OK, I've spent some time reading the solr/lucene4x classes, and this is
myunderstanding (feel free to correct me ;-))
DirectoryReader holds the opened segments -- each segment has its own
reader, the BaseCompositeReader (or extended classes thereof) store the
offsets per each segment; eg. [0, 5, 2
On Mon, Nov 25, 2013 at 12:54 AM, Mikhail Khludnev <
mkhlud...@griddynamics.com> wrote:
> Roman,
>
> I don't fully understand your question. After segment is flushed it's never
> changed, hence segment-local docids are always the same. Due to merge
> segment can gone, its' docs become new ones in
segments to understand what was going on there, thanks for any
possible pointers
roman
>
> -- Jack Krupansky
>
> -Original Message- From: Erick Erickson
> Sent: Sunday, November 24, 2013 8:31 AM
> To: solr-user@lucene.apache.org
> Subject: Re: building custom
On Sun, Nov 24, 2013 at 8:31 AM, Erick Erickson wrote:
> bq: Do i understand you correctly that when two segmets get merged, the
> docids
> (of the original segments) remain the same?
>
> The original segments are unchanged, segments are _never_ changed after
> they're closed. But they'll be throw
Roman,
I don't fully understand your question. After segment is flushed it's never
changed, hence segment-local docids are always the same. Due to merge
segment can gone, its' docs become new ones in another segment. This is
true for 'global' (Solr-style) docnums, which can flip after merge is
ha
- Jack Krupansky
-Original Message-
From: Erick Erickson
Sent: Sunday, November 24, 2013 8:31 AM
To: solr-user@lucene.apache.org
Subject: Re: building custom cache - using lucene docids
bq: Do i understand you correctly that when two segmets get merged, the
docids
(of the original segme
bq: Do i understand you correctly that when two segmets get merged, the
docids
(of the original segments) remain the same?
The original segments are unchanged, segments are _never_ changed after
they're closed. But they'll be thrown away. Say you have segment1 and
segment2 that get merged into seg
Hi Erick,
Many thanks for the info. An additional question:
Do i understand you correctly that when two segmets get merged, the docids
(of the original segments) remain the same?
(unless, perhaps in situation, they were merged using the last index
segment which was opened for writing and where th
bq: But can I assume
that docids in other segments (other than the last one) will be relatively
stable?
Kinda. Maybe. Maybe not. It depends on how you define "other than the
last one".
The key is that the internal doc IDs may change when segments are
merged. And old segments get merged. Doc IDs w
