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https://issues.apache.org/jira/browse/CASSANDRA-17048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17431233#comment-17431233
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Benedict Elliott Smith commented on CASSANDRA-17048:
----------------------------------------------------
Thanks.
bq. we cannot use Base64
We can use a custom Base64 that is lexicographic in ASCII (or alternatively
lexicographic in the alphabet by interleaving lowercase and upper case):
{code}
for (int i=0;i<64;i+=8) {
int ch = (v & 0xff);
if (ch < 2) ch = ch == 0 ? '+' : '-';
else if ((ch - = 2) < 10) ch = '0' + ch;
else if ((ch -= 10) < 26) ch = 'A' + ch;
else ch = 'a' + (ch - 26);
builder.append((char)ch);
v >>>= 8;
}
{code}
Or whatever your preferred encoding is.
> 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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