Bug #4291
closed
ndncatchunks: Reduce initial timeout of iterative version discovery
Added by Anonymous over 7 years ago.
Updated over 7 years ago.
Description
The current version discovery uses a timeout (interest lifetime) of 4 seconds.
Every time you run the application, you need to wait for at least one timeout (default:2). Thus gathering a file takes at least 4 seconds (by default 8 seconds), even if the file contains only one chunk. This makes the iterative version discovery rather unusable.
My suggestion:
- Reduce the default timeout to 100ms.
- Provide a parameter to raise it, if necessary.
- Reduce timeouts for version discovery from 2 to 1.
This initial timeout will not affect the later RTO, given by '--aimd-rto-min' and '--aimd-rto-max'.
Here's a log of the two default timeouts for the version discovery:
klaus@klaus-Latitude-E7470:~$ ndncatchunks -v /test > /dev/null
Data: Name: /test/%FD%00%00%01%5E%8C%3AJ%1D/%00%00
MetaInfo: ContentType: 0, FreshnessPeriod: 10000 milliseconds, FinalBlockId: %00%5D
Content: (size: 4400)
Signature: (type: SignatureSha256WithRsa, value_length: 256)
Discovered version = 1505591183901
Timeout for Interest /test?ndn.MinSuffixComponents=3&ndn.MaxSuffixComponents=3&ndn.ChildSelector=1&ndn.InterestLifetime=100&ndn.Nonce=2776025280&ndn.Exclude=*,%FD%00%00%01%5E%8C%3AJ%1D
Timeout for Interest /test?ndn.MinSuffixComponents=3&ndn.MaxSuffixComponents=3&ndn.ChildSelector=1&ndn.InterestLifetime=100&ndn.Nonce=1921851405&ndn.Exclude=*,%FD%00%00%01%5E%8C%3AJ%1D
Found data with the latest version: 1505591183901
(it already includes the change of the Interest lifetime to 100ms)
This is a duplicate of #3793
It's more like a quick fix for #3793, because I couldn't figure out how to avoid timeouts completely.
- Related to Feature #3793: ndncatchunks version discovery: don't rely on timeouts added
I agree with the idea in general.
100ms is too small. A round-trip from Asia to Norh America is more than 200ms. 300ms is acceptable to me.
Makes sense, let's do 300ms.
- Status changed from New to Code review
- Description updated (diff)
- Status changed from Code review to Closed
- % Done changed from 0 to 100
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