[ceph-users] New to ceph - error running create-initial

Hi I've recently started working with ceph for a university project I have. I'm working on Amazon EC2 servers. I've used 4 instances: one is admin/mon + 3 OSDs. Right from the start I've encountered a problem. When running the following command: ceph-deploy --username ubuntu mon create-initial I'

Re: [ceph-users] New to ceph - error running create-initial

; workaround 1) > before mon create-initial just run 'ceph-deploy admin mon-node' to push > the admin key on mon nodes and then rerun mon create-initial > > 2) or use jewel build which is stable and if you dont need latest master > ceph-deploy install --stable=jewel nod

[ceph-users] First time deploying ceph on Amazon EC2

Hi I'm first time deploying ceph. I've tried various manuals and read the ceph documentation, but I keep failing on the same issue during create-initial. For example, I've used this manual: https://github.com/infn-bari-school/cloud-storage-tutorials/wiki/Ceph-cluster-installation-(jewel-on-Ubuntu-x

[ceph-users] Replication (k=1) in LRC

Hi, I'm working on various implementation of LRC codes for study purposes. The layers implementation in the LRC module is very convenient for this, but I've came upon a problem in one of the cases. I'm interested in having k=1, m=1 in one of the layers. However this gives out an error: Error EINVAL

Re: [ceph-users] Replication (k=1) in LRC

7;[ [ "DD_DD_c_", "" ], [ "DDc_", "" ], [ "___DDc__", "" ], [ "__Dc", "" ], ]' \ ruleset-steps='[ [ "chooseleaf", "osd", 8 ], ]' Regards, Oleg On Fri, Apr 28, 2017 at 12:33 AM, Loic Da

Re: [ceph-users] Replication (k=1) in LRC

Hi Loic Commenting out the sanity check did the trick. The code is working as I'd expected. Thanks On Fri, Apr 28, 2017 at 1:48 AM, Loic Dachary wrote: > > > On 04/27/2017 11:43 PM, Oleg Kolosov wrote: > > Hi Loic, > > Of course. > > I'm implementing a ve

[ceph-users] RS vs LRC - abnormal results

Hi, I'm comparing different configurations of LRC with Reed-Solomon. Specifically I'm comparing the total data read in all OSDs during a reconstruction of a single node (I drop a single OSD and measure until the system is stable again). While most of the configurations output the desired result, a

[ceph-users] Redundant reallocation of OSD in a Placement Group

Hi Analyzing a single node crash in a PG, I've noticed that CRUSH might allocate an OSD which already exists in the PG to replace the failed OSD. For Example, say this is how the PG is allocated: [1,2,3,4] And say node 1 crashed, the initial allocation can be [2,2,3,4], meaning 2 was assigned inst

[ceph-users] Non efficient implementation of LRC?

Hi In minimum_to_decode function of ErasureCodeLrc.c , I suspect non efficient implementation. More specifically, instead of reading the minimum, we read the maximum. The problem is in this case: // // Get all available chunks in that layer to recover the // missing one(s). // set_difference(i

[ceph-users] Editing Ceph source code and debugging

Hi I'm interested in writing an original erasure code in Ceph for my research purposes. I was wondering if there is any tool or method supporting quick compilation and debugging. Thanks ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.c