From: Boaz Harrosh <bharrosh@panasas.com>
To: Jim Rees <rees@merit.edu>
Cc: linux-nfs@vger.kernel.org, peter honeyman <honey@citi.umich.edu>
Subject: Re: stripe definitions
Date: Tue, 22 Feb 2011 20:46:06 -0800 [thread overview]
Message-ID: <4D64910E.1030202@panasas.com> (raw)
In-Reply-To: <20110222200558.GC7545@merit.edu>
On 02/22/2011 12:05 PM, Jim Rees wrote:
> There's an inconsistency in rfc5663 that had me a bit confused:
>
> /// struct pnfs_block_stripe_volume_info4 {
> /// length4 bsv_stripe_unit; /* size of stripe in bytes */
>
> The comment "size of stripe in bytes" fits the definition of "stripe width"
> from rfc5661 section 13.2, but that's not what's meant here. The field
> name, "stripe_unit", is correct.
> --
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You are right stripe_unit is the the bytes to write to a single
device before advancing to the next device. The comment is wrong
the "size of stripe in bytes" is stripe_unit * num_of_devices.
The same name used in the OSD and files layout and has the same
meaning.
Cheers
Boaz
prev parent reply other threads:[~2011-02-23 4:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-22 20:05 stripe definitions Jim Rees
2011-02-23 4:46 ` Boaz Harrosh [this message]
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