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From "Jonathan Ellis (JIRA)" <>
Subject [jira] Commented: (CASSANDRA-336) Merge batchmutation types and support batched deletes
Date Thu, 17 Dec 2009 19:06:18 GMT


Jonathan Ellis commented on CASSANDRA-336:

the approach looks good in general and the refactoring was well done.  (but please, don't
break lines when they are nowhere near our convention of 120 columns! :)

one thing that needs to be fixed is, the Deletion struct here and in CASSANDRA-293 (which
just got a patch) need to be the same.  If we have two different ones I guarantee one will
need to be deprecated in the future, so let's save ourselves that trouble.  And, since 293
adds support for range deletes to RowMutation, supporting that too should be pretty easy.

> Merge batchmutation types and support batched deletes
> -----------------------------------------------------
>                 Key: CASSANDRA-336
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 0.5
>            Reporter: Evan Weaver
>            Assignee: Tim Huske
>             Fix For: 0.9
>         Attachments: 336-thrift.patch, CASSANDRA-336-code.diff, CASSANDRA-336-thrift.diff,
CASSANDRA-336-v2-Adding-support-for-batch-mutations.patch, v1-0001-CASSANDRA-336.-Thrift-definition-for-batch_mutate.patch
> I need all possible mutations to be able to be bundled into a generic batchMutation,
and sent as one operation.
> In the absence of database constraints, this gives you all the benefits of transactions
with none of the implementation pain. All I care about is whether a bundle of updates reaches
the server atomically, mitigating issues with unreliable client VMs, and allowing the client
to "roll back" a set of operations by merely discarding the batch.

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