Re: what means active+clean+scrubbing+deep

[LOPEZ Jean-Charles <jelopez@xxxxxxxxxx>]

Hi Ryan,

it means that the OSDs are physically reading the whole content of the PG, recalculating the checksum of each object to verify that the content of the PG is identical on each OSD protecting the PG. This is to make sure the data that was written to the underlying filesystem of each OSD is identical and hasn't been altered.

So to make it short the OSDs are checking the coherence of the data stored in the PG.

Cheers

JC

On 13 Mar 2015, at 18:53, ryan_hong@xxxxxxxxxxxxxxx wrote:

Hi Jean,

Actually, I want to ask you that what means deep scrubbing? What was ceph doing at that time?

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ryan_hong@xxxxxxxxxxxxxxx

 

From: LOPEZ Jean-Charles

Date: 2015-03-13 15:34

To: ryan_hong@xxxxxxxxxxxxxxx

CC: LOPEZ Jean-Charles; ceph-users

Subject: Re: what means active+clean+scrubbing+deep

Hi Ryan,

 

it means that the PG is in good health (clean), is available (active) and that deep scrubbing is currently being performed  (scrubbing+deep)

 

JC

 

> On 13 Mar 2015, at 17:59, ryan_hong@xxxxxxxxxxxxxxx wrote:

>

> Hi all,

>

> Anyone knows what means 'active+clean+scrubbing+deep' ?

>

> ryan_hong@xxxxxxxxxxxxxxx

> _______________________________________________

> ceph-users mailing list

> ceph-users@xxxxxxxxxxxxxx

> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

 

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