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https://bro-tracker.atlassian.net/browse/BIT-1016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13804#comment-13804
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Robin Sommer commented on BIT-1016:
-----------------------------------
Merged. Three comments:
- while I generally like the bits_per_uid option, I'm wondering about the
performance impact. If it were a static number, UID could just use a
correspondingly sized array, vs. now using a relative expensive std::vector. Is
the flexibility worth that here? I think a good alternative would be to just
#define the bit length in UID, then we could at least easily increase it later.
- If we want to keep the bits_per_uid option, could we at least switch to
malloced array instead of std::vector with several pushs per UID?
- If keeping bits_per_uid, please add a test case that tries a few different
values for it.
- We could use "C-<hex>" instead of "C<hex>" to make it more obvious that the
first character is special. But not sure if it's worth it.
> Option to extend uids to 128 bit
> --------------------------------
>
> Key: BIT-1016
> URL: https://bro-tracker.atlassian.net/browse/BIT-1016
> Project: Bro Issue Tracker
> Issue Type: New Feature
> Components: Bro
> Affects Versions: git/master
> Reporter: rhave
> Assignee: Jon Siwek
> Priority: Low
> Fix For: 2.2
>
>
> Bro's uids are currently 64 bits, which makes them collide with a 50% chance
> after 5.1 x 10^9^ different uids (see
> http://en.wikipedia.org/wiki/Birthday_problem#Probability_table).
> I'm currently generating uuids of 128 bit to replace the native uids in bro,
> as I'm using them as keys in a database, but this requires rewriting of the
> bro-logs. I suspect that more people could benefit from an option to extend
> the uids to 128 bit.
> I've made a quick and dirty patch to change most of the uids to 128 bit
> (file_analysis uids are missing). The patch is ugly, and is only to show some
> of the functionality I would like: http://pastebin.com/GkaGejNc
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