flashcache and solr/lucene

[dan sutton <da...@gmail.com>]

Hi,

Just wondering if anyone had any experience with solr and flashcache
[https://wiki.archlinux.org/index.php/Flashcache], my guess it might
be particularly useful for indicies not changing that often, and for
large indicies where an SSD of that size is prohibitive.

Cheers,
Dan

Re: flashcache and solr/lucene

[Robert Stewart <bs...@gmail.com>]

Any segment files on SSD will be faster in cases where the file is not
in OS cache.  If you have enough RAM a lot of index segment files will
end up in OS system cache so it wont have to go to disk anyway.  Since
most indexes are bigger than RAM an SSD helps a lot.  But if index is
much larger than SSD using something like "flashcache" might not be
much help because most of the segment files are accessed on every
search.  IMO it is better to distribute large indexes across many
machines once the index is much larger than available system cache
RAM.  You can do this with SOLR cloud and use distributed search
across the shards.

On Thu, Mar 1, 2012 at 7:16 AM, dan sutton <da...@gmail.com> wrote:
> Hi,
>
> Just wondering if anyone had any experience with solr and flashcache
> [https://wiki.archlinux.org/index.php/Flashcache], my guess it might
> be particularly useful for indicies not changing that often, and for
> large indicies where an SSD of that size is prohibitive.
>
> Cheers,
> Dan