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Questions tagged [ceph]

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

Ceph is a free software storage platform designed to present object, block, and file storage from a single distributed computer cluster. Ceph's main goals are to be completely distributed without a single point of failure, scalable to the exabyte level, and freely-available.

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How to add Hetzner Cloud Disk Volume to extend /var partition?

I have a new Hetzner cloud server and added an extra 50GB disk volume (CEPH) to my server. The default disk is only 40GB. I thought it would be added to the default storage like the traditional servers but now I have two disks. I would appreciate if…
eArmin
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Ceph architecture for small HPC cluster

I want to build Ceph Storage Cluster for HPC use. (CentOS 7 based) For now I have enterprise SAS RAID enclosure with 3 shelves by 12 4TB disks(36 total). Now it is configured as default RAID6 rig. And it's performance is very bad. Also I can't scale…
Severgun
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openstack instance's image name lost after integration with ceph rbd

after integrated with ceph rbd,my openstack could not show "image name" of my instance, is there any option that controlling this feature?
mrco
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Tried to recover a Ext4 Superblock to a CEPH disk

We have a server with Proxmox installed with Debian, it's an dedicated server (sda). The VM's are being backed up every night on a CEPH disk (sdb). After an reboot of the dedicated, the ext4 drive from the dedicated server had a broken…
Roy Zon
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Slow samba write speed to ceph backend

I have backend on cephfs cluster, mounted on gateway. Mount path is shared with samba 4.7.4. But my speed is low, about 1,5MB/s with small files (1k - 100k). I copy ot with win server 2008 client. Locally i copy the same files 5-6 times faster. So i…
Ivan Alex
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RAID-0 stripe size for Ceph OSD

I have 3 servers that I will use for a new Ceph cluster. It's my first Ceph "playground"... Each server has 2x1TB and 6x2TB HDDs connected to two separate 4-channel SAS controllers, each with 1GB cache + BBU, so I plan to optimize those for…
Jacket
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Ceph is full but disk is almost empty

I have a ceph cluster with 2 nodes and 3 osd's each. Each osd is on one partion on a 8TB disk. The server is limited in amount of disk so I even have system on the same disks. On install I used prepare and activate on the partion and everything got…
Johan
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CephFS needed if you only need block storage?

I'm looking into building a CEPH cluster as a storage solution for our proxmox cluster. It's unclear to me if I need to set up a metadata server too, because this is needed for CephFS but I think CephFS is not used for RBD, correct?
Maarten Ureel
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Proxmox Ceph OSD Fault

I am running Proxmox with 2 nodes and Ceph. Recently I had a drive die and replaced it. In the process of trying to initialize it as an OSD, all I get are fault errors: 2017-07-31 15:05:05.278499 7fe2ac319700 0 -- :/2194139526 >> 172.18.1.4:6789/0…
ahhchuu
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broken ceph dependency with centos7 and epel

Okay, I'm trying to install ceph, using just "yum install ceph" from the epel repositories. This is what I get: --> Finished Dependency Resolution Error: Package: 1:python-cephfs-0.80.7-0.8.el7.x86_64 (epel) Requires: python-rados =…
Jeroen Jacobs
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Ceph PG's stuck creating / Pool creation slow

I've created a small ceph cluster 3 servers each with 5 disks for osd's with one monitor per server. The actual setup seems to have gone OK and the mons are in quorum and all 15 osd's are up and in however when creating a pool the pg's keep getting…
Dave
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Using NFS Mounts as Long Term Container Storage

this is more of a question of best practice than anything. I currently have a proxmox clustered deployment of three servers, all accessing a ceph cluster (that is self hosted on the same servers). The ceph cluster has two main pools, instances…
MineSQL
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Can VM hard disk size be bigger than single SSD in Ceph Storage?

I have a 3 node ceph proxmox cluster for storage with node1 7*143GB ssds, node2 7*143 ssds, node3 7*218 ssds. Now I have read through the http://docs.ceph.com/docs/jewel/architecture/#mapping-pgs-to-osds however it is not 100% clear to me if I can…
fcukinyahoo
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Deleting files in Ceph does not free up space

I am using Ceph, uploading many files through radosgw. After, I want to delete the files. I am trying to do that in Python, like this: bucket = conn.get_bucket(BUCKET) for key in bucket.list(): bucket.delete_key(key) Afterwards, I use…
Turtle V. Rabbit
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Ceph Pool Snapshot for CephFS Backup and/or Data Recovery

Since CephFS does not support snapshot yet, could we use Ceph Pool Snapshot for backup purpose from accidental deletion of files inside CephFS? ceph osd pool mksnap {pool-name} {snap-name} ceph osd pool rmsnap {pool-name} {snap-name} rados -p…
chrone
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