up at boot time.
The disabling of ``ceph-disk`` units is done only when calling ``ceph-volume
-simple activate`` directly, but is is avoided when being called by systemd when
+simple activate`` directly, but is avoided when being called by systemd when
the system is booting up.
The activation process requires using both the :term:`OSD id` and :term:`OSD uuid`
``myfs`` across the cluster.
Then, in case there are less than three daemons deployed on the candidate
-hosts, cephadm will then then randomly choose hosts for deploying new daemons.
+hosts, cephadm will then randomly choose hosts for deploying new daemons.
In case there are more than three daemons deployed, cephadm will remove
existing daemons.
lazy_caps_wanted
When a stale client resumes, if the client supports this feature, mds only needs
-to re-issue caps that are explictly wanted.
+to re-issue caps that are explicitly wanted.
::
Note that if you look at the last MDS (which could be a, b, or c -- it's
- random), you will see an an attempt to index a nil value. This is because the
+ random), you will see an attempt to index a nil value. This is because the
last MDS tries to check the load of its neighbor, which does not exist.
5. Run a simple benchmark. In our case, we use the Docker mdtest image to
Would cause any directory loaded into cache or created under ``/tmp`` to be
ephemerally pinned 50 percent of the time.
-It is recomended to only set this to small values, like ``.001`` or ``0.1%``.
+It is recommended to only set this to small values, like ``.001`` or ``0.1%``.
Having too many subtrees may degrade performance. For this reason, the config
``mds_export_ephemeral_random_max`` enforces a cap on the maximum of this
percentage (default: ``.01``). The MDS returns ``EINVAL`` when attempting to
.. note:: Nautilus release or latest Ceph image should be used.
-Before proceding check if the pods are running::
+Before proceeding check if the pods are running::
kubectl -n rook-ceph get pod
Tags on filesystems are stored as property.
Tags on a zpool are stored in the comment property as a concatenated list
-seperated by ``;``
+separated by ``;``
.. _ceph-volume-zfs-tags:
``compression``
---------------
-A compression-enabled device can allways be set using the native zfs settings on
+A compression-enabled device can always be set using the native zfs settings on
a volume or filesystem. This will/can be activated during creation of the volume
of filesystem.
When activated by ``ceph-volume zfs`` this tag will be created.
+ Both *(forward and reverse)* zones, with *fully qualified domain
name (fqdn)* ``(hostname + domain.name)``
- + KDC discover can be set up to to use DNS ``(srv resources)`` as
+ + KDC discover can be set up to use DNS ``(srv resources)`` as
service location protocol *(RFCs 2052, 2782)*, as well as *host
or domain* to the *appropriate realm* ``(txt record)``.
teuthology-kill -r teuthology-2019-12-10_05:00:03-smoke-master-testing-basic-smithi
-Let's call the the argument passed to ``-r`` as test ID. It can be found
+Let's call the argument passed to ``-r`` as test ID. It can be found
easily in the link to the Pulpito page for the tests you triggered. For
example, for the above test ID, the link is - http://pulpito.front.sepia.ceph.com/teuthology-2019-12-10_05:00:03-smoke-master-testing-basic-smithi/
typing "Rados Object Gateway" instead of RGW. Do not use internal
class names like "MDCache" or "Objecter". It is okay to mention
internal structures if they are the direct subject of the message,
-for example in a corruption, but use plain english.
+for example in a corruption, but use plain English.
Example: instead of "Objecter requests" say "OSD client requests"
Example: it is okay to mention internal structure in the context
of "Corrupt session table" (but don't say "Corrupt SessionTable")
====================================================
Now that the recovery scheme is understood, we can discuss the
-generation of of the RADOS operation acknowledgement (ACK) by the
+generation of the RADOS operation acknowledgement (ACK) by the
primary ("sufficient" from above). It is NOT required that the primary
wait for all shards to complete their respective prepare
operations. Using our example where the RADOS operations writes only
incrementing a ref
2) We don't need to load the object_manifest_t for every clone
to determine how to handle removing one -- just the ones
- immediately preceeding and suceeding it.
+ immediately preceding and succeeding it.
All clone operations will need to consider adjacent chunk_maps
when adding or removing references.
Persistent Memory
-----------------
-As the intial sequential design above matures, we'll introduce
+As the initial sequential design above matures, we'll introduce
persistent memory support for metadata and caching structures.
Design
RPM Packages
~~~~~~~~~~~~
-Ceph requires additional additional third party libraries.
+Ceph requires additional third party libraries.
To add the EPEL repository, execute the following
.. prompt:: bash $
ceph-bluestore-tool fsck --path *osd path* \
--bluefs_replay_recovery=true --bluefs_replay_recovery_disable_compact=true
-If above fsck is successfull fix procedure can be applied.
+If above fsck is successful fix procedure can be applied.
Availability
============
ceph osd pool application rm <pool-name> <app> <key>
-Subcommand ``set`` assosciates or updates, if it already exists, a key-value
+Subcommand ``set`` associates or updates, if it already exists, a key-value
pair with the given application for the given pool.
Usage::
Placement by labels
-------------------
-Daemons can be explictly placed on hosts that match a specific label::
+Daemons can be explicitly placed on hosts that match a specific label::
orch apply prometheus --placement="label:mylabel"
---------
A :ref:`orchestrator-cli-placement-spec` defines the placement of
-daemons of a specifc service.
+daemons of a specific service.
In general, stateless services do not require any specific placement
rules as they can run anywhere that sufficient system resources
See :ref:`rados-replacing-an-osd` for the underlying process.
Replacing OSDs is fundamentally a two-staged process, as users need to
-physically replace drives. The orchestrator therefor exposes this two-staged process.
+physically replace drives. The orchestrator therefore exposes this two-staged process.
Phase one is a call to :meth:`Orchestrator.remove_daemons` with ``destroy=True`` in order to mark
the OSD as destroyed.
==========================================
Ceph stores and updates the checksums of objects stored in the cluster. When a scrub is performed on a placement group, the OSD attempts to choose an authoritative copy from among its replicas. Among all of the possible cases, only one case is consistent. After a deep scrub, Ceph calculates the checksum of an object read from the disk and compares it to the checksum previously recorded. If the current checksum and the previously recorded checksums do not match, that is an inconsistency. In the case of replicated pools, any mismatch between the checksum of any replica of an object and the checksum of the authoritative copy means that there is an inconsistency.
-The "pg repair" command attempts to fix inconsistencies of various kinds. If "pg repair" finds an inconsisent placement group, it attempts to overwrite the digest of the inconsistent copy with the digest of the authoritative copy. If "pg repair" finds an inconsistent replicated pool, it marks the inconsistent copy as missing. Recovery, in the case of replicated pools, is beyond the scope of "pg repair".
+The "pg repair" command attempts to fix inconsistencies of various kinds. If "pg repair" finds an inconsistent placement group, it attempts to overwrite the digest of the inconsistent copy with the digest of the authoritative copy. If "pg repair" finds an inconsistent replicated pool, it marks the inconsistent copy as missing. Recovery, in the case of replicated pools, is beyond the scope of "pg repair".
For erasure coded and bluestore pools, Ceph will automatically repair if osd_scrub_auto_repair (configuration default "false") is set to true and at most osd_scrub_auto_repair_num_errors (configuration default 5) errors are found.
sudo ceph-authtool /etc/ceph/ceph.keyring -n client.ringo --cap osd 'allow rwx' --cap mon 'allow rwx'
To update the user to the Ceph Storage Cluster, you must update the user
-in the keyring to the user entry in the the Ceph Storage Cluster. ::
+in the keyring to the user entry in the Ceph Storage Cluster. ::
sudo ceph auth import -i /etc/ceph/ceph.keyring
step set_choose_tries 100
-The relevant part of of the ``crush.txt`` file should look something
+The relevant part of the ``crush.txt`` file should look something
like::
rule erasurepool {
* ``acl_profiles`` (array)
-An array of of ``acl_profile``.
+An array of ``acl_profile``.
* ``acl_profile`` (container)
workload with a smaller number of buckets but higher number of objects (hundreds of thousands)
per bucket you would look at tuning ``rgw lc max wp worker`` from the default value of 3.
-:NOTE: When looking to to tune either of these specific values please validate the
+:NOTE: When looking to tune either of these specific values please validate the
current Cluster performance and Ceph Object Gateway utilization before increasing.
Garbage Collection Settings
In this mode, the operation is acked only after the notification is sent to the topic's configured endpoint, which means that the
round trip time of the notification is added to the latency of the operation itself.
-.. note:: The original triggering operation will still be considered as sucessful even if the notification fail with an error, cannot be deliverd or times out
+.. note:: The original triggering operation will still be considered as successful even if the notification fail with an error, cannot be deliverd or times out
Notifications may also be sent asynchronously. They will be committed into persistent storage and then asynchronously sent to the topic's configured endpoint.
In this case, the only latency added to the original operation is of committing the notification to persistent storage.
ListOpenIDConnectProviders
--------------------------
-Lists infomation about all IDPs
+Lists information about all IDPs
Request Parameters
~~~~~~~~~~~~~~~~~~
| **S3select** has a definite set of functionalities that should be implemented (if we wish to stay compliant with AWS), currently only a portion of it is implemented.
| The implemented software architecture supports basic arithmetic expressions, logical and compare expressions, including nested function calls and casting operators, that alone enables the user reasonable flexibility.
- | review the bellow feature-table_.
+ | review the below feature-table_.
Error Handling
When configuring the VM for use with Ceph, it is important to use ``virsh``
where appropriate. Additionally, ``virsh`` commands often require root
privileges (i.e., ``sudo``) and will not return appropriate results or notify
-you that that root privileges are required. For a reference of ``virsh``
+you that root privileges are required. For a reference of ``virsh``
commands, refer to `Virsh Command Reference`_.
projects / ceph.git / commitdiff