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From Ken Sandney <bluefl...@gmail.com>
Subject Re: 0.7 roadmap
Date Wed, 19 May 2010 07:03:48 GMT
Where can I find more details about secondary indexes?

On Wed, May 19, 2010 at 10:07 AM, Jonathan Ellis <jbellis@gmail.com> wrote:

> 0.7 has been coming along at the same time that we've been releasing
> updates for 0.6 (0.6.2 coming soon).
>
> Some things look familiar from our first projected 0.7 roadmap [1] but
> some do not.  (This is why when people ask me what new features
> Cassandra will have in six months, I have trouble answering; even in
> two months plans change.)
>
> Features completed as expected:
>  1. online schema (keyspace + CF) changes
>  2. change row keys from String to byte[]
>  3. truncation support
>  4. expiring column support
>  5. configuration format moved to yaml
>  6. DatacenterShardStrategy finished (with ConsistencyLevel.DCQUORUM
> and DCQUORUMSYNC)
>
> Features that are not yet finished but will probably work out more or
> less as predicted:
>  1. vector clock support
>  2. avro support (note that "as predicted" for avro means "it will be
> alpha/beta-ish," not that it will be a stable api for 0.7)
>  3. support for wide rows (changes row width in the storage format
> from 32bits to 64; reading old-format files will be supported)
>  4. improved JVM defaults for garbage collection
>
> Features that we are re-evaluating for 0.8:
>  1. rewrite of storage engine to support arbitrarily nested columns
>
> Features that we did not originally expect to do in 0.7, but are now
> looking like they will happen:
>  1. secondary indexes
>
> For more detail, you can look at the trunk CHANGES file [2], the jira
> completed-for-0.7 list [3] and the jira pending-for-0.7 list [4].
>
> At this point I think we are 4-6 weeks away from a 0.7 beta.
>
> [1]
> http://www.mail-archive.com/cassandra-dev@incubator.apache.org/msg01512.html
> [2] http://svn.apache.org/repos/asf/cassandra/trunk/CHANGES.txt
> [3]
> https://issues.apache.org/jira/secure/IssueNavigator.jspa?mode=hide&requestId=12314300
> [4]
> https://issues.apache.org/jira/secure/IssueNavigator.jspa?reset=true&mode=hide&sorter/order=DESC&sorter/field=priority&resolution=-1&pid=12310865&fixfor=12314533
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of Riptano, the source for professional Cassandra support
> http://riptano.com
>

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