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From: Duncan <1i5t5.duncan@cox.net>
To: linux-btrfs@vger.kernel.org
Subject: Re: Using mount -o bind vs mount -o subvol=vol
Date: Tue, 6 May 2014 17:34:11 +0000 (UTC)	[thread overview]
Message-ID: <pan$db71b$28ae8fc2$4747ca76$c08f8373@cox.net> (raw)
In-Reply-To: 536735FB.6020205@swiftspirit.co.za

Brendan Hide posted on Mon, 05 May 2014 08:55:55 +0200 as excerpted:

> You are 100% right, though. The scale is very small. By negligible, the
> "penalty" is at most a few CPU cycles. When compared to the wait time on
> a spindle, it really doesn't matter much.

The analogy I've used before is that of taking a trip (which the data 
effectively is, between the device and the CPU).

We've booked a 10-day cruise and are now debating what we plan on taking 
to and from the boarding dock.  Will taking the local bus with a couple 
of transfers, or a taxi that will take us there in one trip but there's 
road construction and thus a detour, or a helicopter to fly directly,  
get us back from the cruise faster?

Obviously, taking the helicopter (at least for the return leg) will get 
us back a bit faster, but we're talking perhaps a couple hours difference 
at the end of a 10 day cruise!

=:^)

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman


  reply	other threads:[~2014-05-06 19:42 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-04  0:47 Using mount -o bind vs mount -o subvol=vol Marc MERLIN
2014-05-04  7:07 ` Brendan Hide
2014-05-05  0:56   ` Marc MERLIN
2014-05-05  4:13     ` Brendan Hide
2014-05-05  4:36       ` Roman Mamedov
2014-05-05  6:55         ` Brendan Hide
2014-05-06 17:34           ` Duncan [this message]
2014-05-05  5:22       ` Marc MERLIN
2014-05-05  2:12 ` Duncan
2014-05-07 10:55   ` Marc MERLIN
2014-05-07 12:31     ` Duncan
2014-05-05 13:54 ` Chris Mason

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