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From "scott chu" <>
Subject Re: Hardware Specs Question
Date Fri, 03 Sep 2010 15:40:21 GMT
well balanced system
Agree. Here we'll start a performance & load test this month. I've defined a 
test criteria of 'qps', 'RTpQ' & worse case according to our use case & past 
experience. Our goal is pursuing this criteria & adjust hardware & system 
configuration to find a well balanced scalable Solr aritecture.

However, the past discussion of this thread has several good suggestion for 
our test. Thanks to all who provides their experience & suggestion.


----- Original Message ----- 
From: "Toke Eskildsen" <>
To: <>
Sent: Friday, September 03, 2010 6:43 PM
Subject: Re: Hardware Specs Question

> On Fri, 2010-09-03 at 11:07 +0200, Dennis Gearon wrote:
>> If you really want to see performance, try external DRAM disks.
>> Whew! 800X faster than a disk.
> As sexy as they are, the DRAM drives does not buy much more extra
> performance. At least not at the search stage. For searching, SSDs are
> not that far from holding the index fully in RAM (about 3/4 the speed in
> our tests but YMMV). The CPU is the bottleneck.
> That was with Lucene 2.4 so the relative numbers might have changed, but
> the old lesson still stands: A well balanced system is key.

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