Re: cephfs and erasure coding

[Rhian Resnick <rresnick@xxxxxxx>]

Thanks for the confirmations of what is possible. 

We plan on creating a new file system, rsync and delete the old one. 

Rhian

On Mar 9, 2017 2:27 AM, Maxime Guyot <Maxime.Guyot@xxxxxxxxx> wrote:

Hi,

 

>“The answer as to how to move an existing cephfs pool from replication to erasure coding (and vice versa) is to create the new pool and rsync your data between them.”

Shouldn’t it be possible to just do the “ceph osd tier add  ecpool cachepool && ceph osd tier cache-mode cachepool writeback” and let Ceph redirect the requests (CephFS or other) to the cache pool?

 

Cheers,

Maxime

 

From: ceph-users <ceph-users-bounces@xxxxxxxxxxxxxx> on behalf of David Turner <david.turner@xxxxxxxxxxxxxxxx>
Date: Wednesday 8 March 2017 22:27
To: Rhian Resnick <rresnick@xxxxxxx>, "ceph-users@xxxxxxxx" <ceph-users@xxxxxxxx>
Subject: Re: [ceph-users] cephfs and erasure coding

 

I use CephFS on erasure coding at home using a cache tier.  It works fine for my use case, but we know nothing about your use case to know if it will work well for you.

The answer as to how to move an existing cephfs pool from replication to erasure coding (and vice versa) is to create the new pool and rsync your data between them.

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David Turner | Cloud Operations Engineer | StorageCraft Technology Corporation 380 Data Drive Suite 300 | Draper | Utah | 84020 Office: 801.871.2760 | Mobile: 385.224.2943

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From: ceph-users [ceph-users-bounces@xxxxxxxxxxxxxx] on behalf of Rhian Resnick [rresnick@xxxxxxx]
Sent: Wednesday, March 08, 2017 12:54 PM
To: ceph-users@xxxxxxxx
Subject: [ceph-users] cephfs and erasure coding

Two questions on Cephfs and erasure coding that Google couldn't answer.

 

 

1) How well does cephfs work with erasure coding?

 

2) How would you move an existing cephfs pool that uses replication to erasure coding?

 

Rhian Resnick

Assistant Director Middleware and HPC

Office of Information Technology

 

Florida Atlantic University

777 Glades Road, CM22, Rm 173B

Boca Raton, FL 33431

Phone 561.297.2647

Fax 561.297.0222

 

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