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From Dikang Gu <dikan...@gmail.com>
Subject Re: [RELEASE] Apache Cassandra 1.0 released
Date Tue, 18 Oct 2011 13:27:37 GMT
Congrats!

In 0.8, the schema disagreement occurs sometimes when I create
keyspaces/column families dynamically, is this also fixed?

Regards.

On Tue, Oct 18, 2011 at 9:20 PM, Jonathan Ellis <jbellis@gmail.com> wrote:

> Short version: yes, 1.0 addresses the known repair problems.
>
> On Tue, Oct 18, 2011 at 7:29 AM, Maxim Potekhin <potekhin@bnl.gov> wrote:
> > There was a problem in early 0.8 where the repair was taking
> > forever -- am I right to assume this was fixed in 1.0?
> >
> > Many thanks to you guys,
> >
> > Maxim
> >
> >
> > On 10/18/2011 2:25 PM, Thibaut Britz wrote:
> >>
> >> Great news!
> >>
> >> Especially the improved read performance and compactions are great!
> >>
> >> Thanks,
> >> Thibaut
> >>
> >>
> >> On Tue, Oct 18, 2011 at 2:11 PM, Jonathan Ellis<jbellis@gmail.com>
>  wrote:
> >>>
> >>> Thanks for the help, everyone!  This is a great milestone for
> Cassandra.
> >>>
> >>> On Tue, Oct 18, 2011 at 7:01 AM, Sylvain Lebresne<sylvain@datastax.com
> >
> >>>  wrote:
> >>>>
> >>>> The Cassandra team is very pleased to announce the release of Apache
> >>>> Cassandra
> >>>> version 1.0.0. Cassandra 1.0.0 is a new major release that build upon
> >>>> the
> >>>> awesomeness of previous versions and adds numerous improvements[1,2],
> >>>> amongst
> >>>> which:
> >>>>  - Compression of on-disk data files (SSTables), with checksummed
> blocks
> >>>> to
> >>>>    protect against bitrot[4].
> >>>>  - Improvements to memory management through off-heap caches, arena
> >>>>    allocation and automatic self-tuning, for less GC pauses and more
> >>>>    predictable performances[5].
> >>>>  - Better disk-space management: better control of the space taken by
> >>>> commit
> >>>>    logs and immediate deletion of obsolete data files.
> >>>>  - New optional leveled compaction strategy with more predictable
> >>>> performance
> >>>>    and fixed sstable size[6].
> >>>>  - Improved hinted handoffs, leading to less need for read repair for
> >>>>    better read performances.
> >>>>  - Lots of improvements to performance[7], CQL, repair, easier
> >>>> operation,
> >>>>    etc[8]...
> >>>>
> >>>> And as is the rule for some time now, rolling upgrades from previous
> >>>> versions
> >>>> are supported, so there is nothing stopping you to get all those
> goodies
> >>>> right
> >>>> now!
> >>>>
> >>>> Both source and binary distributions of Cassandra 1.0.0 can be
> >>>> downloaded at:
> >>>>
> >>>>  http://cassandra.apache.org/download/
> >>>>
> >>>> Or you can use the debian package available from the project APT
> >>>> repository[3]
> >>>> (you will need to use the 10x series).
> >>>>
> >>>> The download page also link to the CQL drivers that, from this release
> >>>> on, are
> >>>> maintained out of tree[9].
> >>>>
> >>>>
> >>>> That's all folks!
> >>>>
> >>>> [1]: http://goo.gl/t3qpw (CHANGES.txt)
> >>>> [2]: http://goo.gl/6t0qN (NEWS.txt)
> >>>> [3]: http://wiki.apache.org/cassandra/DebianPackaging
> >>>> [4]:
> >>>>
> http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-compression
> >>>> [5]:
> >>>>
> http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-improved-memory-and-disk-space-management
> >>>> [6]:
> >>>>
> http://www.datastax.com/dev/blog/leveled-compaction-in-apache-cassandra
> >>>> [7]:
> >>>>
> http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-performance
> >>>> [8]:
> >>>>
> http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-windows-service-new-cql-clients-and-more
> >>>> [9]: http://acunu.com/blogs/eric-evans/cassandra-drivers-released/
> >>>>
> >>>
> >>>
> >>> --
> >>> Jonathan Ellis
> >>> Project Chair, Apache Cassandra
> >>> co-founder of DataStax, the source for professional Cassandra support
> >>> http://www.datastax.com
> >>>
> >
> >
>
>
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com
>



-- 
Dikang Gu

0086 - 18611140205

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