Ceph quota pool. , size = 2), but you can .
- Ceph quota pool. , size = 2), but you can Pools ¶ When you first deploy a cluster without creating a pool, Ceph uses the default pools for storing data. Create a Pool ¶ Before creating pools, refer to the Pool, PG and CRUSH Config Reference. When setting up multiple pools, set an appropriate number of PGs for each pool and for the cluster as a whole. e. A pool provides you with: Resilience: You can set how many OSD are allowed to fail without losing data. For details on placement group numbers refer to setting the number of placement groups The pool type. For replicated pools, it is the desired number of copies/replicas of an object. 17 or newer. CephFS allows quotas to be set on any directory in the system. Ideally, you should override the default value for the number of placement groups in your Ceph configuration file, as the default is NOT ideal. The erasure pools require less raw storage but can perform only some Ceph tasks and may provide decreased performance. , size = 2), but you can . Quotas: When you set quotas on a pool with ceph osd pool set-quota you may limit the maximum number of objects or the maximum number of bytes stored in the specified pool. CephFS quotas rely on the cooperation of the client who is mounting the file system to stop writers when a limit is reached. The quota can restrict the number of bytes or the number of files stored beneath that point in the directory hierarchy. The replicated pools require more raw storage but can implement all Ceph operations. A typical configuration stores an object and one additional copy (i. Learn how to view, set, and remove quotas on any directory in the file system. Ceph File System quotas are fully supported using a FUSE client or using Kernel clients, version 4. Ceph File System quotas are fully supported by using a FUSE client or by using Kernel clients, version 4. Custom CRUSH rules can be created for a pool if the default rule does not fit your use case. Below are the steps to address this issue: The Ceph File System (CephFS) quotas allow you to restrict the number of bytes or the number of files stored in the directory structure. Snapshots: The command ceph osd pool mksnap creates a snapshot of a pool. A modified or adversarial client cannot be prevented from writing as much data as it needs. Each PG belongs to a specific pool: when multiple pools use the same OSDs, make sure that the sum of PG replicas per OSD is in the desired PG-per-OSD target range. This can be either replicated (to recover from lost OSDs by keeping multiple copies of the objects) or erasure (to achieve a kind of generalized parity RAID capability). CRUSH Rules: When data is stored in a pool, the placement of PGs and object replicas (or chunks/shards, in the case of erasure-coded pools) in your cluster is governed by CRUSH rules. To resolve the POOL_QUOTA_EXCEEDED error, you can either increase the pool's quota or delete unnecessary data to free up space. A pool provides you with resilience, placement groups, CRUSH rules, and quotas. Pools ¶ When you first deploy a cluster without creating a pool, Ceph uses the default pools for storing data. , size = 2), but you can Similarly, the complexities of Ceph clients, such as mapping objects into a block device representation or providing an S3/Swift RESTful service, are invisible to the Ceph storage cluster. zmeaw qbtut xlkmpqx spqtlf qedxd uftoonl jvex tudzdh syhhq ctbdsn