Hi Ben, Thanks for this, much appreciated. Can I just check: Do you use ceph-deploy to create your OSDs? E.g.: ceph-deploy disk zap ceph-sn1.example.com:/dev/mapper/disk1 ceph-deploy osd prepare ceph-sn1.example.com:/dev/mapper/disk1 Best wishes, Bruno -----Original Message----- From: Benjeman Meekhof [mailto:bmeekhof@xxxxxxxxx] Sent: 11 July 2017 18:46 To: Canning, Bruno (STFC,RAL,SC) Cc: ceph-users Subject: Re: Multipath configuration for Ceph storage nodes Hi Bruno, We have similar types of nodes and minimal configuration is required (RHEL7-derived OS). Install device-mapper-multipath or equivalent package, configure /etc/multipath.conf and enable 'multipathd'. If working correctly the command 'multipath -ll' should output multipath devices and component devices on all paths. For reference, our /etc/multipath.conf is just these few lines: defaults { user_friendly_names yes find_multipaths yes } thanks, Ben On Tue, Jul 11, 2017 at 10:48 AM, <bruno.canning@xxxxxxxxxx> wrote: > Hi All, > > > > I’d like to know if anyone has any experience of configuring multipath > on ceph storage nodes, please. I’d like to know how best to go about it. > > > > We have a number of Dell PowerEdge R630 servers, each of which are > fitted with two SAS 12G HBA cards and each of which have two > associated Dell MD1400 storage units connected to them via HD-Mini - > HD-Mini cables, see the attached graphic (ignore colours: two direct > connections from the server to each storage unit, two connections running between each storage unit). > > > > Best wishes, > > Bruno > > > > > > Bruno Canning > > LHC Data Store System Administrator > > Scientific Computing Department > > STFC Rutherford Appleton Laboratory > > Harwell Oxford > > Didcot > > OX11 0QX > > Tel. +44 ((0)1235) 446621 > > > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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