use listings for file contents

[pve-docs.git] / local-zfs.adoc

diff --git a/local-zfs.adoc b/local-zfs.adoc
index a20903f9af8a5fb951cd2abd12e77823dbb6764b..9b682b9b09e51d1ebee2562d7054a57e98d719c0 100644 (file)
--- a/local-zfs.adoc
+++ b/local-zfs.adoc
@@ -5,11 +5,11 @@ include::attributes.txt[]
 ZFS is a combined file system and logical volume manager designed by
 Sun Microsystems. Starting with {pve} 3.4, the native Linux
 kernel port of the ZFS file system is introduced as optional
-file-system and also as an additional selection for the root
-file-system. There is no need for manually compile ZFS modules - all
+file system and also as an additional selection for the root
+file system. There is no need for manually compile ZFS modules - all
 packages are included.
 
-By using ZFS, its possible to achieve maximal enterprise features with
+By using ZFS, its possible to achieve maximum enterprise features with
 low budget hardware, but also high performance systems by leveraging
 SSD caching or even SSD only setups. ZFS can replace cost intense
 hardware raid cards by moderate CPU and memory load combined with easy
@@ -23,7 +23,7 @@ management.
 
 * Protection against data corruption
 
-* Data compression on file-system level
+* Data compression on file system level
 
 * Snapshots
 
@@ -61,7 +61,7 @@ If you use a dedicated cache and/or log disk, you should use a
 enterprise class SSD (e.g. Intel SSD DC S3700 Series). This can
 increase the overall performance significantly.
 
-IMPORTANT: Do not use ZFS on top of hardware controller which has it's
+IMPORTANT: Do not use ZFS on top of hardware controller which has its
 own cache management. ZFS needs to directly communicate with disks. An
 HBA adapter is the way to go, or something like LSI controller flashed
 in ``IT'' mode.
@@ -72,7 +72,7 @@ since they are not supported by ZFS. Use IDE or SCSI instead (works
 also with `virtio` SCSI controller type).
 
 
-Installation as root file system
+Installation as Root File System
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 When you install using the {pve} installer, you can choose ZFS for the
@@ -158,7 +158,7 @@ GRUB boot loader there. If you use a redundant RAID setup, it installs
 the boot loader on all disk required for booting. So you can boot
 even if some disks fail.
 
-NOTE: It is not possible to use ZFS as root partition with UEFI
+NOTE: It is not possible to use ZFS as root file system with UEFI
 boot.
 
 
@@ -175,7 +175,7 @@ manual pages, which can be read with:
 # man zfs
 -----
 
-.Create a new ZPool
+.Create a new zpool
 
 To create a new pool, at least one disk is needed. The `ashift` should
 have the same sector-size (2 power of `ashift`) or larger as the
@@ -183,7 +183,7 @@ underlying disk.
 
  zpool create -f -o ashift=12 <pool> <device>
 
-To activate the compression 
+To activate compression
 
  zfs set compression=lz4 <pool>
 
@@ -217,7 +217,7 @@ Minimum 4 Disks
 
  zpool create -f -o ashift=12 <pool> raidz2 <device1> <device2> <device3> <device4>
 
-.Create a new pool with Cache (L2ARC)
+.Create a new pool with cache (L2ARC)
 
 It is possible to use a dedicated cache drive partition to increase
 the performance (use SSD).
@@ -227,7 +227,7 @@ As `<device>` it is possible to use more devices, like it's shown in
 
  zpool create -f -o ashift=12 <pool> <device> cache <cache_device>
 
-.Create a new pool with Log (ZIL)
+.Create a new pool with log (ZIL)
 
 It is possible to use a dedicated cache drive partition to increase
 the performance(SSD).
@@ -237,20 +237,20 @@ As `<device>` it is possible to use more devices, like it's shown in
 
  zpool create -f -o ashift=12 <pool> <device> log <log_device>
 
-.Add Cache and Log to an existing pool
+.Add cache and log to an existing pool
 
 If you have an pool without cache and log. First partition the SSD in
 2 partition with `parted` or `gdisk`
 
-IMPORTANT: Always use GPT partition tables (gdisk or parted).
+IMPORTANT: Always use GPT partition tables.
 
 The maximum size of a log device should be about half the size of
 physical memory, so this is usually quite small. The rest of the SSD
-can be used to the cache.
+can be used as cache.
 
  zpool add -f <pool> log <device-part1> cache <device-part2> 
 
-.Changing a failed Device
+.Changing a failed device
 
  zpool replace -f <pool> <old device> <new-device>
 
@@ -259,13 +259,15 @@ Activate E-Mail Notification
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 ZFS comes with an event daemon, which monitors events generated by the
-ZFS kernel module. The daemon can also send E-Mails on ZFS event like
+ZFS kernel module. The daemon can also send emails on ZFS events like
 pool errors.
 
 To activate the daemon it is necessary to edit `/etc/zfs/zed.d/zed.rc` with your
 favourite editor, and uncomment the `ZED_EMAIL_ADDR` setting:
 
+--------
 ZED_EMAIL_ADDR="root"
+--------
 
 Please note {pve} forwards mails to `root` to the email address
 configured for the root user.
@@ -274,22 +276,24 @@ IMPORTANT: The only setting that is required is `ZED_EMAIL_ADDR`. All
 other settings are optional.
 
 
-Limit ZFS memory usage
+Limit ZFS Memory Usage
 ~~~~~~~~~~~~~~~~~~~~~~
 
-It is good to use maximal 50 percent (which is the default) of the
+It is good to use at most 50 percent (which is the default) of the
 system memory for ZFS ARC to prevent performance shortage of the
 host. Use your preferred editor to change the configuration in
 `/etc/modprobe.d/zfs.conf` and insert:
 
- options zfs zfs_arc_max=8589934592
+--------
+options zfs zfs_arc_max=8589934592
+--------
 
 This example setting limits the usage to 8GB.
 
 [IMPORTANT]
 ====
-If your root fs is ZFS you must update your initramfs every
-time this value changes.
+If your root file system is ZFS you must update your initramfs every
+time this value changes:
 
  update-initramfs -u
 ====
@@ -310,7 +314,9 @@ run into low memory situations. Additionally, you can lower the
 To make the swappiness persistent, open `/etc/sysctl.conf` with
 an editor of your choice and add the following line:
 
- vm.swappiness = 10
+--------
+vm.swappiness = 10
+--------
 
 .Linux kernel `swappiness` parameter values
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