[erlang-questions] [ANN] cowdb 0.1.0 released

[Benoit Chesneau]

On Sun, Jun 22, 2014 at 6:27 PM, Alexander Alexeev <mail@REDACTED> wrote:

> Looks great!
>
> I wonder,
>
> 1. Are there any limits on number of keys, database size, etc?
>

Only OS limits apply. The number of  keys and the size of a database file
are not limited.



> 2. What made you create your own database engine? Is it something wrong
> with HanoiDB?
>

I wanted a simple index storage on top of the couchdb btree. It's not the
faster one but it proved to be robust along the years. The btree code by
itself exist as a standalone library:

https://bitbucket.org/refugeio/cbt

It already contains some optimizations compared to the version in use in
apache couchdb.

Cowdb by itself will be one of indexed storage used in one another project
I expect to release in july. A new version of cowdb will be out at the end
of the week. I still consider the usage of hanoidb as another storage, but
I am a little worried about its lack of support (or apparent lack of
support). I asked many time about its status and none answered. Someone
told me it was not that stable but I did't try it hard enough myself to
confirm or not.

I hope i answered to your concerns.

- benoit


>
> On Wed, 18 Jun 2014 00:14:15 +0200
> Benoit Chesneau <bchesneau@REDACTED> wrote:
>
> > I just released the version 0.2.0 which add unit-testing and contains
> > some fixes:
> >
> >
> https://wiki.refuge.io/display/COWDB/Changelog#Changelog-0.2.0-2014/06/17
> >
> > Enjoy!
> >
> > - benoit
> >
> >
> > On Tue, Jun 17, 2014 at 1:04 AM, Benoit Chesneau <bchesneau@REDACTED>
> > wrote:
> >
> > > Hi all,
> > >
> > > I presented it rapidly during the EUC and it took some time to
> > > finish some feature but here the first release of cowdb:
> > >
> > > http://cowdb.org
> > >
> > > Cowdb implements an indexed, key/value storage engine in #Erlang.
> > > The primary index is an append-only btree implemented using CBT a
> > > btree library extracted from Apache #CouchDB.
> > >
> > > Main features are:
> > >
> > > - Append-Only b-tree using COW
> > > - Read/Write can happen independently
> > > - Put/Get/Delete/Fold operations
> > > - support transactions with transaction functions
> > > - Transaction log
> > > - Snapshotting support
> > > - Automatic compaction
> > >
> > > Enjoy!
> > >
> > > - benoit
> > >
>
>
>
> --
> Best regards,
> Alexander Alexeev
> http://eax.me/
>
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