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Erick Erickson |
at Apr 18, 2008 at 2:05 pm
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⇧ | 
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They'll be in synch forever unless and until you *change* the index. Once
you do anything with an IndexWriter, you have to be very careful about
relying on doc IDs.
But remember that opening a searcher takes a snapshot of the index and
that reader/searcher will NOT see changes. So you could think about
building your cache and using it *as long as you haven't closed/reopened
your index reader*. The cache and search will be in synch for that interval.
Best
Erick
On Fri, Apr 18, 2008 at 9:14 AM, Shailendra Mudgal wrote:Hi Erik Thanks for you prompt reply.
So if i refresh the searcher in every one hour and that time itself if i
refresh this cache also, is this going to work? I mean will the document
ids
will be in sync for that one hour.
On Fri, Apr 18, 2008 at 2:02 AM, Erick Erickson wrote:Doc IDs are NOT permanent. If you don't change your index at all
(delete especially, but sometimes adding/optimizing can chage IDs)
then you can re-use them. Otherwise not.
On Thu, Apr 17, 2008 at 1:45 PM, Shailendra Mudgal <
[email protected]> wrote:
Hi All,
I have a small confusion regarding the document ids which we collect using
HitCollector.collect() method. Here is the description of the
confusion
:
First i created a FieldCache of type <docID, <list of companyIDs>>
using
a
query which collects all the articles which are only a month old. I am
storing them into a map.
So now my cache has same document id 's associated with their field value
ready in the memory.
Now suppose for a search which has duration less then a month, i get a
list
of docIds using hit collector. Can i map these document ids to the
map,
which i created earlier. And use those field values???
Any help will be appreciated ....
Regards,
Shailendra
