The branch, master has been updated
via 66e05500b6e5c8fa5efbcba4447e488dd4232897 (commit)
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- Log -----------------------------------------------------------------
commit 66e05500b6e5c8fa5efbcba4447e488dd4232897
Author: Ronnie sahlberg <[email protected]>
Date: Thu May 20 11:44:18 2010 +1000
document how to restore a backup into a different database
-----------------------------------------------------------------------
Summary of changes:
doc/ctdb.1 | 10 ++--
doc/ctdb.1.html | 155 ++++++++++++++++++++++++++++---------------------------
doc/ctdb.1.xml | 5 ++-
3 files changed, 88 insertions(+), 82 deletions(-)
Changeset truncated at 500 lines:
diff --git a/doc/ctdb.1 b/doc/ctdb.1
index 5e208e4..358f011 100644
--- a/doc/ctdb.1
+++ b/doc/ctdb.1
@@ -1,13 +1,13 @@
'\" t
.\" Title: ctdb
.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
-.\" Generator: DocBook XSL Stylesheets v1.75.1 <http://docbook.sf.net/>
-.\" Date: 02/24/2010
+.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
+.\" Date: 05/20/2010
.\" Manual: CTDB - clustered TDB database
.\" Source: ctdb
.\" Language: English
.\"
-.TH "CTDB" "1" "02/24/2010" "ctdb" "CTDB \- clustered TDB database"
+.TH "CTDB" "1" "05/20/2010" "ctdb" "CTDB \- clustered TDB database"
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
@@ -767,9 +767,9 @@ By default, this operation is issued from the 00\&.ctdb
event script every 5 min
.SS "backupdb <dbname> <file>"
.PP
This command can be used to copy the entire content of a database out to a
file\&. This file can later be read back into ctdb using the restoredb
command\&. This is mainly useful for backing up persistent databases such as
secrets\&.tdb and similar\&.
-.SS "restoredb <file>"
+.SS "restoredb <file> [dbname]"
.PP
-This command restores a persistent database that was previously backed up
using backupdb\&.
+This command restores a persistent database that was previously backed up
using backupdb\&. By default the data will be restored back into the same
database as it was created from\&. By specifying dbname you can restore the
data into a different database\&.
.SS "wipedb <dbname>"
.PP
This command can be used to remove all content of a database\&.
diff --git a/doc/ctdb.1.html b/doc/ctdb.1.html
index 806889d..701b0dd 100644
--- a/doc/ctdb.1.html
+++ b/doc/ctdb.1.html
@@ -1,6 +1,6 @@
-<html><head><meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1"><title>ctdb</title><meta name="generator" content="DocBook
XSL Stylesheets V1.75.1"></head><body bgcolor="white" text="black"
link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry"
title="ctdb"><a name="ctdb.1"></a><div class="titlepage"></div><div
class="refnamediv"><h2>Name</h2><p>ctdb — clustered tdb database
management utility</p></div><div class="refsynopsisdiv"
title="Synopsis"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code
class="command">ctdb [ OPTIONS ] COMMAND ...</code> </p></div><div
class="cmdsynopsis"><p><code class="command">ctdb</code> [-n <node>]
[-Y] [-t <timeout>] [-T <timelimit>] [-? --help] [--usage] [-d
--debug=<INTEGER>] [--socket=<filename>]</p></div></div><div
class="refsect1" title="DESCRIPTION"><a
name="id399724"></a><h2>DESCRIPTION</h2><p>
+<html><head><meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1"><title>ctdb</title><meta name="generator" content="DocBook
XSL Stylesheets V1.75.2"></head><body bgcolor="white" text="black"
link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry"
title="ctdb"><a name="ctdb.1"></a><div class="titlepage"></div><div
class="refnamediv"><h2>Name</h2><p>ctdb — clustered tdb database
management utility</p></div><div class="refsynopsisdiv"
title="Synopsis"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code
class="command">ctdb [ OPTIONS ] COMMAND ...</code> </p></div><div
class="cmdsynopsis"><p><code class="command">ctdb</code> [-n <node>]
[-Y] [-t <timeout>] [-T <timelimit>] [-? --help] [--usage] [-d
--debug=<INTEGER>] [--socket=<filename>]</p></div></div><div
class="refsect1" title="DESCRIPTION"><a
name="id2485540"></a><h2>DESCRIPTION</h2><p>
ctdb is a utility to view and manage a ctdb cluster.
- </p></div><div class="refsect1" title="OPTIONS"><a
name="id399733"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span
class="term">-n <pnn></span></dt><dd><p>
+ </p></div><div class="refsect1" title="OPTIONS"><a
name="id2485550"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span
class="term">-n <pnn></span></dt><dd><p>
This specifies the physical node number on which to execute the
command. Default is to run the command on the daemon running on
the local host.
@@ -28,13 +28,13 @@
You only need to specify this parameter if you run multiple ctdb
daemons on the same physical host and thus can not use the default
name for the domain socket.
- </p></dd></dl></div></div><div class="refsect1"
title="Administrative Commands"><a name="id399858"></a><h2>Administrative
Commands</h2><p>
+ </p></dd></dl></div></div><div class="refsect1"
title="Administrative Commands"><a name="id2485687"></a><h2>Administrative
Commands</h2><p>
These are commands used to monitor and administrate a CTDB cluster.
- </p><div class="refsect2" title="pnn"><a
name="id399865"></a><h3>pnn</h3><p>
+ </p><div class="refsect2" title="pnn"><a
name="id2485696"></a><h3>pnn</h3><p>
This command displays the pnn of the current node.
- </p></div><div class="refsect2" title="status"><a
name="id399874"></a><h3>status</h3><p>
+ </p></div><div class="refsect2" title="status"><a
name="id2485706"></a><h3>status</h3><p>
This command shows the current status of the ctdb node.
- </p><div class="refsect3" title="node status"><a
name="id399882"></a><h4>node status</h4><p>
+ </p><div class="refsect3" title="node status"><a
name="id2485715"></a><h4>node status</h4><p>
Node status reflects the current status of the node. There are five
possible states:
</p><p>
OK - This node is fully functional.
@@ -57,7 +57,7 @@
in a cluster like a node that is ok. Some interfaces to serve
public ip addresses are down, but at least one interface is up.
See also "ctdb ifaces".
- </p></div><div class="refsect3" title="generation"><a
name="id399931"></a><h4>generation</h4><p>
+ </p></div><div class="refsect3" title="generation"><a
name="id2485783"></a><h4>generation</h4><p>
The generation id is a number that indicates the current generation
of a cluster instance. Each time a cluster goes through a
reconfiguration or a recovery its generation id will be changed.
@@ -78,10 +78,10 @@
All nodes start with generation "INVALID" and are not assigned a real
generation id until they have successfully been merged with a cluster
through a recovery.
- </p></div><div class="refsect3" title="VNNMAP"><a
name="id399957"></a><h4>VNNMAP</h4><p>
+ </p></div><div class="refsect3" title="VNNMAP"><a
name="id2538082"></a><h4>VNNMAP</h4><p>
The list of Virtual Node Numbers. This is a list of all nodes that
actively participates in the cluster and that share the workload of hosting the
Clustered TDB database records.
Only nodes that are participating in the vnnmap can become lmaster
or dmaster for a database record.
- </p></div><div class="refsect3" title="Recovery mode"><a
name="id399968"></a><h4>Recovery mode</h4><p>
+ </p></div><div class="refsect3" title="Recovery mode"><a
name="id2538096"></a><h4>Recovery mode</h4><p>
This is the current recovery mode of the cluster. There are two
possible modes:
</p><p>
NORMAL - The cluster is fully operational.
@@ -101,7 +101,7 @@
have been recovered, the node mode will change into NORMAL mode
and the databases will be "thawed", allowing samba to access the
databases again.
- </p></div><div class="refsect3" title="Recovery master"><a
name="id400000"></a><h4>Recovery master</h4><p>
+ </p></div><div class="refsect3" title="Recovery master"><a
name="id2538138"></a><h4>Recovery master</h4><p>
This is the cluster node that is currently designated as the
recovery master. This node is responsible of monitoring the consistency of the
cluster and to perform the actual recovery process when reqired.
</p><p>
Only one node at a time can be the designated recovery master. Which
@@ -123,9 +123,9 @@ hash:2 lmaster:2
hash:3 lmaster:3
Recovery mode:NORMAL (0)
Recovery master:0
- </pre></div><div class="refsect2" title="recmaster"><a
name="id400032"></a><h3>recmaster</h3><p>
+ </pre></div><div class="refsect2" title="recmaster"><a
name="id2538176"></a><h3>recmaster</h3><p>
This command shows the pnn of the node which is currently the
recmaster.
- </p></div><div class="refsect2" title="uptime"><a
name="id400042"></a><h3>uptime</h3><p>
+ </p></div><div class="refsect2" title="uptime"><a
name="id2538184"></a><h3>uptime</h3><p>
This command shows the uptime for the ctdb daemon. When the last
recovery or ip-failover completed and how long it took. If the "duration" is
shown as a negative number, this indicates that there is a recovery/failover in
progress and it started that many seconds ago.
</p><p>
Example: ctdb uptime
@@ -134,7 +134,7 @@ Current time of node : Thu Oct 29
10:38:54 2009
Ctdbd start time : (000 16:54:28) Wed Oct 28 17:44:26 2009
Time of last recovery/failover: (000 16:53:31) Wed Oct 28 17:45:23 2009
Duration of last recovery/failover: 2.248552 seconds
- </pre></div><div class="refsect2" title="listnodes"><a
name="id400068"></a><h3>listnodes</h3><p>
+ </pre></div><div class="refsect2" title="listnodes"><a
name="id2538215"></a><h3>listnodes</h3><p>
This command shows lists the ip addresses of all the nodes in the
cluster.
</p><p>
Example: ctdb listnodes
@@ -143,7 +143,7 @@ Duration of last recovery/failover: 2.248552 seconds
10.0.0.72
10.0.0.73
10.0.0.74
- </pre></div><div class="refsect2" title="ping"><a
name="id400090"></a><h3>ping</h3><p>
+ </pre></div><div class="refsect2" title="ping"><a
name="id2538239"></a><h3>ping</h3><p>
This command will "ping" all CTDB daemons in the cluster to verify
that they are processing commands correctly.
</p><p>
Example: ctdb ping
@@ -154,7 +154,7 @@ response from 0 time=0.000054 sec (3 clients)
response from 1 time=0.000144 sec (2 clients)
response from 2 time=0.000105 sec (2 clients)
response from 3 time=0.000114 sec (2 clients)
- </pre></div><div class="refsect2" title="ifaces"><a
name="id400114"></a><h3>ifaces</h3><p>
+ </pre></div><div class="refsect2" title="ifaces"><a
name="id2538265"></a><h3>ifaces</h3><p>
This command will display the list of network interfaces, which could
host public addresses, along with their status.
</p><p>
@@ -177,13 +177,13 @@ name:eth2 link:up references:1
:eth4:0:0
:eth3:1:1
:eth2:1:1
- </pre></div><div class="refsect2" title="setifacelink <iface>
<status>"><a name="id400151"></a><h3>setifacelink <iface>
<status></h3><p>
+ </pre></div><div class="refsect2" title="setifacelink <iface>
<status>"><a name="id2538305"></a><h3>setifacelink <iface>
<status></h3><p>
This command will set the status of a network interface.
The status needs to be "up" or "down". This is typically
used in the 10.interfaces script in the "monitor" event.
</p><p>
Example: ctdb setifacelink eth0 up
- </p></div><div class="refsect2" title="ip"><a
name="id400165"></a><h3>ip</h3><p>
+ </p></div><div class="refsect2" title="ip"><a
name="id2538321"></a><h3>ip</h3><p>
This command will display the list of public addresses that are
provided by the cluster and which physical node is currently serving this ip.
By default this command will ONLY show those public addresses that are known to
the node itself. To see the full list of all public ips across the cluster you
must use "ctdb ip -n all".
</p><p>
Example: ctdb ip
@@ -213,7 +213,7 @@ Public IPs on node 0
:172.31.92.83:0:eth5:eth5:eth4,eth5:
:172.31.92.84:1::eth5:eth4,eth5:
:172.31.92.85:0:eth5:eth5:eth4,eth5:
- </pre></div><div class="refsect2" title="ipinfo <ip>"><a
name="id400210"></a><h3>ipinfo <ip></h3><p>
+ </pre></div><div class="refsect2" title="ipinfo <ip>"><a
name="id2538376"></a><h3>ipinfo <ip></h3><p>
This command will display details about the specified public addresses.
</p><p>
Example: ctdb ipinfo 172.31.92.85
@@ -226,7 +226,7 @@ CurrentNode:0
NumInterfaces:2
Interface[1]: Name:eth4 Link:down References:0
Interface[2]: Name:eth5 Link:up References:2 (active)
- </pre></div><div class="refsect2" title="scriptstatus"><a
name="id356879"></a><h3>scriptstatus</h3><p>
+ </pre></div><div class="refsect2" title="scriptstatus"><a
name="id2538403"></a><h3>scriptstatus</h3><p>
This command displays which scripts where run in the previous
monitoring cycle and the result of each script. If a script failed with an
error, causing the node to become unhealthy, the output from that script is
also shown.
</p><p>
Example: ctdb scriptstatus
@@ -243,15 +243,15 @@ Interface[2]: Name:eth5 Link:up References:2 (active)
41.httpd Status:OK Duration:0.039 Tue Mar 24 18:56:57 2009
50.samba Status:ERROR Duration:0.082 Tue Mar 24 18:56:57 2009
OUTPUT:ERROR: Samba tcp port 445 is not responding
- </pre></div><div class="refsect2" title="disablescript
<script>"><a name="id356909"></a><h3>disablescript <script></h3><p>
+ </pre></div><div class="refsect2" title="disablescript
<script>"><a name="id2538439"></a><h3>disablescript <script></h3><p>
This command is used to disable an eventscript.
</p><p>
This will take effect the next time the eventscripts are being executed
so it can take a short while until this is reflected in 'scriptstatus'.
- </p></div><div class="refsect2" title="enablescript <script>"><a
name="id356922"></a><h3>enablescript <script></h3><p>
+ </p></div><div class="refsect2" title="enablescript <script>"><a
name="id2538455"></a><h3>enablescript <script></h3><p>
This command is used to enable an eventscript.
</p><p>
This will take effect the next time the eventscripts are being executed
so it can take a short while until this is reflected in 'scriptstatus'.
- </p></div><div class="refsect2" title="getvar <name>"><a
name="id356936"></a><h3>getvar <name></h3><p>
+ </p></div><div class="refsect2" title="getvar <name>"><a
name="id2538471"></a><h3>getvar <name></h3><p>
Get the runtime value of a tuneable variable.
</p><p>
Example: ctdb getvar MaxRedirectCount
@@ -259,11 +259,11 @@ Interface[2]: Name:eth5 Link:up References:2 (active)
Example output:
</p><pre class="screen">
MaxRedirectCount = 3
- </pre></div><div class="refsect2" title="setvar <name>
<value>"><a name="id356957"></a><h3>setvar <name>
<value></h3><p>
+ </pre></div><div class="refsect2" title="setvar <name>
<value>"><a name="id2538494"></a><h3>setvar <name>
<value></h3><p>
Set the runtime value of a tuneable variable.
</p><p>
Example: ctdb setvar MaxRedirectCount 5
- </p></div><div class="refsect2" title="listvars"><a
name="id356970"></a><h3>listvars</h3><p>
+ </p></div><div class="refsect2" title="listvars"><a
name="id2538509"></a><h3>listvars</h3><p>
List all tuneable variables.
</p><p>
Example: ctdb listvars
@@ -312,7 +312,7 @@ VacuumMaxInterval = 600
MaxQueueDropMsg = 1000
UseStatusEvents = 0
AllowUnhealthyDBRead = 0
- </pre></div><div class="refsect2" title="lvsmaster"><a
name="id357000"></a><h3>lvsmaster</h3><p>
+ </pre></div><div class="refsect2" title="lvsmaster"><a
name="id2538549"></a><h3>lvsmaster</h3><p>
This command shows which node is currently the LVSMASTER. The
LVSMASTER is the node in the cluster which drives the LVS system and
which receives all incoming traffic from clients.
@@ -323,7 +323,7 @@ AllowUnhealthyDBRead = 0
evenly onto the other nodes in the cluster. This is an alternative to
using
public ip addresses. See the manpage for ctdbd for more information
about LVS.
- </p></div><div class="refsect2" title="lvs"><a
name="id357018"></a><h3>lvs</h3><p>
+ </p></div><div class="refsect2" title="lvs"><a
name="id2538571"></a><h3>lvs</h3><p>
This command shows which nodes in the cluster are currently active in the
LVS configuration. I.e. which nodes we are currently loadbalancing
the single ip address across.
@@ -338,7 +338,7 @@ AllowUnhealthyDBRead = 0
</p><pre class="screen">
2:10.0.0.13
3:10.0.0.14
- </pre></div><div class="refsect2" title="getcapabilities"><a
name="id357044"></a><h3>getcapabilities</h3><p>
+ </pre></div><div class="refsect2" title="getcapabilities"><a
name="id2538601"></a><h3>getcapabilities</h3><p>
This command shows the capabilities of the current node.
Please see manpage for ctdbd for a full list of all capabilities and
more detailed description.
@@ -357,7 +357,7 @@ AllowUnhealthyDBRead = 0
RECMASTER: YES
LMASTER: YES
LVS: NO
- </pre></div><div class="refsect2" title="statistics"><a
name="id357074"></a><h3>statistics</h3><p>
+ </pre></div><div class="refsect2" title="statistics"><a
name="id2538638"></a><h3>statistics</h3><p>
Collect statistics from the CTDB daemon about how many calls it has
served.
</p><p>
Example: ctdb statistics
@@ -399,23 +399,23 @@ CTDB version 1
max_hop_count 0
max_call_latency 4.948321 sec
max_lockwait_latency 0.000000 sec
- </pre></div><div class="refsect2" title="statisticsreset"><a
name="id357107"></a><h3>statisticsreset</h3><p>
+ </pre></div><div class="refsect2" title="statisticsreset"><a
name="id2538681"></a><h3>statisticsreset</h3><p>
This command is used to clear all statistics counters in a node.
</p><p>
Example: ctdb statisticsreset
- </p></div><div class="refsect2" title="getreclock"><a
name="id357119"></a><h3>getreclock</h3><p>
+ </p></div><div class="refsect2" title="getreclock"><a
name="id2538695"></a><h3>getreclock</h3><p>
This command is used to show the filename of the reclock file that is
used.
</p><p>
Example output:
</p><pre class="screen">
Reclock file:/gpfs/.ctdb/shared
- </pre></div><div class="refsect2" title="setreclock [filename]"><a
name="id357137"></a><h3>setreclock [filename]</h3><p>
+ </pre></div><div class="refsect2" title="setreclock [filename]"><a
name="id2538715"></a><h3>setreclock [filename]</h3><p>
This command is used to modify, or clear, the file that is used as the
reclock file at runtime. When this command is used, the reclock file checks are
disabled. To re-enable the checks the administrator needs to activate the
"VerifyRecoveryLock" tunable using "ctdb setvar".
</p><p>
If run with no parameter this will remove the reclock file completely.
If run with a parameter the parameter specifies the new filename to use for the
recovery lock.
</p><p>
This command only affects the runtime settings of a ctdb node and will
be lost when ctdb is restarted. For persistent changes to the reclock file
setting you must edit /etc/sysconfig/ctdb.
- </p></div><div class="refsect2" title="getdebug"><a
name="id357158"></a><h3>getdebug</h3><p>
+ </p></div><div class="refsect2" title="getdebug"><a
name="id2538742"></a><h3>getdebug</h3><p>
Get the current debug level for the node. the debug level controls
what information is written to the log file.
</p><p>
The debug levels are mapped to the corresponding syslog levels.
@@ -425,42 +425,42 @@ Reclock file:/gpfs/.ctdb/shared
The list of debug levels from highest to lowest are :
</p><p>
EMERG ALERT CRIT ERR WARNING NOTICE INFO DEBUG
- </p></div><div class="refsect2" title="setdebug <debuglevel>"><a
name="id357180"></a><h3>setdebug <debuglevel></h3><p>
+ </p></div><div class="refsect2" title="setdebug <debuglevel>"><a
name="id2538767"></a><h3>setdebug <debuglevel></h3><p>
Set the debug level of a node. This controls what information will be
logged.
</p><p>
The debuglevel is one of EMERG ALERT CRIT ERR WARNING NOTICE INFO DEBUG
- </p></div><div class="refsect2" title="getpid"><a
name="id357193"></a><h3>getpid</h3><p>
+ </p></div><div class="refsect2" title="getpid"><a
name="id2538783"></a><h3>getpid</h3><p>
This command will return the process id of the ctdb daemon.
- </p></div><div class="refsect2" title="disable"><a
name="id357201"></a><h3>disable</h3><p>
+ </p></div><div class="refsect2" title="disable"><a
name="id2538793"></a><h3>disable</h3><p>
This command is used to administratively disable a node in the cluster.
A disabled node will still participate in the cluster and host
clustered TDB records but its public ip address has been taken over by
a different node and it no longer hosts any services.
- </p></div><div class="refsect2" title="enable"><a
name="id357213"></a><h3>enable</h3><p>
+ </p></div><div class="refsect2" title="enable"><a
name="id2538807"></a><h3>enable</h3><p>
Re-enable a node that has been administratively disabled.
- </p></div><div class="refsect2" title="stop"><a
name="id357222"></a><h3>stop</h3><p>
+ </p></div><div class="refsect2" title="stop"><a
name="id2538817"></a><h3>stop</h3><p>
This command is used to administratively STOP a node in the cluster.
A STOPPED node is connected to the cluster but will not host any
public ip addresse, nor does it participate in the VNNMAP.
The difference between a DISABLED node and a STOPPED node is that
a STOPPED node does not host any parts of the database which means
that a recovery is required to stop/continue nodes.
- </p></div><div class="refsect2" title="continue"><a
name="id357234"></a><h3>continue</h3><p>
+ </p></div><div class="refsect2" title="continue"><a
name="id2538833"></a><h3>continue</h3><p>
Re-start a node that has been administratively stopped.
- </p></div><div class="refsect2" title="addip <public_ip/mask>
<iface>"><a name="id357243"></a><h3>addip <public_ip/mask>
<iface></h3><p>
+ </p></div><div class="refsect2" title="addip <public_ip/mask>
<iface>"><a name="id2538843"></a><h3>addip <public_ip/mask>
<iface></h3><p>
This command is used to add a new public ip to a node during runtime.
This allows public addresses to be added to a cluster without having
to restart the ctdb daemons.
</p><p>
Note that this only updates the runtime instance of ctdb. Any changes
will be lost next time ctdb is restarted and the public addresses file is
re-read.
If you want this change to be permanent you must also update the public
addresses file manually.
- </p></div><div class="refsect2" title="delip <public_ip>"><a
name="id357259"></a><h3>delip <public_ip></h3><p>
+ </p></div><div class="refsect2" title="delip <public_ip>"><a
name="id2538863"></a><h3>delip <public_ip></h3><p>
This command is used to remove a public ip from a node during runtime.
If this public ip is currently hosted by the node it being removed
from, the ip will first be failed over to another node, if possible, before it
is removed.
</p><p>
Note that this only updates the runtime instance of ctdb. Any changes
will be lost next time ctdb is restarted and the public addresses file is
re-read.
If you want this change to be permanent you must also update the public
addresses file manually.
- </p></div><div class="refsect2" title="moveip <public_ip>
<node>"><a name="id357276"></a><h3>moveip <public_ip>
<node></h3><p>
+ </p></div><div class="refsect2" title="moveip <public_ip>
<node>"><a name="id2538884"></a><h3>moveip <public_ip>
<node></h3><p>
This command can be used to manually fail a public ip address to a
specific node.
</p><p>
@@ -471,14 +471,14 @@ Reclock file:/gpfs/.ctdb/shared
DeterministicIPs = 0
</p><p>
NoIPFailback = 1
- </p></div><div class="refsect2" title="shutdown"><a
name="id357298"></a><h3>shutdown</h3><p>
+ </p></div><div class="refsect2" title="shutdown"><a
name="id2538909"></a><h3>shutdown</h3><p>
This command will shutdown a specific CTDB daemon.
- </p></div><div class="refsect2" title="recover"><a
name="id357307"></a><h3>recover</h3><p>
+ </p></div><div class="refsect2" title="recover"><a
name="id2538919"></a><h3>recover</h3><p>
This command will trigger the recovery daemon to do a cluster
recovery.
- </p></div><div class="refsect2" title="ipreallocate"><a
name="id357316"></a><h3>ipreallocate</h3><p>
+ </p></div><div class="refsect2" title="ipreallocate"><a
name="id2538929"></a><h3>ipreallocate</h3><p>
This command will force the recovery master to perform a full ip
reallocation process and redistribute all ip addresses. This is useful to
"reset" the allocations back to its default state if they have been changed
using the "moveip" command. While a "recover" will also perform this
reallocation, a recovery is much more hevyweight since it will also rebuild all
the databases.
- </p></div><div class="refsect2" title="setlmasterrole <on|off>"><a
name="id357329"></a><h3>setlmasterrole <on|off></h3><p>
+ </p></div><div class="refsect2" title="setlmasterrole <on|off>"><a
name="id2538945"></a><h3>setlmasterrole <on|off></h3><p>
This command is used ot enable/disable the LMASTER capability for a
node at runtime. This capability determines whether or not a node can be used
as an LMASTER for records in the database. A node that does not have the
LMASTER capability will not show up in the vnnmap.
</p><p>
Nodes will by default have this capability, but it can be stripped off
nodes by the setting in the sysconfig file or by using this command.
@@ -486,21 +486,21 @@ Reclock file:/gpfs/.ctdb/shared
Once this setting has been enabled/disabled, you need to perform a
recovery for it to take effect.
</p><p>
See also "ctdb getcapabilities"
- </p></div><div class="refsect2" title="setrecmasterrole
<on|off>"><a name="id357352"></a><h3>setrecmasterrole
<on|off></h3><p>
+ </p></div><div class="refsect2" title="setrecmasterrole
<on|off>"><a name="id2538974"></a><h3>setrecmasterrole
<on|off></h3><p>
This command is used ot enable/disable the RECMASTER capability for a
node at runtime. This capability determines whether or not a node can be used
as an RECMASTER for the cluster. A node that does not have the RECMASTER
capability can not win a recmaster election. A node that already is the
recmaster for the cluster when the capability is stripped off the node will
remain the recmaster until the next cluster election.
</p><p>
Nodes will by default have this capability, but it can be stripped off
nodes by the setting in the sysconfig file or by using this command.
</p><p>
See also "ctdb getcapabilities"
- </p></div><div class="refsect2" title="killtcp <srcip:port>
<dstip:port>"><a name="id357372"></a><h3>killtcp <srcip:port>
<dstip:port></h3><p>
+ </p></div><div class="refsect2" title="killtcp <srcip:port>
<dstip:port>"><a name="id2539000"></a><h3>killtcp <srcip:port>
<dstip:port></h3><p>
This command will kill the specified TCP connection by issuing a
TCP RST to the srcip:port endpoint. This is a command used by the
ctdb eventscripts.
- </p></div><div class="refsect2" title="gratiousarp <ip>
<interface>"><a name="id357383"></a><h3>gratiousarp <ip>
<interface></h3><p>
+ </p></div><div class="refsect2" title="gratiousarp <ip>
<interface>"><a name="id2539013"></a><h3>gratiousarp <ip>
<interface></h3><p>
This command will send out a gratious arp for the specified interface
through the specified interface. This command is mainly used by the
ctdb eventscripts.
- </p></div><div class="refsect2" title="reloadnodes"><a
name="id357394"></a><h3>reloadnodes</h3><p>
+ </p></div><div class="refsect2" title="reloadnodes"><a
name="id2539025"></a><h3>reloadnodes</h3><p>
This command is used when adding new nodes, or removing existing nodes
from an existing cluster.
</p><p>
Procedure to add a node:
@@ -534,7 +534,7 @@ Reclock file:/gpfs/.ctdb/shared
</p><p>
5, Use 'ctdb status' on all nodes and verify that the deleted node no
longer shows up in the list..
</p><p>
- </p></div><div class="refsect2" title="tickle <srcip:port>
<dstip:port>"><a name="id357460"></a><h3>tickle <srcip:port>
<dstip:port></h3><p>
+ </p></div><div class="refsect2" title="tickle <srcip:port>
<dstip:port>"><a name="id2539109"></a><h3>tickle <srcip:port>
<dstip:port></h3><p>
This command will will send a TCP tickle to the source host for the
specified TCP connection.
A TCP tickle is a TCP ACK packet with an invalid sequence and
@@ -546,10 +546,10 @@ Reclock file:/gpfs/.ctdb/shared
TCP connection has been disrupted and that the client will need
to reestablish. This greatly speeds up the time it takes for a client
to detect and reestablish after an IP failover in the ctdb cluster.
- </p></div><div class="refsect2" title="gettickles <ip>"><a
name="id357478"></a><h3>gettickles <ip></h3><p>
+ </p></div><div class="refsect2" title="gettickles <ip>"><a
name="id2539134"></a><h3>gettickles <ip></h3><p>
This command is used to show which TCP connections are registered with
CTDB to be "tickled" if there is a failover.
- </p></div><div class="refsect2" title="repack [max_freelist]"><a
name="id401052"></a><h3>repack [max_freelist]</h3><p>
+ </p></div><div class="refsect2" title="repack [max_freelist]"><a
name="id2539145"></a><h3>repack [max_freelist]</h3><p>
Over time, when records are created and deleted in a TDB, the TDB list
of free space will become fragmented. This can lead to a slowdown in accessing
TDB records.
This command is used to defragment a TDB database and pruning the
freelist.
</p><p>
@@ -564,7 +564,7 @@ Reclock file:/gpfs/.ctdb/shared
Example: ctdb repack 1000
</p><p>
By default, this operation is issued from the 00.ctdb event script
every 5 minutes.
- </p></div><div class="refsect2" title="vacuum [max_records]"><a
name="id401089"></a><h3>vacuum [max_records]</h3><p>
+ </p></div><div class="refsect2" title="vacuum [max_records]"><a
name="id2483662"></a><h3>vacuum [max_records]</h3><p>
Over time CTDB databases will fill up with empty deleted records which
will lead to a progressive slow down of CTDB database access.
This command is used to prune all databases and delete all empty
records from the cluster.
</p><p>
@@ -580,14 +580,17 @@ Reclock file:/gpfs/.ctdb/shared
Example: ctdb vacuum
</p><p>
By default, this operation is issued from the 00.ctdb event script
every 5 minutes.
- </p></div><div class="refsect2" title="backupdb <dbname>
<file>"><a name="id401118"></a><h3>backupdb <dbname>
<file></h3><p>
+ </p></div><div class="refsect2" title="backupdb <dbname>
<file>"><a name="id2483698"></a><h3>backupdb <dbname>
<file></h3><p>
This command can be used to copy the entire content of a database out
to a file. This file can later be read back into ctdb using the restoredb
command.
This is mainly useful for backing up persistent databases such as secrets.tdb
and similar.
- </p></div><div class="refsect2" title="restoredb <file>"><a
name="id401129"></a><h3>restoredb <file></h3><p>
+ </p></div><div class="refsect2" title="restoredb <file>
[dbname]"><a name="id2483712"></a><h3>restoredb <file> [dbname]</h3><p>
This command restores a persistent database that was previously backed
up using backupdb.
- </p></div><div class="refsect2" title="wipedb <dbname>"><a
name="id401139"></a><h3>wipedb <dbname></h3><p>
+ By default the data will be restored back into the same database as
+ it was created from. By specifying dbname you can restore the data
+ into a different database.
+ </p></div><div class="refsect2" title="wipedb <dbname>"><a
name="id2483726"></a><h3>wipedb <dbname></h3><p>
This command can be used to remove all content of a database.
- </p></div></div><div class="refsect2" title="getlog <level>"><a
name="id401148"></a><h3>getlog <level></h3><p>
+ </p></div></div><div class="refsect2" title="getlog <level>"><a
name="id2483738"></a><h3>getlog <level></h3><p>
In addition to the normal loggign to a log file,
CTDBD also keeps a in-memory ringbuffer containing the most recent
log entries for all log levels (except DEBUG).
@@ -600,14 +603,14 @@ This is mainly useful for backing up persistent databases
such as secrets.tdb an
</p><p>
This command extracts all messages of level or lower log level from
memory and prints it to the screen.
- </p></div><div class="refsect2" title="clearlog"><a
name="id401166"></a><h3>clearlog</h3><p>
+ </p></div><div class="refsect2" title="clearlog"><a
name="id2483761"></a><h3>clearlog</h3><p>
This command clears the in-memory logging ringbuffer.
- </p></div><div class="refsect1" title="Debugging Commands"><a
name="id401175"></a><h2>Debugging Commands</h2><p>
+ </p></div><div class="refsect1" title="Debugging Commands"><a
name="id2483771"></a><h2>Debugging Commands</h2><p>
These commands are primarily used for CTDB development and testing and
should not be used for normal administration.
- </p><div class="refsect2" title="process-exists <pid>"><a
name="id401184"></a><h3>process-exists <pid></h3><p>
+ </p><div class="refsect2" title="process-exists <pid>"><a
name="id2483782"></a><h3>process-exists <pid></h3><p>
This command checks if a specific process exists on the CTDB host.
This is mainly used by Samba to check if remote instances of samba are still
running or not.
- </p></div><div class="refsect2" title="getdbmap"><a
name="id401194"></a><h3>getdbmap</h3><p>
+ </p></div><div class="refsect2" title="getdbmap"><a
name="id2483794"></a><h3>getdbmap</h3><p>
This command lists all clustered TDB databases that the CTDB daemon
has attached to. Some databases are flagged as PERSISTENT, this means that the
database stores data persistently and the data will remain across reboots. One
example of such a database is secrets.tdb where information about how the
cluster was joined to the domain is stored.
</p><p>
If a PERSISTENT database is not in a healthy state the database is
@@ -647,7 +650,7 @@ dbid:0xb775fff6 name:secrets.tdb
path:/var/ctdb/persistent/secrets.tdb.0 PERSIST
</p><pre class="screen">
:ID:Name:Path:Persistent:Unhealthy:
:0x7bbbd26c:passdb.tdb:/var/ctdb/persistent/passdb.tdb.0:1:0:
- </pre></div><div class="refsect2" title="getdbstatus <dbname>"><a
name="id401258"></a><h3>getdbstatus <dbname></h3><p>
+ </pre></div><div class="refsect2" title="getdbstatus <dbname>"><a
name="id2483879"></a><h3>getdbstatus <dbname></h3><p>
This command displays more details about a database.
</p><p>
Example: ctdb getdbstatus test.tdb.0
@@ -669,28 +672,28 @@ name: registry.tdb
path: /var/ctdb/persistent/registry.tdb.0
PERSISTENT: yes
HEALTH: NO-HEALTHY-NODES - ERROR - Backup of corrupted TDB in
'/var/ctdb/persistent/registry.tdb.0.corrupted.20091208091949.0Z'
- </pre></div><div class="refsect2" title="catdb <dbname>"><a
name="id401293"></a><h3>catdb <dbname></h3><p>
+ </pre></div><div class="refsect2" title="catdb <dbname>"><a
name="id2483921"></a><h3>catdb <dbname></h3><p>
This command will dump a clustered TDB database to the screen. This is
a debugging command.
- </p></div><div class="refsect2" title="dumpdbbackup
<backup-file>"><a name="id401303"></a><h3>dumpdbbackup
<backup-file></h3><p>
+ </p></div><div class="refsect2" title="dumpdbbackup
<backup-file>"><a name="id2483932"></a><h3>dumpdbbackup
<backup-file></h3><p>
This command will dump the content of database backup to the screen
(similar to ctdb catdb). This is a debugging command.
- </p></div><div class="refsect2" title="getmonmode"><a
name="id401312"></a><h3>getmonmode</h3><p>
+ </p></div><div class="refsect2" title="getmonmode"><a
name="id2483944"></a><h3>getmonmode</h3><p>
This command returns the monutoring mode of a node. The monitoring
mode is either ACTIVE or DISABLED. Normally a node will continously monitor
that all other nodes that are expected are in fact connected and that they
respond to commands.
</p><p>
ACTIVE - This is the normal mode. The node is actively monitoring all
other nodes, both that the transport is connected and also that the node
responds to commands. If a node becomes unavailable, it will be marked as
DISCONNECTED and a recovery is initiated to restore the cluster.
</p><p>
DISABLED - This node is not monitoring that other nodes are available.
In this mode a node failure will not be detected and no recovery will be
performed. This mode is useful when for debugging purposes one wants to attach
GDB to a ctdb process but wants to prevent the rest of the cluster from marking
this node as DISCONNECTED and do a recovery.
- </p></div><div class="refsect2" title="setmonmode <0|1>"><a
name="id401335"></a><h3>setmonmode <0|1></h3><p>
+ </p></div><div class="refsect2" title="setmonmode <0|1>"><a
name="id2483974"></a><h3>setmonmode <0|1></h3><p>
This command can be used to explicitly disable/enable monitoring mode
on a node. The main purpose is if one wants to attach GDB to a running ctdb
daemon but wants to prevent the other nodes from marking it as DISCONNECTED and
issuing a recovery. To do this, set monitoring mode to 0 on all nodes before
attaching with GDB. Remember to set monitoring mode back to 1 afterwards.
- </p></div><div class="refsect2" title="attach <dbname>"><a
name="id401347"></a><h3>attach <dbname></h3><p>
+ </p></div><div class="refsect2" title="attach <dbname>"><a
name="id2483997"></a><h3>attach <dbname></h3><p>
This is a debugging command. This command will make the CTDB daemon
create a new CTDB database and attach to it.
- </p></div><div class="refsect2" title="dumpmemory"><a
name="id401357"></a><h3>dumpmemory</h3><p>
+ </p></div><div class="refsect2" title="dumpmemory"><a
name="id2484008"></a><h3>dumpmemory</h3><p>
This is a debugging command. This command will make the ctdb
daemon to write a fill memory allocation map to standard output.
- </p></div><div class="refsect2" title="rddumpmemory"><a
name="id401367"></a><h3>rddumpmemory</h3><p>
+ </p></div><div class="refsect2" title="rddumpmemory"><a
name="id2484019"></a><h3>rddumpmemory</h3><p>
This is a debugging command. This command will dump the talloc memory
allocation tree for the recovery daemon to standard output.
- </p></div><div class="refsect2" title="freeze"><a
name="id401377"></a><h3>freeze</h3><p>
+ </p></div><div class="refsect2" title="freeze"><a
name="id2484031"></a><h3>freeze</h3><p>
This command will lock all the local TDB databases causing clients
that are accessing these TDBs such as samba3 to block until the
databases are thawed.
@@ -698,26 +701,26 @@ HEALTH: NO-HEALTHY-NODES - ERROR - Backup of corrupted
TDB in '/var/ctdb/persist
This is primarily used by the recovery daemon to stop all samba
daemons from accessing any databases while the database is recovered
and rebuilt.
- </p></div><div class="refsect2" title="thaw"><a
name="id401392"></a><h3>thaw</h3><p>
+ </p></div><div class="refsect2" title="thaw"><a
name="id2484049"></a><h3>thaw</h3><p>
Thaw a previously frozen node.
- </p></div><div class="refsect2" title="eventscript <arguments>"><a
name="id401400"></a><h3>eventscript <arguments></h3><p>
+ </p></div><div class="refsect2" title="eventscript <arguments>"><a
name="id2484059"></a><h3>eventscript <arguments></h3><p>
This is a debugging command. This command can be used to manually
invoke and run the eventscritps with arbitrary arguments.
- </p></div><div class="refsect2" title="ban <bantime|0>"><a
name="id401410"></a><h3>ban <bantime|0></h3><p>
+ </p></div><div class="refsect2" title="ban <bantime|0>"><a
name="id2484070"></a><h3>ban <bantime|0></h3><p>
Administratively ban a node for bantime seconds. A bantime of 0 means
that the node should be permanently banned.
</p><p>
A banned node does not participate in the cluster and does not host
any records for the clustered TDB. Its ip address has been taken over by
another node and no services are hosted.
</p><p>
Nodes are automatically banned if they are the cause of too many
cluster recoveries.
- </p></div><div class="refsect2" title="unban"><a
name="id401429"></a><h3>unban</h3><p>
--
CTDB repository
