Ceph is a free software storage platform designed to present object, block, and file storage from a single distributed computer cluster.

learn more… | top users | synonyms

1
vote
1answer
95 views

Ceph OSD always 'down' in Ubuntu 14.04.1

I am trying to install and deploy a ceph cluster. As I don't have enough physical servers, I create 4 VMs on my OpenStack using official Ubuntu 14.04 image. I want to deploy a cluster with 1 monitor ...
0
votes
2answers
190 views

Unable to add initial monitor to Ceph in Ubuntu

I am trying to set up a Ceph cluster. I have 4 nodes - 1 admin-node, 1 monitor and 2 object storage devices. The installation guide I am using is given at the following location: ...
0
votes
0answers
87 views

Conditions for “mds cluster is degraded”

I see into Ceph and after running command $ ceph status I meet text "mds cluster is degraded". I try to seek it at official Ceph docs, but nothing find. If I understand correctly, MDS needed for ...
0
votes
1answer
35 views

Simple scheme for backup virtual machine, which drawback of simple DD?

We've been struggling to create the consistent scheme for backup of KVM virtual machines under Proxmox control and Ceph as storage, but still quite often during the vzdump with a snapshot the virtual ...
11
votes
1answer
528 views

Cause of page fragmentation on “large” server with xfs, 20 disks and Ceph

Any insight from someone with a bit of experience in the linux IO system would be helpful. Here is my story: Recently brought up a cluster of six Dell PowerEdge rx720xds to serve files via Ceph. ...
0
votes
0answers
278 views

Why is GlusterFS so slow here?

We've set up a mirroring pair of GlusterFS servers. No special tuning, whatever came "out of the box" with GlusterFS-3.5.1 in the official RHEL6 RPM, that's what we have. The cluster works, but the ...
-2
votes
1answer
106 views

What's the best way to sync folders across 03 or more webservers? [closed]

I have 03 servers and I want to sync some folders across them. I'm using DRBD + OCFS2 for a year or so, but it doesn't support more than 02 servers right now. I read about GlusterFS and CEPH, but ...
1
vote
1answer
777 views

DELL FS12-SC PERC 6/i replacement with JBOD support? [closed]

I have 3 DELL FS12-SC servers with a bunch of 3TB drives (issue number 1, the perc 6/i doesn't appear to support 3TB drives). I'm setting up a ceph cluster and need to run the drives in JBOD mode. The ...
3
votes
1answer
146 views

How can I measure complex I/O activity to develop realistic benchmarking? [closed]

I need to retrieve a few metric from my service server to benchmark another stroage solution. There are various options are provied by benchmark program(I choosed ...
4
votes
1answer
874 views

Which iscsi target on linux for serving vSphere? [closed]

All such questions are a bit dated; I'm hoping things have changed in the past year. What do you guys use to serve a DRS cluster with vSphere 5.1/5.5? SCSI-3 persistent reservation support would be ...
0
votes
2answers
291 views

Scale-out distributed storage with snapshots

I'm aware there are many similar questions around, several with great answers. I still haven't quite found what I'm looking for though: a distributed, scale-out FS that supports snapshots. Gluster ...
0
votes
3answers
151 views

File system benchmark that generates I/O from distribution of file sizes [closed]

I am looking for a file system benchmarking tool to test CephFS. This benchmarking tool has to: Generate a set of files (call it fileset) following a particular distribution, e.g., gamma, empirical, ...
1
vote
1answer
2k views

How do I mount an rbd device from fstab

According to this link: http://ceph.com/docs/next/start/quick-rbd/ I can mount an rbd, which works perfectly. The question I have is, how do I do this from fstab. The end goal being to mount it to ...
2
votes
1answer
235 views

What kind of “volume/storage management” has the largest support/feature set these days? [closed]

(DISCLAIMER: This is "time bound" as probably every other question, I just point it out now instead of implicating it) part of reviewing a few basic decisions for our infrastructure is once again the ...
0
votes
2answers
556 views

how to use ceph in a backup environment

I want to pool a large number of hard drives over the network to provide a large backup space. I want also to partition this space and make it available to several machines as a backup space. I ...
1
vote
3answers
1k views

How to mount ceph-fuse automatically with fstab?

# ceph -v ceph version 0.56.3 (6eb7e15a4783b122e9b0c85ea9ba064145958aa5) # repoquery -i ceph Name : ceph Version : 0.56.3 Release : 1.el6 Architecture: x86_64 Size : 26734691 ...
0
votes
1answer
899 views

copy kvm image from ceph to other storage

A while ago I created a ceph storage cluster and connected it to proxmox2 according to the method described in http://pve.proxmox.com/wiki/Storage:_Ceph. We have some kvm images running on the ceph ...
2
votes
1answer
1k views

Object storage: when to choose OpenStack (Swift) vs. Ceph

Swift (OpenStack) and Ceph are both open source projects that implement object storage. What are the factors to consider when trying to decide which one to deploy? Under what scenarios would you ...
3
votes
3answers
683 views

Does it work to run mysql with the data directory on a CephFS mount?

We have a database cluster that uses MySQL on DRBD with Pacemaker+Corosync, which is great. My question is whether it is possible (and whether anyone has been successful) to mount a CephFS drive to ...
-2
votes
1answer
738 views

How exactly are Distributed File Systems used in cloud environment? [closed]

How exactly are Distributed File Systems used in cloud environment ? More precisely: Are live VMs images (or their filesystem) usually located in the DFS ? Are VMs usually used to run the backbone ...