[pve-devel] [PATCH pve-docs v2] Add subchapter about ACLs, and make even more clear what quotas are about
e.kasper at proxmox.com
Tue Apr 12 15:13:18 CEST 2016
Document that use of a tmpdir is recommended when doing a 'suspend'
backup to a NFS share.
changes since v1:
* move NFS related hints to vzdump documentation, recommend tmpdir
* reword quota description
pct.adoc | 8 ++++++++
vzdump.adoc | 14 ++++++++++----
2 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/pct.adoc b/pct.adoc
index 82f257b..1117082 100644
@@ -401,6 +401,8 @@ Similarly device mounts are not managed by the storage, but for these the
Using quotas inside containers
+Quotas allow to set limits inside a container for the amount of disk space
+that each user can use.
This only works on ext4 image based storage types and currently does not work
with unprivileged containers.
@@ -418,6 +420,12 @@ for every mountpoint by passing the mountpoint's path instead of just `/`.) Best
see the documentation specific to the distributiont running inside the
+Using ACLs inside containers
+The standard Posix Access Control Lists are also available inside containers.
+ACLs allow you to set more detailed file ownership than the traditional user/
diff --git a/vzdump.adoc b/vzdump.adoc
index fc42468..77f4638 100644
@@ -38,11 +38,17 @@ Stop the VM during backup. This results in a very long downtime.
-For containers, this mode uses rsync to copy the VM data to a temporary
-location (see option `--tmpdir`). Then the VM is suspended and a second
-rsync copies changed files. After that, the VM is started (resumed)
+For containers, this mode uses rsync to copy the container data to a temporary
+location (see option `--tmpdir`). Then the container is suspended and a second
+rsync copies changed files. After that, the container is started (resumed)
again. This results in minimal downtime, but needs additional space
-to hold the VM copy.
+to hold the container copy.
+When the container is on a local filesystem and the target storage of the backup
+is an NFS server, you should set `--tmpdir` to reside on a local filesystem too,
+as this will result in a many fold performance improvement.
+Use of a local `tmpdir` is also required if you want to backup in `suspend`
+mode a local container using ACLs to an NFS server.
For QemuServer, this mode will suspend the VM, start
a live backup, and resume the VM.
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