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Re: deleting 2TB lots of files with delaylog: sync helps?

To: xfs@xxxxxxxxxxx
Subject: Re: deleting 2TB lots of files with delaylog: sync helps?
From: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>
Date: Tue, 31 Aug 2010 22:01:47 -0500
In-reply-to: <20100901000631.GO705@dastard>
References: <201009010130.41500@xxxxxx> <20100901000631.GO705@dastard>
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.8) Gecko/20100802 Thunderbird/3.1.2
Dave Chinner put forth on 8/31/2010 7:06 PM:

> You're probably CPU bound, not IO bound.

7200 rpm is the highest spindle speed for 2TB drives--5400 is most
common.  None of them are going to do much over 200 random seeks/second,
if that.  That's 400 tops for two drives.

Using any modern Intel/AMD ~2 GHz CPU, you think he's CPU bound?
Apparently this "rm -rf" type operation is much more complex than I
previously believed.

-- 
Stan

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