21, 2008 10:59 AM
To: solr-user@lucene.apache.org
Subject: Re: shards and performance
2008/8/21 Otis Gospodnetic <[EMAIL PROTECTED]>
> Uh uh. 6 instances per node all pointing to the same index?
> Yes, this can increase performance, but only because it essentially
> gives
olr-user@lucene.apache.org
> > Sent: Wednesday, August 20, 2008 9:49:04 AM
> > Subject: Re: shards and performance
> >
> > Another thing to consider on your sharding is the access rate you want to
> > guarantee.
> >
> > In the project I am working, I need to g
gust 20, 2008 9:49:04 AM
> Subject: Re: shards and performance
>
> Another thing to consider on your sharding is the access rate you want to
> guarantee.
>
> In the project I am working, I need to guarantee at least 200hits/second
> with various facets in all queries.
>
2008/8/20 Ian Connor <[EMAIL PROTECTED]>
> So, because the OS is doing the caching in RAM. It means I could have
> 6 jetty servers per machine all pointing to the same data. Once the
> index is built, I can load up some more servers on different ports and
> it will boost performance.
>
> That does
So, because the OS is doing the caching in RAM. It means I could have
6 jetty servers per machine all pointing to the same data. Once the
index is built, I can load up some more servers on different ports and
it will boost performance.
That does sound promising - thanks for the tip. What made you
Another thing to consider on your sharding is the access rate you want to
guarantee.
In the project I am working, I need to guarantee at least 200hits/second
with various facets in all queries.
I am not using sharding, but I have 6 Solr instances per cluster node, and I
have 3 nodes, to a total o
I have based my machines on bare bones servers (I call them ghetto
servers). I essentially have motherboards in a rack sitting on
catering trays (heat resistance is key).
http://web.mac.com/iconnor/iWeb/Site/ghetto-servers.html
Motherboards: GIGABYTE GA-G33M-S2L (these are small mATX with 4 RAM
s
As long as Solr/Lucene makes smart use from memory (and they from my
experiences), it is really easy to calculate how long a huge query/update
will take when you know how much the smaller ones will take. Just keep in
mind that the resource consumption of memory and disk space is almost always
propo
On 19-Aug-08, at 12:58 PM, Phillip Farber wrote:
So you experience differs from Mike's. Obviously it's an important
decision as to whether to buy more machines. Can you (or Mike)
weigh in on what factors led to your different take on local shards
vs. shards distributed across machines?
Thanks, Ian, for the considered reply. See below.
Ian Connor wrote:
I have not seen any boost by having an index split into shards on the
same machine. However, when you split it into smaller shards on
different machines (cpu/ram/hdd), the performance boost worth it.
So you experience differs
I have not seen any boost by having an index split into shards on the
same machine. However, when you split it into smaller shards on
different machines (cpu/ram/hdd), the performance boost worth it.
At least for building the index, the number of shards really does
help. To index Medline (1.6e7 do
On 19-Aug-08, at 10:18 AM, Phillip Farber wrote:
I'm trying to understand how splitting a monolithic index into
shards improves query response time. Please tell me if I'm on the
right track here. Were does the increase in performance come
from? Is it that in-memory arrays are smaller
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