Docs.ceph.com

Cluster Operations — Ceph Documentation

WEBLow-level cluster operations consist of starting, stopping, and restarting a particular daemon within a cluster; changing the settings of a particular daemon or subsystem; and, adding …

Actived: 9 days ago

URL: https://docs.ceph.com/en/latest/rados/operations/

Ceph Dashboard — Ceph Documentation

WEBThe Ceph Dashboard is a built-in web-based Ceph management and monitoring application to administer various aspects and objects of the cluster. It is implemented as a Ceph …

Category: Health Go Health

Cephadm Operations — Ceph Documentation

WEBThe cephadm orchestrator module writes logs to the cephadm cluster log channel. You can monitor Ceph’s activity in real time by reading the logs as they fill up. Run the following …

Category: Health Go Health

CephFS health messages — Ceph Documentation

WEBThe Ceph monitor daemons will generate health messages in response to certain states of the file system map structure (and the enclosed MDS maps). Message: mds rank (s) …

Category: Health Go Health

Health checks — Ceph Documentation

WEBThis is easily corrected by setting the pg_num value for the affected pool (s) to a nearby power of two. To do so, run the following command: ceph osd pool set <pool-name> …

Category: Health Go Health

Health checks — Ceph Documentation

WEBOverview. ¶. There is a finite set of possible health messages that a Ceph cluster can raise – these are defined as health checks which have unique identifiers. The identifier is a …

Category: Health Go Health

Ceph Dashboard — Ceph Documentation

WEBWhile Ceph Dashboard might work in older browsers, we cannot guarantee compatibility and recommend keeping your browser up to date. Enabling¶. If you have installed ceph …

Category: Health Go Health

Device Management — Ceph Documentation

WEBFailure prediction¶. Ceph can predict life expectancy and device failures based on the health metrics it collects. There are three modes: none: disable device failure …

Category: Health Go Health

Device Management — Ceph Documentation

WEBDevice Management. Device management allows Ceph to address hardware failure. Ceph tracks hardware storage devices (HDDs, SSDs) to see which devices are managed by …

Category: Health Go Health

Health checks — Ceph Documentation

WEBThis is easily corrected by setting the pg_num value for the affected pool (s) to a nearby power of two. To do so, run the following command: ceph osd pool set <pool-name> …

Category: Health Go Health

MDS Cache Configuration — Ceph Documentation

WEBThis is done through the mds_cache_memory_limit configuration: mds_cache_memory_limit. This sets a target maximum memory usage of the MDS …

Category: Health Go Health

Troubleshooting OSDs — Ceph Documentation

WEBBefore troubleshooting the cluster’s OSDs, check the monitors and the network. First, determine whether the monitors have a quorum. Run the ceph health command or the …

Category: Health Go Health

Monitor Config Reference — Ceph Documentation

WEBThe Ceph Monitor’s primary function is to maintain a master copy of the cluster map. Monitors also provide authentication and logging services. All changes in the monitor …

Category: Health Go Health

Monitoring a Cluster — Ceph Documentation

WEBAfter you start your cluster, and before you start reading and/or writing data, you should check your cluster’s status. To check a cluster’s status, run the following command: …

Category: Health Go Health

CVE-2021-20288: Unauthorized global_id reuse in cephx

WEBAffected versions. All prior versions of Ceph monitors fail to ensure that global_id reclaim attempts are authentic. In addition, all user-space daemons and clients starting from …

Category: Health Go Health

Pool, PG and CRUSH Config Reference — Ceph Documentation

WEB[global] # By default, Ceph makes three replicas of RADOS objects. If you want # to maintain four copies of an object the default value--a primary # copy and three replica …

Category: Health Go Health

Troubleshooting PGs — Ceph Documentation

WEBTroubleshooting PGs Placement Groups Never Get Clean . If, after you have created your cluster, any Placement Groups (PGs) remain in the active status, the active+remapped …

Category: Health Go Health

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