:pve-toplevel:
endif::manvolnum[]
-[thumbnail="gui-ceph-status.png"]
+[thumbnail="screenshot/gui-ceph-status.png"]
{pve} unifies your compute and storage systems, i.e. you can use the same
physical nodes within a cluster for both computing (processing VMs and
http://docs.ceph.com/docs/luminous/start/hardware-recommendations/[Ceph's website].
.Avoid RAID
-While RAID controller are build for storage virtualisation, to combine
-independent disks to form one or more logical units. Their caching methods,
-algorithms (RAID modes; incl. JBOD), disk or write/read optimisations are
-targeted towards aforementioned logical units and not to Ceph.
+As Ceph handles data object redundancy and multiple parallel writes to disks
+(OSDs) on its own, using a RAID controller normally doesn’t improve
+performance or availability. On the contrary, Ceph is designed to handle whole
+disks on it's own, without any abstraction in between. RAID controller are not
+designed for the Ceph use case and may complicate things and sometimes even
+reduce performance, as their write and caching algorithms may interfere with
+the ones from Ceph.
WARNING: Avoid RAID controller, use host bus adapter (HBA) instead.
Creating initial Ceph configuration
-----------------------------------
-[thumbnail="gui-ceph-config.png"]
+[thumbnail="screenshot/gui-ceph-config.png"]
After installation of packages, you need to create an initial Ceph
configuration on just one node, based on your network (`10.10.10.0/24`
Creating Ceph Monitors
----------------------
-[thumbnail="gui-ceph-monitor.png"]
+[thumbnail="screenshot/gui-ceph-monitor.png"]
The Ceph Monitor (MON)
footnote:[Ceph Monitor http://docs.ceph.com/docs/luminous/start/intro/]
Creating Ceph OSDs
------------------
-[thumbnail="gui-ceph-osd-status.png"]
+[thumbnail="screenshot/gui-ceph-osd-status.png"]
via GUI or via CLI as follows:
Creating Ceph Pools
-------------------
-[thumbnail="gui-ceph-pools.png"]
+[thumbnail="screenshot/gui-ceph-pools.png"]
A pool is a logical group for storing objects. It holds **P**lacement
**G**roups (PG), a collection of objects.
Ceph Client
-----------
-[thumbnail="gui-ceph-log.png"]
+[thumbnail="screenshot/gui-ceph-log.png"]
You can then configure {pve} to use such pools to store VM or
Container images. Simply use the GUI too add a new `RBD` storage (see