-Re: Lucene instead of HFiles?
Renaud Delbru 2012-10-05, 08:48
With respect to point 3, I know there is a new codec in Lucene 4.0 for
append-only filesystem such as hdfs (LUCENE-2373)
Also, it would also depend on the use case. At the moment, for storing
data, I would expect HFile to be much more efficient in term of
compression than Lucene file system (in fact, there is no real
comnpression, apart by compressing yourself the field byte stream before
storing it). There is some work to try to make Lucene more efficient for
small and medium sized fields (LUCENE-4226 - block-style compression and
storing), but I think HFile is far more optimised for this task.
In fact, another interesting idea would be to investigate the use of
HFile as a StoredFieldFormat in Lucene. Efficient storage of data in
Lucene is imho quite a missing feature.
On 05/10/12 07:36, Adrien Mogenet wrote:
> "Don't bother trying this in production" ;-)
> 1. Are you sure lookup by key are faster ?
> 2. Updating Lucene files in a lock-free maneer and ensuring good
> concurrency can be a bit tricky
> 3. AFAIK, Lucene files don't fit in HDFS and thus another distributed
> storage is required. Katta does not look as powerful as Hadoop.
> On Fri, Oct 5, 2012 at 5:34 AM, Otis Gospodnetic
> <[EMAIL PROTECTED]> wrote:
>> Has anyone attempted using Lucene instead of HFiles (see
>> https://twitter.com/otisg/status/254047978174701568 )?
>> Is that a completely crazy, bad, would-never-work,
>> don't-bother-trying-this-at-home, it's-too-late-go-to-sleep idea? Or
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