Différences

Ci-dessous, les différences entre deux révisions de la page.

--- tech:notes_lvm [2025/03/24 15:06] – créée - modification externe 127.0.0.1
+++ tech:notes_lvm [2026/06/07 19:12] (Version actuelle) – modification externe 127.0.0.1
@@ Ligne 1: / Ligne 1: @@
+<!DOCTYPE markdown>
+{{tag>Brouillon FS LVM}}
+# Notes LVM
+Voir :
+* [[boot-lvm-grub]]
+* [[lvm_changement_remplacement_de_pv]]
+* [[vm_creation_fs_lvm_a_chaud]]
+* [[snapshot_lvm]]
+lv_attrs
+~~~bash
+man 8 lvs
+~~~
+Extents are the smallest units of space that you can allocate in LVM. Physical extents (PE) and logical extents (LE) has the default size of 4 MiB that you can configure. All extents have the same size. When you create a logical volume (LV) within a VG, LVM allocates physical extents on the PVs
+## Création LVs
+~~~bash
+lvcreate -l 100%FREE -n newlv vg_data
+~~~
+## Script - get size lv_size & vgfree space
+~~~bash
+lvs --readonly --noheadings --nosuffix --units=m /dev/mapper/applivg-lv_plop -o lv_size
+vgs --readonly --noheadings --nosuffix --units=m applivg -o vgfree
+~~~
+## Pb
+~~~
+# pvcreate /dev/sda3
+  Device /dev/sda3 not found (or ignored by filtering).
+~~~
+~~~
+# pvcreate -vvv /dev/sda3 2>&1 | grep '/dev/sda3'
+        /dev/sda3: Skipping: Too small to hold a PV
+~~~
+## Tags
+~~~bash
+vgchange --deltag T9 --deltag T10 --addtag T13 --addtag T14 grant
+pvs -o pv_tags /dev/sda2
+vgs -o vg_tags /dev/VolGroup00
+lvs -o lv_tags /dev/VolGroup00/LogVol00
+~~~
+Use the following command to list all the logical volumes with the database tag
+~~~bash
+lvs @database
+~~~
+Use the following command to list the currently active host tags
+~~~bash
+lvm tags
+~~~
+## Autres
+Resize the PV when some data was allocated at the end of the LVM.
+~~~bash
+pvs -v --segments /dev/sda5
+pvmove --alloc anywhere /dev/sda5:yyyy-end
+pvs -v --segments /dev/sda5
+~~~