本帖最後由 Niel 於 2011-12-27 03:19 編輯
uTorrent help say that
Enable caching of disk reads allows µTorrent to use the disk cache to sto ...
eric2046 發表於 2011-12-24 02:01 PM 
The help file is correct, but doesn't mean that I am wrong.
Since I am using a 100M connection and I need a reasonable enough RAM cache that can effectively prevent the hard drive from overloading (i.e. the download speed will drop to 0 kbps if the cache is full and the hard drive is busying on flushing the cache at the same time)
So, if you keep those 2 options disabled (i.e. disable write out untouched blocks every 2 min, and disable remove old block from cache) this will decrease the frequency of reads and writes from/to disk. However, you will require a much larger RAM cache to prevent overloading. According to my test result, I require 1.5-2GB of RAM cache to prevent 20 BT tasks from overloading my HDD under full speed downloading and seeding. If I choose to enable write out untouched blocks every 2 min, and enable the remove old block from cache feature. I can effectively prevent overloading by just using 512MB or even fewer RAM cache, while keeping the HDD workload at a reasonable amount.
So it is just a matter of taste on how you are going to plan your system's RAM usage. |
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發表於 2011-12-26 20:47
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