Hi
Apologies......
Can somebody provide me Approximate answers [ Which is Better choice ]
A search of 10,000 subindexes using multisearcher
or
a search on One Single Merged Index [ merged 10,000 Sub indexes ]
a) SubIndexes 10,000 ( < future)
b) Field to be searche upon = 4
c)Field type present in Indexed format = 15
d) RAM = 1GB
e) O/s Linux [ Clustered Enviournament]
f) Processor make AMD [Probably High End]
g) WebServer Tomcat 5.0.x
1)Which would be Faster ???;
2)If not What is may be the Probable Solution.
Karthik
-----Original Message-----
From: Erik Hatcher [mailto:[EMAIL PROTECTED]
Sent: Wednesday, October 13, 2004 3:53 PM
To: Lucene Users List
Subject: Re: Multi + Parallel
On Oct 13, 2004, at 3:14 AM, Karthik N S wrote:
> I was Curious to Know the Difference between ParallelMultiSearcher and
> MultiSearcher ,
>
> 1) Is the working internal functionality of these are same or
> different .
They are different internally. Externally they should return identical
results and not appear different at all.
Internally, ParallelMultiSearcher searches each index in a separate
thread (searches wait until all threads finish before returning). In
MultiSearcher, each index is searched serially.
You will not likely see a benefit to using ParallelMultiSearcher unless
your environment is specialized to accommodate multi-threading
(multiple CPU's, indexes on separate drives that can operate
independently, etc).
> 2) In terms of time domain do these differ when searching same no of
> fields
> / words .
>
> 3)What are the features used on each of API.
There is no external difference to using either implementation.
Benchmark searches using both and see what is best, but generally
MultiSeacher will be better in most environments as it avoids the
overhead of starting up and managing multiple threads.
Erik
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