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https://issues.apache.org/jira/browse/CASSANDRA-17048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17430755#comment-17430755
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Benedict Elliott Smith commented on CASSANDRA-17048:
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Without commenting on the patch overall, I would prefer not to proliferate new
varieties of UUID. We already have v1 time UUID, and v7 is in
[draft|https://datatracker.ietf.org/doc/html/draft-peabody-dispatch-new-uuid-format#section-4.5]
with the IETF. I think it would be preferable to either use v7 UUID, or to use
v1 UUID but to serialise them to string so that they sort lexicographically
(this is a pretty simple shuffle).
As part of CEP-14 I will be introducing a patch to introduce a {{TimeUUID}}
class to represent our time UUID usages that stores the data internally in its
lexicographic order, so it would be quite simple extend this and modify
{{toString}} (and {{fromString}}).
I also anticipate that in the near future we will begin issuing nodes in the
cluster a globally unique id, so that globally unique UUIDs may be issued
without any probabilistic component, so that any other advantages of ULID will
likely be obsolete very soon.
I assume this is already in use for supporting S3, but I think the aims of the
patch can probably be achieved without necessarily adopting ULID within the
Cassandra codebase?
> Replace sequential sstable generation identifier with ULID
> ----------------------------------------------------------
>
> Key: CASSANDRA-17048
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17048
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/SSTable
> Reporter: Jacek Lewandowski
> Assignee: Jacek Lewandowski
> Priority: Normal
> Fix For: 4.1
>
>
> Replace the current sequential sstable generation identifier with ULID based.
> ULID is better because we do not need to scan the existing files to pick the
> starting number as well as we can generate globally unique identifiers.
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