Realtime :
mount -o discard /dev/rbd0 /mnt/myrbd
Using batch :
fstrim /mnt/myrbd
The empty FS :
$ rbd create rbd/myrbd --size=20480
$ mkfs.xfs /dev/rbd0
$ rbd diff rbd/myrbd | awk '{ SUM += $2 } END { print SUM/1024/1024 " MB" }'
14.4062 MB
With a big file... :
$ mount /dev/rbd0 …The purpose of this test is to map a RadosGw Bucket to a specific Ceph pool. For exemple, if using a fast pool with ssd and a low pool for archive...
standard_bucket datas --> .rgw.buckets (default pool)
specific_bucket datas --> .rgw.buckets.custom
First, we create a pool .rgw.buckets.custom …
{% blockquote LXC 2.0.0 First Support for Ceph RBD : http://cephnotes.ksperis.com/blog/2016/04/14/lxc-2-dot-0-0-first-support-for-ceph-rbd %} Update on Apr 14th, 2016:
A simple way to secure your data with containers is to use a distributed storage such as Ceph for LXC root storage.
For exemple :
# lxc-create -n …A quick howto to install OpenNebula 4.8 with support for Ceph on Debian Wheezy.
$ onedatastore show cephds
DATASTORE 101 INFORMATION
ID : 101
NAME : cephds
USER : oneadmin
GROUP : oneadmin
CLUSTER : -
TYPE : IMAGE
DS_MAD : ceph
TM_MAD : ceph
BASE PATH : /var/lib/one//datastores/101
DISK_TYPE : RBD
Install …
For exemple :
# rados lspools
data
metadata
rbd
<---- ?????
.eu.rgw.root
.eu-west-1.domain.rgw
.eu-west-1.rgw.root
.eu-west-1.rgw.control
.eu-west-1.rgw.gc
.eu-west-1.rgw.buckets.index
.eu-west-1.rgw.buckets
.eu-west-1.log
# ceph osd dump | grep "pool 4 "
pool 4 '' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 8 …