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Sylvain Lebresne edited comment on CASSANDRA-11721 at 5/6/16 6:30 PM: ---------------------------------------------------------------------- As said above, it's probably not gonna happen too soon, but for the record, if we do got with a DDL syntax, my preference would be to add some {{WITH OPTIONS}} rather than some specific {{NO SNAPSHOT}}. So something like: {noformat} TRUNCATE x WITH OPTIONS = { 'snapshot' : false } {noformat} so that it's somewhat more consistent with other statements and can be easily extended to other options without requiring new syntax every time. was (Author: slebresne): As said above, it's probably not gonna happen too soon, but for the record, if we do got with a DDL syntax, my preference would be to add some {{WITH OPTIONS}} rather than some specific {{NO SNAPSHOT}}. So something like: {{noformat}} TRUNCATE x WITH OPTIONS = { 'snapshot' : false } {{noformat}} so that it's somewhat more consistent with other statements and can be easily extended to other options without requiring new syntax every time. > Have a per operation truncate ddl "no snapshot" option > ------------------------------------------------------ > > Key: CASSANDRA-11721 > URL: https://issues.apache.org/jira/browse/CASSANDRA-11721 > Project: Cassandra > Issue Type: Wish > Components: CQL > Reporter: Jeremy Hanna > Priority: Minor > > Right now with truncate, it will always create a snapshot. That is the right > thing to do most of the time. 'auto_snapshot' exists as an option to disable > that but it is server wide and requires a restart to change. There are data > models, however, that require rotating through a handful of tables and > periodically truncating them. Currently you either have to operate with no > safety net (some actually do this) or manually clear those snapshots out > periodically. Both are less than optimal. > In HDFS, you generally delete something where it goes to the trash. If you > don't want that safety net, you can do something like 'rm -rf -skiptrash > /jeremy/stuff' in one command. > It would be nice to have something in the truncate ddl to skip the snapshot > on a per operation basis. Perhaps 'TRUNCATE solarsystem.earth NO SNAPSHOT'. > This might also be useful in those situations where you're just playing with > data and you don't want something to take a snapshot in a development system. > If that's the case, this would also be useful for the DROP operation, but > that convenience is not the main reason for this option. -- This message was sent by Atlassian JIRA (v6.3.4#6332)