9889b8ce7f
lvmetad is usually combined with event-based system services that automatically run pvscan --cache on disks added or removed. This way, the cache is automatically updated with metadata from new disks when they appear. LVM udev rules and systemd services implement this automation. Automatic scanning is usually combined with automatic activation. For more information, see pvscan(8). Signed-off-by: Pascal de Bruijn <p.debruijn@unilogic.nl> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
68 lines
2.4 KiB
Plaintext
68 lines
2.4 KiB
Plaintext
config BR2_PACKAGE_LVM2
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bool "lvm2 & device mapper"
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depends on BR2_TOOLCHAIN_HAS_THREADS
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depends on BR2_USE_MMU # needs fork()
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depends on !BR2_STATIC_LIBS # It fails to build statically
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select BR2_PACKAGE_LIBAIO
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help
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This is LVM2, the rewrite of The Linux Logical Volume Manager.
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LVM supports enterprise level volume management of disk and
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disk subsystems by grouping arbitrary disks into volume
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groups. The total capacity of volume groups can be allocated
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to logical volumes, which are accessed as regular block
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devices.
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The Linux Kernel Device Mapper is the LVM
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(Linux Logical Volume Management) Team's implementation of a
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minimalistic kernel-space driver that handles volume
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management, while keeping knowledge of the underlying device
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layout in user-space. This makes it useful for not only LVM,
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but EVMS, software raid, and other drivers that create
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"virtual" block devices.
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http://www.sourceware.org/lvm2/
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if BR2_PACKAGE_LVM2
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config BR2_PACKAGE_LVM2_STANDARD_INSTALL
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bool "standard install instead of only dmsetup"
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default y if !BR2_PACKAGE_LVM2_DMSETUP_ONLY # legacy 2013.11
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# http://lists.busybox.net/pipermail/buildroot/2016-August/170592.html
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depends on !BR2_TOOLCHAIN_USES_MUSL
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help
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Install the standard suite of lvm2 programs. When this option
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is not set, only dmsetup is installed.
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comment "lvm2 standard install needs a glibc or uClibc toolchain"
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depends on BR2_TOOLCHAIN_USES_MUSL
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config BR2_PACKAGE_LVM2_APP_LIBRARY
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bool "install application library"
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# http://lists.busybox.net/pipermail/buildroot/2016-August/170592.html
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depends on !BR2_TOOLCHAIN_USES_MUSL
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select BR2_PACKAGE_LVM2_STANDARD_INSTALL
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help
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Install application library (liblvm2app).
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comment "lvm2 application library needs a glibc or uClibc toolchain"
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depends on BR2_TOOLCHAIN_USES_MUSL
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config BR2_PACKAGE_LVM2_LVMETAD
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bool "install lvmetad"
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select BR2_PACKAGE_LVM2_APP_LIBRARY
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help
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Install lvmetad
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The lvmetad daemon caches LVM metadata so that LVM commands
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can read metadata from the cache rather than scanning disks.
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This can be an advantage because scanning disks is time
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consuming and may interfere with the normal work of the
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system. lvmetad can be a disadvantage when disk event
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notifications from the system are unreliable.
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endif
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comment "lvm2 needs a toolchain w/ threads, dynamic library"
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depends on BR2_USE_MMU
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depends on BR2_STATIC_LIBS || !BR2_TOOLCHAIN_HAS_THREADS
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