bereng commented on code in PR #2464:
URL: https://github.com/apache/cassandra/pull/2464#discussion_r1271909318
##########
src/java/org/apache/cassandra/db/DeletionTime.java:
##########
@@ -195,42 +195,95 @@ public static Serializer getSerializer(Version version)
return legacySerializer;
}
- // Serializer for Usigned Integer ldt
+ /* Serializer for Usigned Integer ldt
+ *
+ * ldt is encoded as a uint in seconds since unix epoch, it can go up o
2106-02-07T06:28:13+00:00 only.
+ * mfda is a positive timestamp. We use the sign bit to enconde LIVE
DeletionTimes
+ */
public static class Serializer implements ISerializer<DeletionTime>
{
+ // We use the sign bit to signal LIVE DeletionTimes
+ private final static int IS_LIVE_DELETION = 0b1000_0000;
Review Comment:
The `1` in `0b1000_0000` is what marks the presence of LIVE. The rest of the
zeros are not used at all and have no meaning. Makes sense? I am very bad at
explaining things sometimes. Also in the future if we change this it will come
with an sstable format change for compatibility reasons afaik.
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