Configuration override options

Use these configuration override options for Ceph Block Devices on global and pool levels.

Global level

Table 1 lists the override key options on a global level.

Table 1. Global level override key options
Key Description Type Default
rbd_qos_bps_burst The desired burst limit of I/O bytes. Integer 0
rbd_qos_bps_limit The desired limit of I/O bytes per second. Integer 0
rbd_qos_iops_burst The desired burst limit of I/O operations. Integer 0
rbd_qos_iops_limit The desired limit of I/O operations per second. Integer 0
rbd_qos_read_bps_burst The desired burst limit of read bytes. Integer 0
rbd_qos_read_bps_limit The desired limit of read bytes per second. Integer 0
rbd_qos_read_iops_burst The desired burst limit of read operations. Integer 0
rbd_qos_read_iops_limit The desired limit of read operations per second. Integer 0
rbd_qos_write_bps_burst The desired burst limit of write bytes. Integer 0
rbd_qos_write_bps_limit The desired limit of write bytes per second. Integer 0
rbd_qos_write_iops_burst The desired burst limit of write operations. Integer 0
rbd_qos_write_iops_limit The desired burst limit of write operations per second. Integer 0
Table 2 describes how to use the global override options listed in Table 1.
  • Replace CONFIG_ENTITY with the global client or client ID.
  • Replace KEY with the configuration key.
  • Replace VALUE with the configuration value.
Table 2. Global override command usage
Command syntax Description 
rbd config global set CONFIG_ENTITY KEY VALUE
 Set a global level configuration override. 
rbd config global get CONFIG_ENTITY KEY
 Get a global level configuration override. 
rbd config global list CONFIG_ENTITY
 List the global level configuration overrides. 
rbd config global remove CONFIG_ENTITY KEY
 Remove a global level configuration override.

Pool level

Table 3 describes how to override pool options.
  • Replace CONFIG_ENTITY with the global client or client ID.
  • Replace KEY with the configuration key.
  • Replace VALUE with the configuration value.
  • Replace POOL_NAME with the name of the pool.
Table 3. Pool level override command usage
Command syntax Description 
rbd config pool set POOL_NAME KEY VALUE
 Set a pool level configuration override. 
rbd config pool get POOL_NAME KEY
 Get a pool level configuration override. 
rbd config pool list POOL_NAME
 List the pool level configuration overrides. 
rbd config pool remove POOL_NAME KEY
 Remove a pool level configuration override.