From mboxrd@z Thu Jan  1 00:00:00 1970
From: NeilBrown <neilb@suse.de>
Subject: Re: [RFC] md raid resync counter
Date: Sat, 2 Nov 2013 10:48:08 +1100
Message-ID: <20131102104808.47834bdc@notabene.brown>
References: <5273A5BC.5060109@gmail.com>
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To: Jack Wang <xjtuwjp@gmail.com>
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On Fri, 01 Nov 2013 13:59:40 +0100 Jack Wang <xjtuwjp@gmail.com> wrote:

> Hi Neil and all,
>=20
> Is there anyway to know:
>=20
> 1. How often does a raid start to resync?

Look at your logs?

> 2. How many bytes did it resync?

Look at "mismatch_cnt" in sysfs (and multiply by 512).

NeilBrown


>=20
> If not, for the first one, I think we cound add field into mddev like
> resync_counter, increase when resync done, and annother field into
> md_rdev to track how many bytes synced to the outdated disk?
>=20
> Regards,
> Jack


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