Yes - ams5-ssd would have 2 replicas, ams6-ssd would have 1  (@size 3, -2 = 1)

Although for this ruleset the min_size should be set to at least 2, or more 
practically 3 or 4.


From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Sinan 
Polat
Sent: Friday, 25 August 2017 3:02 AM
To: ceph-us...@ceph.com
Subject: [ceph-users] Ruleset vs replica count

Hi,

In a Multi Datacenter Cluster I have the following rulesets:
------------------
rule ams5_ssd {
        ruleset 1
        type replicated
        min_size 1
        max_size 10
        step take ams5-ssd
        step chooseleaf firstn 2 type host
        step emit
        step take ams6-ssd
        step chooseleaf firstn -2 type host
        step emit
}
rule ams6_ssd {
        ruleset 2
        type replicated
        min_size 1
        max_size 10
        step take ams6-ssd
        step chooseleaf firstn 2 type host
        step emit
        step take ams5-ssd
        step chooseleaf firstn -2 type host
        step emit
}
------------------

The replication size is set to 3.

When for example ruleset 1 is used, how is the replication being done? Does it 
store 2 replica's in ams5-ssd and store 1 replica in ams6-ssd? Or does it store 
3 replicas in ams5-ssd and 3 replicas in ams6-ssd?

Thanks!

Sinan
Confidentiality: This email and any attachments are confidential and may be 
subject to copyright, legal or some other professional privilege. They are 
intended solely for the attention and use of the named addressee(s). They may 
only be copied, distributed or disclosed with the consent of the copyright 
owner. If you have received this email by mistake or by breach of the 
confidentiality clause, please notify the sender immediately by return email 
and delete or destroy all copies of the email. Any confidentiality, privilege 
or copyright is not waived or lost because this email has been sent to you by 
mistake.
_______________________________________________
ceph-users mailing list
ceph-users@lists.ceph.com
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

Reply via email to