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Questions tagged [ceph]

Ceph is a distributed object store and file system designed to provide excellent performance, reliability and scalability.

Ceph is a distributed object store and file system designed to provide excellent performance, reliability and scalability. Ceph is an project primarily developed by Inktank (a spin-off of , now acquired by .

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How to create osd for Ceph on loop device

I'm playing with Ceph in Vagrant environment & trying to create some minimal cluster. I have two nodes: 'master' & 'slave' Master as admin, monitor, manager. Slave for OSD. I'm following the official ceph deploy guides & facing the problem with OSD…
Silk0vsky
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CTDB Samba failover not highly available

My Setup 3 nodes running ceph + cephfs 2 of these nodes running CTDB & Samba 1 client (not one of the 3 servers) It is a Lab setup, so only one nic per server=node, one subnet as well as all Ceph components plus Samba on the same servers. I'm aware,…
Christoph Girstenbrei
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Doubts reqarding CEPH RGW

Well I am new to CEPH and I have some question regarding it? What is default value of rgw_stripe_size and max_chunk_size? What is default size of object stored in Ceph Storage Cluster(I believe it is 4 MB )? Is it dependent on stripe size or chunk…
PrasadB
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Ceph-deploy is not creating ceph.bootstrap-rbd.keyring file

I am learning Ceph storage (luminous) with one admin node and two nodes for OSD and MON etc. as I following the doc http://docs.ceph.com/docs/master/start/quick-ceph-deploy/ to setup my initial storage cluster and stuck after executing this below…
Abdul
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Data 100% unknown after Ceph Update

I updated my dev Ceph cluster yesterday from Jewel to Luminous. Everything was seemingly okay until I ran this command "ceph osd require-osd-release luminous". After that, the data in my cluster is now completely unknown. If I do a detailed view on…
A.Keen
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disk plug cache after first time

I need to develop one feature that likes disk hotplug. I write some udev rules to monitor disk to execute one python script when udev triggered. Question: when I pull the disk first time, lsblk, lsscsi, udev, megacli all can monitor, /dev/sda…
tony yin
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How can I mount a CephFS volume on CoreOS using my monitors' domain name?

I am trying to mount a CephFS volume on CoreOS. It currently works by specifying the IP address of one of my monitors: mount -t ceph 1.2.3.4:6789:/ /mnt However, I have three monitors for redundancy and have configured my DNS server to resolve to…
dippynark
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OpenStack (Swift) or CEPH deduplication feature? or any deduplication HA storage cluster solutions?

For an owncloud (or nextcloud) project we need to add a great amount of storage, I've been checking all options such as: CEPH, Openstack Swift/Cinder, GlusterFS, SDFS and Tahoe-lafs. With this service we expect many of the same files to be added by…
user743919
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Network usage of file open and seek in distributed filesystem like ceph

When I open a file stored in another node in a distributed filesystem and just read the 100 bytes. Does the filesystem try to "prefetch" more data to my node? E.g., The network traffic for sending the file is more than 100 bytes. Another question is…
Helin Wang
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Proxmox ceph dd Speed only 10MB/s

i use Proxmox with ceph and 1Gbit Network. the vm i hvae try virtio/scsi and without cache and Write through. the ceph configuration are standard from proxmox. When the file is bigger then 63MB the speed only 10MB/s the journal in this time is on…
atraxs
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Rogue Ceph OSD not assigned to a host

I added an extra drive for ceph but after zapping the disk, the creation failed because it was being used by a device-mapper. After rebooting it was created properly but when running ceph osd tree I get: ID WEIGHT TYPE NAME UP/DOWN REWEIGHT…
FerGC
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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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Not able to deploy CEPH monitor

Good day everyone, I have set up a test environment with three virtual machines, to be able to deploy a ceph cluster. The machines are all identical with CentOS7 64bit. I install ceph on all of them, and ceph deploy on node one. I installed the…
Marian Boricean
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Is it safe to run Ceph with 2-way replication on 3 OSD nodes?

Let say I want to achieve maximum useable capacity with data resilience on this 3 OSD nodes setup where each node contains 2x 1TB OSDs. Is it safe run 3 Ceph nodes with 2-way replication? What are the pros and cons of using 2-way? Will it cause data…
chrone
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Ceph gatherkeys KeyNotFoundError: Could not find keyring file: /etc/ceph/ceph.client.admin.keyring on host node1

I have started learning Ceph and got an error too quickly. I have spent about 4 days to solve the problem but unfortunately without success. I read official documentation about quick ceph deploy and I get always the same error in 5th point. This…
Oleksandr
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