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https://issues.apache.org/jira/browse/CASSANDRA-17048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17432272#comment-17432272
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Jacek Lewandowski commented on CASSANDRA-17048:
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If we do that we probably do not loose much, in particular, it would look like
this:
{{xxxx_yyyy_zzzzzzzzzzzzzzzzz}}
where:
{{xxxx}} - 4 characters (base 36) denoting a day in the whole timestamp range
{{yyyy}} - 4 characters (base 36) denoting a second of a day (this is going to
be useful part)
{{zzz...}} - 17 characters (base 36) denoting 100-ns + random
as you can see, we still have 25 characters total, and the only thing we need
to add is two separators (underscores as dashes are forbidden)
> 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
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> 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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