[Answered] Does higher cache-size-mb reduce fragmentation?

[axishero]

I'm using a embeded system with 64MB RAM to do 7*24 leeching.Should I increase cache-size-mb greatter than default 2MB to protect HDD? And with default setting,files that downloaded by transmission transfering to computer is very slow,<20mb/s,but files download by other non-bittorrent appz are very fast,up to 100mb/s.So far I known is the fragmentation problem,will higher cache-size-mb help?

[Jordan]

I don't think anyone's yet worked out a uniform rule for deciding how big the cache should be.

In general, large cache sizes will be beneficial if you're downloading at higher speeds. So if you're downloading multiple torrents at once, or if the swarms are fast, then a larger cache size will be helpful.

You might try making it 4 or 8 MB and see if things are better, worse, or no change.

[axishero]

Altered title
Does higher cache-size-mb setting help reducing fragmentati?

[Jordan]

Altered title
Does higher cache-size-mb setting help reducing fragmentatoni?

It could, in cases where you haven't already preallocated your files. But its main goal is to batch up disk IO, not to reduce fragmentation. The better solution is to use the default preallocation on a modern filesystem -- even ext4 will do -- where preallocation can be done at the filesystem level.