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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4545) add cql support for batchlog
Date Mon, 24 Sep 2012 16:01:07 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13461874#comment-13461874
] 

Jonathan Ellis commented on CASSANDRA-4545:
-------------------------------------------

I think I would favor {{BEGIN BATCH}} for atomic and {{BEGIN UNLOGGED BATCH}} otherwise. 
Reasoning:

# I'm pessimistic that people will (a) understand the {{ATOMIC|NONATOMIC}} distinction without
(b) being needlessly scared.  Doing the "right" thing by default means we don't have to inflict
a decision on new users that they're not yet qualified to make.
# Secondarily, this is a gentler "breaking" of your code (for hypothetical cql3 1.1 users)
vs making {{BEGIN BATCH}} not work without a qualifier.  If someone upgrading from cql3 in
1.1 notices the slowdown (or reads NEWS) they can switch to {{UNLOGGED}} if they want.  Granted,
we explicitly said cql3 in 1.1 is beta, but if we can avoid breaking things, so much the better.

I don't have a good answer for the "someone could compare Thrift {{batch_mutate}} with 1.2
{{BEGIN BATCH}} without noticing that it really corresponds to {{atomic_batch_mutate}}" concern,
other than that I'm willing to live with that price.
                
> add cql support for batchlog
> ----------------------------
>
>                 Key: CASSANDRA-4545
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4545
>             Project: Cassandra
>          Issue Type: Sub-task
>            Reporter: Jonathan Ellis
>            Assignee: Aleksey Yeschenko
>
> Need to expose the equivalent of atomic_batch_mutate (CASSANDRA-4542) to CQL3.

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