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From "Burton-West, Tom" <>
Subject RE: MergePolicy Thresholds
Date Mon, 02 May 2011 18:41:14 GMT
Hi Shai and Mike,

Testing the TieredMP on our large indexes has been on my todo list since I read Mikes blog

If you port it to the 3.x branch Shai, I'll be more than happy to test it with our very large
(300GB+) indexes.  Besides being able to set the max merged segment size, I'm especially interested
in using the  maxSegmentsPerTier parameter.

>From Mike's blog post:
" ...maxSegmentsPerTier that lets you set the allowed width (number of segments) of each stair
in the staircase. This is nice because it decouples how many segments to merge at a time from
how wide the staircase can be."

Tom Burton-West

-----Original Message-----
From: Michael McCandless [] 
Sent: Monday, May 02, 2011 2:19 PM
Subject: Re: MergePolicy Thresholds

I think it should be an easy port...


On Mon, May 2, 2011 at 2:16 PM, Shai Erera <> wrote:
> Thanks Mike. I'll take a look at TieredMP. Does it depend on trunk in any
> way, or do you think it can easily be ported to 3x?
> Shai

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