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@ -19,8 +19,8 @@ short_description: Module to control VDO
description:
- This module controls the VDO dedupe and compression device.
- VDO, or Virtual Data Optimizer, is a device-mapper target that provides inline block-level deduplication, compression, and thin provisioning
capabilities to primary storage.
- VDO, or Virtual Data Optimizer, is a device-mapper target that provides inline block-level deduplication, compression,
and thin provisioning capabilities to primary storage.
extends_documentation_fragment:
- community.general.attributes
@ -38,19 +38,21 @@ options:
required: true
state:
description:
- Whether this VDO volume should be V(present) or V(absent). If a V(present) VDO volume does not exist, it will be created. If a V(present)
VDO volume already exists, it will be modified, by updating the configuration, which will take effect when the VDO volume is restarted.
Not all parameters of an existing VDO volume can be modified; the C(statusparamkeys) list in the code contains the parameters that can
be modified after creation. If an V(absent) VDO volume does not exist, it will not be removed.
- Whether this VDO volume should be V(present) or V(absent). If a V(present) VDO volume does not exist, it is created.
If a V(present) VDO volume already exists, it is modified by updating the configuration, which takes effect when the
VDO volume is restarted. Not all parameters of an existing VDO volume can be modified; the C(statusparamkeys) list
in the code contains the parameters that can be modified after creation. If an V(absent) VDO volume does not exist,
it is not removed.
type: str
choices: [absent, present]
default: present
activated:
description:
- The C(activate) status for a VDO volume. If this is set to V(false), the VDO volume cannot be started, and it will not start on system
startup. However, on initial creation, a VDO volume with "activated" set to "off" will be running, until stopped. This is the default
behavior of the C(vdo create) command; it provides the user an opportunity to write a base amount of metadata (filesystem, LVM headers,
and so on) to the VDO volume prior to stopping the volume, and leaving it deactivated until ready to use.
- The C(activate) status for a VDO volume. If this is set to V(false), the VDO volume cannot be started, and it will
not start on system startup. However, on initial creation, a VDO volume with "activated" set to "off" will be running,
until stopped. This is the default behavior of the C(vdo create) command; it provides the user an opportunity to write
a base amount of metadata (filesystem, LVM headers, and so on) to the VDO volume prior to stopping the volume, and
leaving it deactivated until ready to use.
type: bool
running:
description:
@ -64,131 +66,135 @@ options:
type: str
logicalsize:
description:
- The logical size of the VDO volume (in megabytes, or LVM suffix format). If not specified for a new volume, this defaults to the same
size as the underlying storage device, which is specified in the O(device) parameter. Existing volumes will maintain their size if the
logicalsize parameter is not specified, or is smaller than or identical to the current size. If the specified size is larger than the
current size, a C(growlogical) operation will be performed.
- The logical size of the VDO volume (in megabytes, or LVM suffix format). If not specified for a new volume, this defaults
to the same size as the underlying storage device, which is specified in the O(device) parameter. Existing volumes
maintain their size if the O(logicalsize) parameter is not specified, or is smaller than or identical to the current
size. If the specified size is larger than the current size, a C(growlogical) operation is performed.
type: str
deduplication:
description:
- Configures whether deduplication is enabled. The default for a created volume is V(enabled). Existing volumes will maintain their previously
configured setting unless a different value is specified in the playbook.
- Configures whether deduplication is enabled. The default for a created volume is V(enabled). Existing volumes maintain
their previously configured setting unless a different value is specified in the playbook.
type: str
choices: [disabled, enabled]
compression:
description:
- Configures whether compression is enabled. The default for a created volume is V(enabled). Existing volumes will maintain their previously
configured setting unless a different value is specified in the playbook.
- Configures whether compression is enabled. The default for a created volume is V(enabled). Existing volumes maintain
their previously configured setting unless a different value is specified in the playbook.
type: str
choices: [disabled, enabled]
blockmapcachesize:
description:
- The amount of memory allocated for caching block map pages, in megabytes (or may be issued with an LVM-style suffix of K, M, G, or T).
The default (and minimum) value is V(128M). The value specifies the size of the cache; there is a 15% memory usage overhead. Each 1.25G
of block map covers 1T of logical blocks, therefore a small amount of block map cache memory can cache a significantly large amount of
block map data.
- Existing volumes will maintain their previously configured setting unless a different value is specified in the playbook.
- The amount of memory allocated for caching block map pages, in megabytes (or may be issued with an LVM-style suffix
of K, M, G, or T). The default (and minimum) value is V(128M). The value specifies the size of the cache; there is
a 15% memory usage overhead. Each 1.25G of block map covers 1T of logical blocks, therefore a small amount of block
map cache memory can cache a significantly large amount of block map data.
- Existing volumes maintain their previously configured setting unless a different value is specified in the playbook.
type: str
readcache:
description:
- Enables or disables the read cache. The default is V(disabled). Choosing V(enabled) enables a read cache which may improve performance
for workloads of high deduplication, read workloads with a high level of compression, or on hard disk storage. Existing volumes will maintain
their previously configured setting unless a different value is specified in the playbook.
- Enables or disables the read cache. The default is V(disabled). Choosing V(enabled) enables a read cache which may
improve performance for workloads of high deduplication, read workloads with a high level of compression, or on hard
disk storage. Existing volumes maintain their previously configured setting unless a different value is specified
in the playbook.
- The read cache feature is available in VDO 6.1 and older.
type: str
choices: [disabled, enabled]
readcachesize:
description:
- Specifies the extra VDO device read cache size in megabytes. This is in addition to a system-defined minimum. Using a value with a suffix
of K, M, G, or T is optional. The default value is V(0). 1.125 MB of memory per bio thread will be used per 1 MB of read cache specified
(for example, a VDO volume configured with 4 bio threads will have a read cache memory usage overhead of 4.5 MB per 1 MB of read cache
specified). Existing volumes will maintain their previously configured setting unless a different value is specified in the playbook.
- Specifies the extra VDO device read cache size in megabytes. This is in addition to a system-defined minimum. Using
a value with a suffix of K, M, G, or T is optional. The default value is V(0). 1.125 MB of memory per bio thread is
used per 1 MB of read cache specified (for example, a VDO volume configured with 4 bio threads has a read cache memory
usage overhead of 4.5 MB per 1 MB of read cache specified). Existing volumes maintain their previously configured
setting unless a different value is specified in the playbook.
- The read cache feature is available in VDO 6.1 and older.
type: str
emulate512:
description:
- Enables 512-byte emulation mode, allowing drivers or filesystems to access the VDO volume at 512-byte granularity, instead of the default
4096-byte granularity.
- Enables 512-byte emulation mode, allowing drivers or filesystems to access the VDO volume at 512-byte granularity,
instead of the default 4096-byte granularity.
- Only recommended when a driver or filesystem requires 512-byte sector level access to a device.
- This option is only available when creating a new volume, and cannot be changed for an existing volume.
type: bool
default: false
growphysical:
description:
- Specifies whether to attempt to execute a C(growphysical) operation, if there is enough unused space on the device. A C(growphysical)
operation will be executed if there is at least 64 GB of free space, relative to the previous physical size of the affected VDO volume.
- Specifies whether to attempt to execute a C(growphysical) operation, if there is enough unused space on the device.
A C(growphysical) operation is executed if there is at least 64 GB of free space, relative to the previous physical
size of the affected VDO volume.
type: bool
default: false
slabsize:
description:
- The size of the increment by which the physical size of a VDO volume is grown, in megabytes (or may be issued with an LVM-style suffix
of K, M, G, or T). Must be a power of two between 128M and 32G. The default is V(2G), which supports volumes having a physical size up
to 16T. The maximum, V(32G), supports a physical size of up to 256T. This option is only available when creating a new volume, and cannot
be changed for an existing volume.
- The size of the increment by which the physical size of a VDO volume is grown, in megabytes (or may be issued with
an LVM-style suffix of K, M, G, or T). Must be a power of two between 128M and 32G. The default is V(2G), which supports
volumes having a physical size up to 16T. The maximum, V(32G), supports a physical size of up to 256T. This option
is only available when creating a new volume, and cannot be changed for an existing volume.
type: str
writepolicy:
description:
- Specifies the write policy of the VDO volume.
- The V(sync) mode acknowledges writes only after data is on stable storage.
- The V(async) mode acknowledges writes when data has been cached for writing to stable storage.
- The default (and highly recommended) V(auto) mode checks the storage device to determine whether it supports flushes. Devices that support
flushes will result in a VDO volume in V(async) mode, while devices that do not support flushes will run in V(sync) mode.
- Existing volumes will maintain their previously configured setting unless a different value is specified in the playbook.
- The default (and highly recommended) V(auto) mode checks the storage device to determine whether it supports flushes.
Devices that support flushes result in a VDO volume in V(async) mode, while devices that do not support flushes run
in V(sync) mode.
- Existing volumes maintain their previously configured setting unless a different value is specified in the playbook.
type: str
choices: [async, auto, sync]
indexmem:
description:
- Specifies the amount of index memory in gigabytes. The default is V(0.25). The special decimal values V(0.25), V(0.5), and V(0.75) can
be used, as can any positive integer. This option is only available when creating a new volume, and cannot be changed for an existing
volume.
- Specifies the amount of index memory in gigabytes. The default is V(0.25). The special decimal values V(0.25), V(0.5),
and V(0.75) can be used, as can any positive integer. This option is only available when creating a new volume, and
cannot be changed for an existing volume.
type: str
indexmode:
description:
- Specifies the index mode of the Albireo index.
- The default is V(dense), which has a deduplication window of 1 GB of index memory per 1 TB of incoming data, requiring 10 GB of index
data on persistent storage.
- The V(sparse) mode has a deduplication window of 1 GB of index memory per 10 TB of incoming data, but requires 100 GB of index data on
persistent storage.
- The default is V(dense), which has a deduplication window of 1 GB of index memory per 1 TB of incoming data, requiring
10 GB of index data on persistent storage.
- The V(sparse) mode has a deduplication window of 1 GB of index memory per 10 TB of incoming data, but requires 100
GB of index data on persistent storage.
- This option is only available when creating a new volume, and cannot be changed for an existing volume.
type: str
choices: [dense, sparse]
ackthreads:
description:
- Specifies the number of threads to use for acknowledging completion of requested VDO I/O operations. Valid values are integer values from
V(1) to V(100) (lower numbers are preferable due to overhead). The default is V(1). Existing volumes will maintain their previously configured
setting unless a different value is specified in the playbook.
- Specifies the number of threads to use for acknowledging completion of requested VDO I/O operations. Valid values
are integer values from V(1) to V(100) (lower numbers are preferable due to overhead). The default is V(1). Existing
volumes maintain their previously configured setting unless a different value is specified in the playbook.
type: str
biothreads:
description:
- Specifies the number of threads to use for submitting I/O operations to the storage device. Valid values are integer values from V(1)
to V(100) (lower numbers are preferable due to overhead). The default is V(4). Existing volumes will maintain their previously configured
setting unless a different value is specified in the playbook.
- Specifies the number of threads to use for submitting I/O operations to the storage device. Valid values are integer
values from V(1) to V(100) (lower numbers are preferable due to overhead). The default is V(4). Existing volumes maintain
their previously configured setting unless a different value is specified in the playbook.
type: str
cputhreads:
description:
- Specifies the number of threads to use for CPU-intensive work such as hashing or compression. Valid values are integer values from V(1)
to V(100) (lower numbers are preferable due to overhead). The default is V(2). Existing volumes will maintain their previously configured
setting unless a different value is specified in the playbook.
- Specifies the number of threads to use for CPU-intensive work such as hashing or compression. Valid values are integer
values from V(1) to V(100) (lower numbers are preferable due to overhead). The default is V(2). Existing volumes maintain
their previously configured setting unless a different value is specified in the playbook.
type: str
logicalthreads:
description:
- Specifies the number of threads across which to subdivide parts of the VDO processing based on logical block addresses. Valid values are
integer values from V(1) to V(100) (lower numbers are preferable due to overhead). The default is V(1). Existing volumes will maintain
their previously configured setting unless a different value is specified in the playbook.
- Specifies the number of threads across which to subdivide parts of the VDO processing based on logical block addresses.
Valid values are integer values from V(1) to V(100) (lower numbers are preferable due to overhead). The default is
V(1). Existing volumes maintain their previously configured setting unless a different value is specified in the playbook.
type: str
physicalthreads:
description:
- Specifies the number of threads across which to subdivide parts of the VDO processing based on physical block addresses. Valid values
are integer values from V(1) to V(16) (lower numbers are preferable due to overhead). The physical space used by the VDO volume must be
larger than (O(slabsize) * O(physicalthreads)). The default is V(1). Existing volumes will maintain their previously configured setting
unless a different value is specified in the playbook.
- Specifies the number of threads across which to subdivide parts of the VDO processing based on physical block addresses.
Valid values are integer values from V(1) to V(16) (lower numbers are preferable due to overhead). The physical space
used by the VDO volume must be larger than (O(slabsize) * O(physicalthreads)). The default is V(1). Existing volumes
maintain their previously configured setting unless a different value is specified in the playbook.
type: str
force:
description:
- When creating a volume, ignores any existing file system or VDO signature already present in the storage device. When stopping or removing
a VDO volume, first unmounts the file system stored on the device if mounted.
- B(Warning:) Since this parameter removes all safety checks it is important to make sure that all parameters provided are accurate and
intentional.
- When creating a volume, ignores any existing file system or VDO signature already present in the storage device. When
stopping or removing a VDO volume, first unmounts the file system stored on the device if mounted.
- B(Warning:) Since this parameter removes all safety checks it is important to make sure that all parameters provided
are accurate and intentional.
type: bool
default: false
version_added: 2.4.0