mirror of
https://github.com/ceph/ceph
synced 2024-12-30 07:23:11 +00:00
6fc92dc981
Cleaner and easier. Also implicitly documents the config set command, which hadn't been explicitly called out in the docs before. Signed-off-by: John Spray <john.spray@redhat.com>
50 lines
1.6 KiB
ReStructuredText
50 lines
1.6 KiB
ReStructuredText
==========================
|
|
iSCSI Gateway Requirements
|
|
==========================
|
|
|
|
To implement the Ceph iSCSI gateway there are a few requirements. It is recommended
|
|
to use two to four iSCSI gateway nodes for a highly available Ceph iSCSI gateway
|
|
solution.
|
|
|
|
For hardware recommendations, see the `Hardware Recommendation page <http://docs.ceph.com/docs/master/start/hardware-recommendations/>`_
|
|
for more details.
|
|
|
|
.. note::
|
|
On the iSCSI gateway nodes, the memory footprint of the RBD images
|
|
can grow to a large size. Plan memory requirements accordingly based
|
|
off the number RBD images mapped.
|
|
|
|
There are no specific iSCSI gateway options for the Ceph Monitors or
|
|
OSDs, but it is important to lower the default timers for detecting
|
|
down OSDs to reduce the possibility of initiator timeouts. The following
|
|
configuration options are suggested for each OSD node in the storage
|
|
cluster::
|
|
|
|
[osd]
|
|
osd heartbeat grace = 20
|
|
osd heartbeat interval = 5
|
|
|
|
- Online Updating Using the Ceph Monitor
|
|
|
|
::
|
|
|
|
ceph tell <daemon_type>.<id> config set <parameter_name> <new_value>
|
|
|
|
::
|
|
|
|
ceph tell osd.0 config set osd_heartbeat_grace 20
|
|
ceph tell osd.0 config set osd_heartbeat_interval 5
|
|
|
|
- Online Updating on the OSD Node
|
|
|
|
::
|
|
|
|
ceph daemon <daemon_type>.<id> config set osd_client_watch_timeout 15
|
|
|
|
::
|
|
|
|
ceph daemon osd.0 config set osd_heartbeat_grace 20
|
|
ceph daemon osd.0 config set osd_heartbeat_interval 5
|
|
|
|
For more details on setting Ceph's configuration options, see the `Configuration page <http://docs.ceph.com/docs/master/rados/configuration/>`_.
|