | 非常快,几十到几百 GB/s |
| 价格(人民币) | 较便宜,几毛到几元 / GB | 较贵,几十到几百元 / GB | 非常贵,随 CPU 打包计价 |
我们可以将计算机存储系统想象为下图所示的金字塔结构。越靠近金字塔顶端的存储设备的速度越快、容量越小、成本越高。这种多层级的设计并非偶然,而是计算机科学家和工程师们经过深思熟虑的结果。

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<p align="center"> Table <id> &nbsp; Computer storage devices </p>
| | Hard Disk | Memory | Cache |
| ---------- | -------------------------------------------------------------- | ------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------- |
| Usage | Long-term storage of data, including OS, programs, files, etc. | Temporary storage of currently running programs and data being processed | Stores frequently accessed data and instructions, reducing the number of CPU accesses to memory |
| Volatility | Data is not lost after power off | Data is lost after power off | Data is lost after power off |
| Capacity | Larger, TB level | Smaller, GB level | Very small, MB level |
| Speed | Slower, several hundred to thousands MB/s | Faster, several tens of GB/s | Very fast, several tens to hundreds of GB/s |
| Price | Cheaper, a few cents to a few dollars / GB | More expensive, tens to hundreds of dollars / GB | Very expensive, priced with CPU |
| | Hard Disk | Memory | Cache |
| ----------- | -------------------------------------------------------------- | ------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------- |
| Usage | Long-term storage of data, including OS, programs, files, etc. | Temporary storage of currently running programs and data being processed | Stores frequently accessed data and instructions, reducing the number of CPU accesses to memory |
| Volatility | Data is not lost after power off | Data is lost after power off | Data is lost after power off |
| Capacity | Larger, TB level | Smaller, GB level | Very small, MB level |
| Speed | Slower, several hundred to thousands MB/s | Faster, several tens of GB/s | Very fast, several tens to hundreds of GB/s |
| Price (USD) | Cheaper, a few cents / GB | More expensive, a few dollars / GB | Very expensive, priced with CPU |
The computer storage system can be visualized as a pyramid, as shown in the figure below. The storage devices at the top of the pyramid are faster, have smaller capacities, and are more expensive. This multi-level design is not accidental, but a deliberate outcome of careful consideration by computer scientists and engineers.

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<p align="center"><id> &nbsp; 計算機的儲存裝置 </p>
| | 硬碟 | 記憶體 | 快取 |
| ------ | ---------------------------------------- | -------------------------------------- | ------------------------------------------------- |
| 用途 | 長期儲存資料,包括作業系統、程式、檔案等 | 臨時儲存當前執行的程式和正在處理的資料 | 儲存經常訪問的資料和指令,減少 CPU 訪問記憶體的次數 |
| 易失性 | 斷電後資料不會丟失 | 斷電後資料會丟失 | 斷電後資料會丟失 |
| 容量 | 較大TB 級別 | 較小GB 級別 | 非常小MB 級別 |
| 速度 | 較慢,幾百到幾千 MB/s | 較快,幾十 GB/s | 非常快,幾十到幾百 GB/s |
| 價格 | 較便宜,幾毛到幾元 / GB | 較貴,幾十到幾百元 / GB | 非常貴,隨 CPU 打包計價 |
| | 硬碟 | 記憶體 | 快取 |
| -------------- | ---------------------------------------- | -------------------------------------- | ------------------------------------------------- |
| 用途 | 長期儲存資料,包括作業系統、程式、檔案等 | 臨時儲存當前執行的程式和正在處理的資料 | 儲存經常訪問的資料和指令,減少 CPU 訪問記憶體的次數 |
| 易失性 | 斷電後資料不會丟失 | 斷電後資料會丟失 | 斷電後資料會丟失 |
| 容量 | 較大TB 級別 | 較小GB 級別 | 非常小MB 級別 |
| 速度 | 較慢,幾百到幾千 MB/s | 較快,幾十 GB/s | 非常快,幾十到幾百 GB/s |
| 價格(人民幣) | 較便宜,幾毛到幾元 / GB | 較貴,幾十到幾百元 / GB | 非常貴,隨 CPU 打包計價 |
我們可以將計算機儲存系統想象為下圖所示的金字塔結構。越靠近金字塔頂端的儲存裝置的速度越快、容量越小、成本越高。這種多層級的設計並非偶然,而是計算機科學家和工程師們經過深思熟慮的結果。