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authorunknown <knielsen@knielsen-hq.org>2009-09-16 14:03:18 +0200
committerunknown <knielsen@knielsen-hq.org>2009-09-16 14:03:18 +0200
commit36f3cbfdc6188d63416b2fbd5a88fe2f8faa2425 (patch)
tree811890751c639e5382a1a294623c6a4f8ed42d83 /man/ndbmtd.8
parentcc5e283d15f10413924e92a86b4584d97246c64b (diff)
downloadmariadb-git-36f3cbfdc6188d63416b2fbd5a88fe2f8faa2425.tar.gz
Imported MySQL documentation files from /home/knielsen/devel/maria/mysql-5.1.38
Diffstat (limited to 'man/ndbmtd.8')
-rw-r--r--man/ndbmtd.8265
1 files changed, 189 insertions, 76 deletions
diff --git a/man/ndbmtd.8 b/man/ndbmtd.8
index b1e977f7857..222e0e496bf 100644
--- a/man/ndbmtd.8
+++ b/man/ndbmtd.8
@@ -1,19 +1,32 @@
+'\" t
.\" Title: \fBndbmtd\fR
-.\" Author:
-.\" Generator: DocBook XSL Stylesheets v1.70.1 <http://docbook.sf.net/>
-.\" Date: 03/31/2009
+.\" Author: [FIXME: author] [see http://docbook.sf.net/el/author]
+.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
+.\" Date: 08/12/2009
.\" Manual: MySQL Database System
.\" Source: MySQL 5.1
+.\" Language: English
.\"
-.TH "\fBNDBMTD\fR" "8" "03/31/2009" "MySQL 5.1" "MySQL Database System"
+.TH "\FBNDBMTD\FR" "8" "08/12/2009" "MySQL 5\&.1" "MySQL Database System"
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.\" ndbmtd
+.\" MySQL Cluster: ndbmtd
+.\" MySQL Cluster: data nodes
+.\" data nodes (MySQL Cluster)
+.\" storage nodes - see data nodes, ndbd, ndbmtd
.SH "NAME"
-ndbmtd \- the MySQL Cluster storage engine node process (multi\-threaded version)
+ndbmtd \- the MySQL Cluster data node daemon (multi\-threaded version)
.SH "SYNOPSIS"
-.HP 15
+.HP \w'\fBndbmtd\ \fR\fB\fIoptions\fR\fR\ 'u
\fBndbmtd \fR\fB\fIoptions\fR\fR
.SH "DESCRIPTION"
.PP
@@ -21,84 +34,121 @@ ndbmtd \- the MySQL Cluster storage engine node process (multi\-threaded version
is a multi\-threaded version of
\fBndbd\fR, the process that is used to handle all the data in tables using the
NDBCLUSTER
-storage engine.
+storage engine\&.
\fBndbmtd\fR
-is intended for use on host computers having multiple CPU cores. Except where otherwise noted,
+is intended for use on host computers having multiple CPU cores\&. Except where otherwise noted,
\fBndbmtd\fR
functions in the same way as
\fBndbd\fR; therefore, in this section, we concentrate on the ways in which
\fBndbmtd\fR
differs from
\fBndbd\fR, and you should consult
-\fBndbd\fR(8), for additional information about running MySQL Cluster data nodes that apply to both the single\-threaded and multi\-threaded versions of the data node process.
+\fBndbd\fR(8), for additional information about running MySQL Cluster data nodes that apply to both the single\-threaded and multi\-threaded versions of the data node process\&.
.PP
Command\-line options and configuration parameters used with
\fBndbd\fR
also apply to
-\fBndbmtd\fR. For more information about these options and parameters, see
-Section\ 17.6.2.1, \(lqCommand Options for \fBndbd\fR and \fBndbmtd\fR\(rq, and
-Section\ 17.3.4.6, \(lqDefining MySQL Cluster Data Nodes\(rq, respectively.
+\fBndbmtd\fR\&. For more information about these options and parameters, see
+Section\ \&17.6.3.2, \(lqProgram Options for ndbd and ndbmtd\(rq, and
+Section\ \&17.3.4.6, \(lqDefining MySQL Cluster Data Nodes\(rq, respectively\&.
.PP
\fBndbmtd\fR
is also file system\-compatible with
-\fBndbd\fR. In other words, a data node running
+\fBndbd\fR\&. In other words, a data node running
\fBndbd\fR
can be stopped, the binary replaced with
-\fBndbmtd\fR, and then restarted without any loss of data. (However, when doing this, you must make sure that
+\fBndbmtd\fR, and then restarted without any loss of data\&. (However, when doing this, you must make sure that
MaxNoOfExecutionThreads
is set to an apppriate value before restarting the node if you wish for
\fBndbmtd\fR
-to run in multi\-threaded fashion.) Similarly, an
+to run in multi\-threaded fashion\&.) Similarly, an
\fBndbmtd\fR
binary can be replaced with
\fBndbd\fR
simply by stopping the node and then starting
\fBndbd\fR
-in place of the multi\-threaded binary. It is not necessary when switching between the two to start the data node binary using
-\fB\-\-initial\fR.
+in place of the multi\-threaded binary\&. It is not necessary when switching between the two to start the data node binary using
+\fB\-\-initial\fR\&.
+.if n \{\
+.sp
+.\}
+.RS 4
+.it 1 an-trap
+.nr an-no-space-flag 1
+.nr an-break-flag 1
+.br
+.ps +1
+\fBImportant\fR
+.ps -1
+.br
+.PP
+We do not currently recommend using
+\fBndbmtd\fR
+with MySQL Cluster Disk Data tables in production, due to known issues which we are working to fix in a future MySQL Cluster release\&. (\m[blue]\fBBug#41915\fR\m[]\&\s-2\u[1]\d\s+2,
+\m[blue]\fBBug#44915\fR\m[]\&\s-2\u[2]\d\s+2)
+.sp .5v
+.RE
.PP
Using
\fBndbmtd\fR
differs from using
\fBndbd\fR
in two key respects:
-.TP 3n
-1.
+.sp
+.RS 4
+.ie n \{\
+\h'-04' 1.\h'+01'\c
+.\}
+.el \{\
+.sp -1
+.IP " 1." 4.2
+.\}
You must set an appropriate value for the
MaxNoOfExecutionThreads
configuration parameter in the
-\fIconfig.ini\fR
-file. If you do not do so,
+config\&.ini
+file\&. If you do not do so,
\fBndbmtd\fR
runs in single\-threaded mode \(em that is, it behaves like
-\fBndbd\fR.
-.TP 3n
-2.
+\fBndbd\fR\&.
+.RE
+.sp
+.RS 4
+.ie n \{\
+\h'-04' 2.\h'+01'\c
+.\}
+.el \{\
+.sp -1
+.IP " 2." 4.2
+.\}
Trace files are generated by critical errors in
\fBndbmtd\fR
processes in a somewhat different fashion from how these are generated by
\fBndbd\fR
-failures.
-.sp
+failures\&.
.RE
.PP
-These differences are discussed in more detail in the next few paragraphs.
+These differences are discussed in more detail in the next few paragraphs\&.
+.\" ndbmtd: MaxNoOfExecutionThreads
+.\" MaxNoOfExecutionThreads: ndbmtd
+.\" ndbmtd: trace files
+.\" trace files: ndbmtd
.PP
\fBNumber of execution threads\fR. The
MaxNoOfExecutionThreads
configuration parameter is used to determine the number of local query handler (LQH) threads spawned by
-\fBndbmtd\fR. Although this parameter is set in
+\fBndbmtd\fR\&. Although this parameter is set in
[ndbd]
or
[ndbd default]
sections of the
-\fIconfig.ini\fR
+config\&.ini
file, it is exclusive to
\fBndbmtd\fR
and does not apply to
-\fBndbd\fR.
+\fBndbd\fR\&.
.PP
-This parameter takes an integer value from 2 to 8 inclusive. Generally, you should set this to the number of CPU cores on the data node host, as shown in the following table:
+This parameter takes an integer value from 2 to 8 inclusive\&. Generally, you should set this to the number of CPU cores on the data node host, as shown in the following table:
.TS
allbox tab(:);
lB lB.
@@ -127,26 +177,56 @@ T}:T{
8
T}
.TE
-.sp
+.sp 1
.PP
(It is possible to set this parameter to other values within the permitted range, but these are automatically rounded as shown in the
\fBValue Used\fR
-column of the next table in this section.)
+column of the next table in this section\&.)
.PP
The multi\-threaded data node process always spawns at least 4 threads:
-.TP 3n
-\(bu
+.sp
+.RS 4
+.ie n \{\
+\h'-04'\(bu\h'+03'\c
+.\}
+.el \{\
+.sp -1
+.IP \(bu 2.3
+.\}
1 local query handler (LQH) thread
-.TP 3n
-\(bu
+.RE
+.sp
+.RS 4
+.ie n \{\
+\h'-04'\(bu\h'+03'\c
+.\}
+.el \{\
+.sp -1
+.IP \(bu 2.3
+.\}
1 transaction coordinator (TC) thread
-.TP 3n
-\(bu
+.RE
+.sp
+.RS 4
+.ie n \{\
+\h'-04'\(bu\h'+03'\c
+.\}
+.el \{\
+.sp -1
+.IP \(bu 2.3
+.\}
1 transporter thread
-.TP 3n
-\(bu
-1 subscription manager (SUMA) thread
+.RE
.sp
+.RS 4
+.ie n \{\
+\h'-04'\(bu\h'+03'\c
+.\}
+.el \{\
+.sp -1
+.IP \(bu 2.3
+.\}
+1 subscription manager (SUMA) thread
.RE
.PP
Setting this parameter to a value between 4 and 8 inclusive causes additional LQH threads to be used by
@@ -156,7 +236,7 @@ Setting this parameter to a value between 4 and 8 inclusive causes additional LQ
allbox tab(:);
lB lB lB.
T{
-\fIconfig.ini\fR Value
+config\&.ini Value
T}:T{
Value Used
T}:T{
@@ -188,30 +268,41 @@ T}:T{
4
T}
.TE
-.sp
+.sp 1
.PP
Setting this parameter outside the permitted range of values causes the management server to abort on startup with the error
-Error line \fInumber\fR: Illegal value \fIvalue\fR for parameter MaxNoOfExecutionThreads.
+Error line \fInumber\fR: Illegal value \fIvalue\fR for parameter MaxNoOfExecutionThreads\&.
+.if n \{\
.sp
+.\}
+.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
+.ps +1
\fBNote\fR
+.ps -1
+.br
.PP
-In MySQL Cluster NDB 6.4.0, it is not possible to set
+In MySQL Cluster NDB 6\&.4\&.0, it is not possible to set
MaxNoOfExecutionThreads
-to 2. You can safely use the value 3 instead (it is treated as 2 internally). This issue is resolved in MySQL Cluster NDB 6.4.1.
+to 2\&. You can safely use the value 3 instead (it is treated as 2 internally)\&. This issue is resolved in MySQL Cluster NDB 6\&.4\&.1\&.
+.sp .5v
+.RE
.PP
-In MySQL Cluster NDB 6.4.0 through 6.4.3, the default value for this parameter was undefined, although the default behavior for
+In MySQL Cluster NDB 6\&.4\&.0 through 6\&.4\&.3, the default value for this parameter was undefined, although the default behavior for
\fBndbmtd\fR
was to use 1 LQH thread, as though
MaxNoOfExecutionThreads
-had been set to 2. Beginning with MySQL Cluster NDB 7.0.4, this parameter has an explcit default value of 2, thus guaranteeing this default behavior.
+had been set to 2\&. Beginning with MySQL Cluster NDB 7\&.0\&.4, this parameter has an explcit default value of 2, thus guaranteeing this default behavior\&.
.PP
-In MySQL Cluster NDB 7.0, it is not possible to cause
+In MySQL Cluster NDB 7\&.0, it is not possible to cause
\fBndbmtd\fR
-to use more than 1 TC thread, although we plan to introduce this capability in a future MySQL Cluster release series.
+to use more than 1 TC thread, although we plan to introduce this capability in a future MySQL Cluster release series\&.
+.\" MySQL Cluster: log files
+.\" log files (MySQL Cluster): ndbmtd
+.\" ndbmtd: trace files
.PP
Like
\fBndbd\fR,
@@ -219,67 +310,89 @@ Like
generates a set of log files which are placed in the directory specified by
DataDir
in the
-\fIconfig.ini\fR
-configuration file. Except for trace files, these are generated in the same way and have the same names as those generated by
-\fBndbd\fR.
+config\&.ini
+configuration file\&. Except for trace files, these are generated in the same way and have the same names as those generated by
+\fBndbd\fR\&.
.PP
In the event of a critical error,
\fBndbmtd\fR
-generates trace files describing what happened just prior to the error' occurrence. These files, which can be found in the data node's
-DataDir, are useful for analysis of problems by the MySQL Cluster Development and Support teams. One trace file is generated for each
+generates trace files describing what happened just prior to the error\' occurrence\&. These files, which can be found in the data node\'s
+DataDir, are useful for analysis of problems by the MySQL Cluster Development and Support teams\&. One trace file is generated for each
\fBndbmtd\fR
-thread. The names of these files follow the pattern
-\fIndb_\fR\fI\fInode_id\fR\fR\fI_trace.log.\fR\fI\fItrace_id\fR\fR\fI_t\fR\fI\fIthread_id\fR\fR, where
+thread\&. The names of these files follow the pattern
+ndb_\fInode_id\fR_trace\&.log\&.\fItrace_id\fR_t\fIthread_id\fR, where
\fInode_id\fR
-is the data node's unique node ID in the cluster,
+is the data node\'s unique node ID in the cluster,
\fItrace_id\fR
is a trace sequence number, and
\fIthread_id\fR
-is the thread ID. For example, in the event of the failure of an
+is the thread ID\&. For example, in the event of the failure of an
\fBndbmtd\fR
process running as a MySQL Cluster data node having the node ID 3 and with
MaxNoOfExecutionThreads
-equal to 4, four trace files are generated in the data node's data directory; if the is the first time this node has failed, then these files are named
-\fIndb_3_trace.log.1_t1\fR,
-\fIndb_3_trace.log.1_t2\fR,
-\fIndb_3_trace.log.1_t3\fR, and
-\fIndb_3_trace.log.1_t4\fR. Internally, these trace files follow the same format as
+equal to 4, four trace files are generated in the data node\'s data directory; if the is the first time this node has failed, then these files are named
+ndb_3_trace\&.log\&.1_t1,
+ndb_3_trace\&.log\&.1_t2,
+ndb_3_trace\&.log\&.1_t3, and
+ndb_3_trace\&.log\&.1_t4\&. Internally, these trace files follow the same format as
\fBndbd\fR
-trace files.
+trace files\&.
.PP
The
\fBndbd\fR
exit codes and messages that are generated when a data node process shuts down prematurely are also used by
-\fBndbmtd\fR. See
-[1]\&\fIndbd Error Messages\fR, for a listing of these.
+\fBndbmtd\fR\&. See
+\m[blue]\fBndbd Error Messages\fR\m[]\&\s-2\u[3]\d\s+2, for a listing of these\&.
+.if n \{\
.sp
+.\}
+.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
+.ps +1
\fBNote\fR
+.ps -1
+.br
.PP
It is possible to use
\fBndbd\fR
and
\fBndbmtd\fR
-concurrently on different data nodes in the same MySQL Cluster. However, such configurations have not been tested extensively; thus, we cannot not recommend doing so in a production setting at this time.
+concurrently on different data nodes in the same MySQL Cluster\&. However, such configurations have not been tested extensively; thus, we cannot not recommend doing so in a production setting at this time\&.
+.sp .5v
+.RE
.SH "COPYRIGHT"
+.br
.PP
-Copyright 2007\-2008 MySQL AB, 2009 Sun Microsystems, Inc.
+Copyright 2007-2008 MySQL AB, 2009 Sun Microsystems, Inc.
.PP
This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.
.PP
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
.PP
-You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110\-1301 USA or see http://www.gnu.org/licenses/.
-.SH "REFERENCES"
-.TP 3
-1.\ ndbd Error Messages
-\%http://dev.mysql.com/doc/ndbapi/en/ndbd\-error\-messages.html
+You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.
+.sp
+.SH "NOTES"
+.IP " 1." 4
+Bug#41915
+.RS 4
+\%http://bugs.mysql.com/41915
+.RE
+.IP " 2." 4
+Bug#44915
+.RS 4
+\%http://bugs.mysql.com/44915
+.RE
+.IP " 3." 4
+ndbd Error Messages
+.RS 4
+\%http://dev.mysql.com/doc/ndbapi/en/ndbd-error-messages.html
+.RE
.SH "SEE ALSO"
For more information, please refer to the MySQL Reference Manual,
which may already be installed locally and which is also available
online at http://dev.mysql.com/doc/.
.SH AUTHOR
-MySQL AB (http://www.mysql.com/).
+Sun Microsystems, Inc. (http://www.mysql.com/).