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Posted to dev@cassandra.apache.org by Rajath Subramanyam <ra...@gmail.com> on 2016/06/28 01:10:43 UTC
SSTable generation numbers
Hello Cassandra-dev,
Are there any scenarios in which the generation numbers of SSTables (i.e.
ksname-cfname-<gen_num>-Data.db) can wrap around, without the admin
dropping and re-creating the CF with the same name ?
I believe that the answer must be version-agnostic, but in case it matters,
I am specifically asking this question for C* 2.0/2.1.
Thanks in advance for your help.
- Rajath
------------------------
Rajath Subramanyam
Re: SSTable generation numbers
Posted by Rajath Subramanyam <ra...@gmail.com>.
Thanks Tyler.
- Rajath
------------------------
Rajath Subramanyam
On Tue, Jun 28, 2016 at 11:01 AM, Tyler Hobbs <ty...@datastax.com> wrote:
> 32 bit integer overflow is the only scenario where a single node would wrap
> around.
>
> However, when copying sstables from one node to another, there can easily
> be conflicts, so this is something to be careful about.
>
> On Mon, Jun 27, 2016 at 8:10 PM, Rajath Subramanyam <ra...@gmail.com>
> wrote:
>
> > Hello Cassandra-dev,
> >
> > Are there any scenarios in which the generation numbers of SSTables (i.e.
> > ksname-cfname-<gen_num>-Data.db) can wrap around, without the admin
> > dropping and re-creating the CF with the same name ?
> >
> > I believe that the answer must be version-agnostic, but in case it
> matters,
> > I am specifically asking this question for C* 2.0/2.1.
> >
> > Thanks in advance for your help.
> >
> > - Rajath
> > ------------------------
> > Rajath Subramanyam
> >
>
>
>
> --
> Tyler Hobbs
> DataStax <http://datastax.com/>
>
Re: SSTable generation numbers
Posted by Tyler Hobbs <ty...@datastax.com>.
32 bit integer overflow is the only scenario where a single node would wrap
around.
However, when copying sstables from one node to another, there can easily
be conflicts, so this is something to be careful about.
On Mon, Jun 27, 2016 at 8:10 PM, Rajath Subramanyam <ra...@gmail.com>
wrote:
> Hello Cassandra-dev,
>
> Are there any scenarios in which the generation numbers of SSTables (i.e.
> ksname-cfname-<gen_num>-Data.db) can wrap around, without the admin
> dropping and re-creating the CF with the same name ?
>
> I believe that the answer must be version-agnostic, but in case it matters,
> I am specifically asking this question for C* 2.0/2.1.
>
> Thanks in advance for your help.
>
> - Rajath
> ------------------------
> Rajath Subramanyam
>
--
Tyler Hobbs
DataStax <http://datastax.com/>