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Questions tagged [ceph]

Ceph is an open-source, distributed storage system.

8 questions
3
votes
0 answers

Why does SQLite work on CephFS but not NFS

They're both network based filesystem protocols. So why can I mount SQLite databases on CephFS, but not using NFS? I've had no issues with SQLite on CephFS, but when I mount stuff that uses SQLite on NFS, I constantly get 'database is locked'…
cclloyd
  • 882
2
votes
1 answer

Why does cephadm keep saying Host is down

I'm trying to set up a test instance of Ceph on my local machine (Windows 10, running in a wsl environment). I've been following the instuctions however when it comes to bootstrapping the cluster with the following: sudo cephadm bootstrap --mon-ip…
MysteriousWaffle
  • 123
1
vote
0 answers

Mount or sync an S3 versioned bucket with rewind - back in time

Assuming I have an S3 versioned bucket (backed by Ceph), I would like to restore from it at a specific time. mcli has a --rewind feature that allows some operations to time-travel into the past taking advantage of the versions. Unfortunately, this…
Robert Cutajar
  • 161
0
votes
1 answer

is it possible to run a ceph rbd on erasure coded ceph pool, without a separate replicated metadata pool?

I'm new to ceph so forgive me if this is common knowledge, but I can't find it. this seems like a simple question, but I can't find any solid answer. in 2017 when rbd on ec pools was first implemented, you had to have a separate replicated pool to…
Stu
  • 1,296
0
votes
1 answer

Can't remove ceph xattrs on CephFS on Linux

I had set xattrs for quota limits on CephFS $ setfattr -n ceph.quota.max_bytes -v 1100000000 /mnt/cephfs/data/ I can get value of this attribute $ getfattr -n ceph.quota.max_bytes /mnt/cephfs/data/ getfattr: Removing leading '/' from absolute path…
Dan B
  • 1
0
votes
1 answer

borg backup is processing all files instead of modified

please advise how to correctly make borgbackup to process and copy only modified source files and their diffs to destination? every week we make our data snapshot in cephfs: /data/.snap/snap1/ /data/.snap/snap2/ and then borg backup of the snapshot…
Gena Mrt
  • 1
0
votes
1 answer

How to cluster Mixtile Blade 3 nodes, which are partially equipped with U.2 drives

I'm planning to build a cluster of single-board computers I could then use as file (using Ceph) and database (Postgres XL) server. As the performance of the Mixtile Blade 3 quite impresses me, I think I will couple a handful of them into a…
Neppomuk
  • 369
0
votes
2 answers

Create a new /dev/sd{b,c,d} on WSL for Ceph

I'm trying to run Ceph on (micro)K8s which running on my Ubuntu WSL distory. OSD pods are not being created because there is no supported device is available (see logs below). Ceph is configured to UseAllDevices which you can see it searching for…
a11hard
  • 131