Searching for Device Mapper Snapshot Support information? Find all needed info by using official links provided below.
https://www.kernel.org/doc/html/latest/admin-guide/device-mapper/snapshot.html
Device-mapper snapshot support¶ Device-mapper allows you, without massive data copying: To create snapshots of any block device i.e. mountable, saved states of the block device which are also writable without interfering with the original content; To create device “forks”, i.e. multiple different versions of the same data stream.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/logical_volume_manager_administration/device_mapper
Device Mapper Support for the udev Device Manager. ... The Device Mapper is a kernel driver that provides a framework for volume management. It provides a generic way of creating mapped devices, which may be used as logical volumes. ... This snapshot device is persistent across reboots and the chunk size for the data stored on the COW device is ...
https://www.kernel.org/doc/html/latest/admin-guide/device-mapper/index.html
Device-mapper snapshot support; DM statistics; dm-stripe; dm-switch; Thin provisioning; Device-mapper “unstriped” target; dm-verity; Writecache target; dm-zero; The EFI Boot Stub; ext4 General Information; gpio; Notes on the change from 16-bit UIDs to 32-bit UIDs; Linux support for random number generator in i8xx chipsets; Using the initial ...
https://serverfault.com/questions/505653/multi-generation-snapshots-using-device-mapper-linux
LVM is an amazingly useful tool, however, it seems to still lack support for snapshotting a drive that is already a snapshot. I made a script to handle this automatically but ran into some troubles.
https://www.mjmwired.net/kernel/Documentation/device-mapper/snapshot.txt
1 Device-mapper snapshot support 2 ===== 3 4 Device-mapper allows you, without massive data copying: 5 6 *) To create snapshots of any block device i.e. mountable, saved states of 7 the block device which are also writable without interfering with the 8 original content; 9 *) To create device "forks", i.e. multiple different versions of the 10 ...
https://www.suse.com/support/kb/doc/?id=7010069
SLES10SP4 certain LVM actions report device-mapper targets not detected in kernel. ... snapshot: Required device-mapper target(s) not detected in your kernel. Please see the additional information section for a successful run of creating a snapshot device. Resolution.
https://help.onapp.com/hc/en-us/articles/222044528-How-to-remove-backup-snapshots-and-not-get-LVM-I-O-error-
Question How do I remove backup snapshots on a hypervisor without getting an LVM I/O error? Environment All OnApp versions LVM Datastore Answer First, …
https://community.oracle.com/thread/2450526
Oct 09, 2012 · Hello, I learned from a previous thread here that BtrFS should not be put on a LVM volume as both provide similar technologies that compete with each other. What about Device Mapper (DM) and BtrFS under Oracle Linux 6.3? I guess both share similar technologies as well, like Snapshot. Albeit DM is probably less sophisticated.
https://en.wikipedia.org/wiki/Device_mapper
The device mapper is a framework provided by the Linux kernel for mapping physical block devices onto higher-level virtual block devices.It forms the foundation of the logical volume manager (LVM), software RAIDs and dm-crypt disk encryption, and offers additional features such as file system snapshots.. Device mapper works by passing data from a virtual block device, which is provided by the ...
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