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1 | =============== |
2 | Configuration | |
3 | =============== | |
4 | ||
5 | Ceph can run with a cluster containing thousands of Object Storage Devices | |
6 | (OSDs). A minimal system will have at least two OSDs for data replication. To | |
7 | configure OSD clusters, you must provide settings in the configuration file. | |
8 | Ceph provides default values for many settings, which you can override in the | |
9 | configuration file. Additionally, you can make runtime modification to the | |
10 | configuration using command-line utilities. | |
11 | ||
12 | When Ceph starts, it activates three daemons: | |
13 | ||
14 | - ``ceph-mon`` (mandatory) | |
15 | - ``ceph-osd`` (mandatory) | |
16 | - ``ceph-mds`` (mandatory for cephfs only) | |
17 | ||
18 | Each process, daemon or utility loads the host's configuration file. A process | |
19 | may have information about more than one daemon instance (*i.e.,* multiple | |
20 | contexts). A daemon or utility only has information about a single daemon | |
21 | instance (a single context). | |
22 | ||
23 | .. note:: Ceph can run on a single host for evaluation purposes. | |
24 | ||
25 | ||
26 | .. raw:: html | |
27 | ||
28 | <table cellpadding="10"><colgroup><col width="50%"><col width="50%"></colgroup><tbody valign="top"><tr><td><h3>Configuring the Object Store</h3> | |
29 | ||
30 | For general object store configuration, refer to the following: | |
31 | ||
32 | .. toctree:: | |
33 | :maxdepth: 1 | |
34 | ||
d2e6a577 | 35 | Storage devices <storage-devices> |
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36 | ceph-conf |
37 | ||
38 | ||
39 | .. raw:: html | |
40 | ||
41 | </td><td><h3>Reference</h3> | |
42 | ||
43 | To optimize the performance of your cluster, refer to the following: | |
44 | ||
45 | .. toctree:: | |
46 | :maxdepth: 1 | |
47 | ||
48 | Network Settings <network-config-ref> | |
49 | Auth Settings <auth-config-ref> | |
50 | Monitor Settings <mon-config-ref> | |
51 | mon-lookup-dns | |
52 | Heartbeat Settings <mon-osd-interaction> | |
53 | OSD Settings <osd-config-ref> | |
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54 | BlueStore Settings <bluestore-config-ref> |
55 | FileStore Settings <filestore-config-ref> | |
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56 | Journal Settings <journal-ref> |
57 | Pool, PG & CRUSH Settings <pool-pg-config-ref.rst> | |
58 | Messaging Settings <ms-ref> | |
59 | General Settings <general-config-ref> | |
60 | ||
61 | ||
62 | .. raw:: html | |
63 | ||
64 | </td></tr></tbody></table> |