openstack/swift
Code Issues Proposed changes
f559c50acb
swift/doc/manpages/container-server.conf.5
Peter Portante 2d42b37303 Add the max_clients parameter to bound clients 
The new max_clients parameter allows one full control over the maximum
number of client requests that will be handled by a given worker for
any of the proxy, account, container or object servers.

Lowering the number of clients handled per worker, and raising the
number of workers can lessen the impact that a CPU intensive, or
blocking, request can have on other requests served by the same
worker.

If the maximum number of clients is set to one, then a given worker
will not perform another accept(2) call while processing, allowing
other workers a chance to process it.

DocImpact
Signed-off-by: Peter Portante <peter.portante@redhat.com>

Change-Id: Ic01430f7a6c5ff48d7aa349dc86a5f8ac463a420
2013-04-26 10:29:57 -04:00

287 lines
9.2 KiB
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.\"
.\" Author: Joao Marcelo Martins <marcelo.martins@rackspace.com> or <btorch@gmail.com>
.\" Copyright (c) 2010-2012 OpenStack Foundation.
.\"
.\" Licensed under the Apache License, Version 2.0 (the "License");
.\" you may not use this file except in compliance with the License.
.\" You may obtain a copy of the License at
.\"
.\" http://www.apache.org/licenses/LICENSE-2.0
.\"
.\" Unless required by applicable law or agreed to in writing, software
.\" distributed under the License is distributed on an "AS IS" BASIS,
.\" WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
.\" implied.
.\" See the License for the specific language governing permissions and
.\" limitations under the License.
.\"
.TH container-server.conf 5 "8/26/2011" "Linux" "OpenStack Swift"
.SH NAME
.LP
.B container-server.conf
\- configuration file for the openstack-swift container server
.SH SYNOPSIS
.LP
.B container-server.conf
.SH DESCRIPTION
.PP
This is the configuration file used by the container server and other container
background services, such as; replicator, updater, auditor and sync.
The configuration file follows the python-pastedeploy syntax. The file is divided
into sections, which are enclosed by square brackets. Each section will contain a
certain number of key/value parameters which are described later.
Any line that begins with a '#' symbol is ignored.
You can find more information about python-pastedeploy configuration format at
\fIhttp://pythonpaste.org/deploy/#config-format\fR
.SH GLOBAL SECTION
.PD 1
.RS 0
This is indicated by section named [DEFAULT]. Below are the parameters that
are acceptable within this section.
.IP "\fBbind_ip\fR"
IP address the container server should bind to. The default is 0.0.0.0 which will make
it bind to all available addresses.
.IP "\fBbind_port\fR"
TCP port the container server should bind to. The default is 6001.
.IP \fBbacklog\fR
TCP backlog. Maximum number of allowed pending connections. The default value is 4096.
.IP \fBworkers\fR
Number of container server workers to fork. The default is 1.
.IP \fBuser\fR
The system user that the container server will run as. The default is swift.
.IP \fBswift_dir\fR
Swift configuration directory. The default is /etc/swift.
.IP \fBdevices\fR
Parent directory or where devices are mounted. Default is /srv/node.
.IP \fBmount_check\fR
Whether or not check if the devices are mounted to prevent accidentally writing to
the root device. The default is set to true.
.IP \fBlog_name\fR
Label used when logging. The default is swift.
.IP \fBlog_facility\fR
Syslog log facility. The default is LOG_LOCAL0.
.IP \fBlog_level\fR
Logging level. The default is INFO.
.IP \fBlog_address\fR
Logging address. The default is /dev/log.
.RE
.PD
.SH PIPELINE SECTION
.PD 1
.RS 0
This is indicated by section name [pipeline:main]. Below are the parameters that
are acceptable within this section.
.IP "\fBpipeline\fR"
It is used when you need to apply a number of filters. It is a list of filters
ended by an application. The normal pipeline is "healthcheck
recon container-server".
.RE
.PD
.SH APP SECTION
.PD 1
.RS 0
This is indicated by section name [app:container-server]. Below are the parameters
that are acceptable within this section.
.IP "\fBuse\fR"
Entry point for paste.deploy for the container server. This is the reference to the installed python egg.
This is normally \fBegg:swift#container\fR.
.IP "\fBset log_name\fR
Label used when logging. The default is container-server.
.IP "\fBset log_facility\fR
Syslog log facility. The default is LOG_LOCAL0.
.IP "\fB set log_level\fR
Logging level. The default is INFO.
.IP "\fB set log_requests\fR
Enables request logging. The default is True.
.IP "\fB set log_address\fR
Logging address. The default is /dev/log.
.IP \fBnode_timeout\fR
Request timeout to external services. The default is 3 seconds.
.IP \fBconn_timeout\fR
Connection timeout to external services. The default is 0.5 seconds.
.IP \fBmax_clients\fR
Maximum number of clients one worker can process simultaneously (it will
actually accept(2) N + 1). Setting this to one (1) will only handle one request
at a time, without accepting another request concurrently. By increasing the
number of workers to a much higher value, one can reduce the impact of slow file system
operations in one request from negatively impacting other requests. The default is 1024.
.RE
.PD
.SH FILTER SECTION
.PD 1
.RS 0
Any section that has its name prefixed by "filter:" indicates a filter section.
Filters are used to specify configuration parameters for specific swift middlewares.
Below are the filters available and respective acceptable parameters.
.IP "\fB[filter:healthcheck]\fR"
.RE
.RS 3
.IP "\fBuse\fR"
Entry point for paste.deploy for the healthcheck middleware. This is the reference to the installed python egg.
This is normally \fBegg:swift#healthcheck\fR.
.IP "\fBdisable_path\fR"
An optional filesystem path which, if present, will cause the healthcheck
URL to return "503 Service Unavailable" with a body of "DISABLED BY FILE".
.RE
.RS 0
.IP "\fB[filter:recon]\fR"
.RS 3
.IP "\fBuse\fR"
Entry point for paste.deploy for the recon middleware. This is the reference to the installed python egg.
This is normally \fBegg:swift#recon\fR.
.IP "\fBrecon_cache_path\fR"
The recon_cache_path simply sets the directory where stats for a few items will be stored.
Depending on the method of deployment you may need to create this directory manually
and ensure that swift has read/write. The default is /var/cache/swift.
.RE
.PD
.SH ADDITIONAL SECTIONS
.PD 1
.RS 0
The following sections are used by other swift-container services, such as replicator,
updater, auditor and sync.
.IP "\fB[container-replicator]\fR"
.RE
.RS 3
.IP \fBlog_name\fR
Label used when logging. The default is container-replicator.
.IP \fBlog_facility\fR
Syslog log facility. The default is LOG_LOCAL0.
.IP \fBlog_level\fR
Logging level. The default is INFO.
.IP \fBlog_address\fR
Logging address. The default is /dev/log.
.IP \fBvm_test_mode\fR
Indicates that you are using a VM environment. The default is no.
.IP \fBer_diff\fR
The default is 1000.
.IP \fBmax_diffs\fR
This caps how long the replicator will spend trying to sync a given database per pass so the other databases don't get starved. The default is 100.
.IP \fBconcurrency\fR
Number of replication workers to spawn. The default is 8.
.IP "\fBrun_pause [deprecated]\fR"
Time in seconds to wait between replication passes. The default is 10.
.IP \fBinterval\fR
Replaces run_pause with the more standard "interval", which means the replicator won't pause unless it takes less than the interval set. The default is 30.
.IP \fBnode_timeout\fR
Request timeout to external services. The default is 10 seconds.
.IP \fBconn_timeout\fR
Connection timeout to external services. The default is 0.5 seconds.
.IP \fBreclaim_age\fR
Time elapsed in seconds before an container can be reclaimed. The default is
604800 seconds.
.RE
.RS 0
.IP "\fB[container-updater]\fR"
.RE
.RS 3
.IP \fBlog_name\fR
Label used when logging. The default is container-updater.
.IP \fBlog_facility\fR
Syslog log facility. The default is LOG_LOCAL0.
.IP \fBlog_level\fR
Logging level. The default is INFO.
.IP \fBlog_address\fR
Logging address. The default is /dev/log.
.IP \fBinterval\fR
Minimum time for a pass to take. The default is 300 seconds.
.IP \fBconcurrency\fR
Number of reaper workers to spawn. The default is 4.
.IP \fBnode_timeout\fR
Request timeout to external services. The default is 3 seconds.
.IP \fBconn_timeout\fR
Connection timeout to external services. The default is 0.5 seconds.
.IP \fBslowdown = 0.01\fR
Slowdown will sleep that amount between containers. The default is 0.01 seconds.
.IP \fBaccount_suppression_time\fR
Seconds to suppress updating an account that has generated an error. The default is 60 seconds.
.RE
.PD
.RS 0
.IP "\fB[container-auditor]\fR"
.RE
.RS 3
.IP \fBlog_name\fR
Label used when logging. The default is container-auditor.
.IP \fBlog_facility\fR
Syslog log facility. The default is LOG_LOCAL0.
.IP \fBlog_level\fR
Logging level. The default is INFO.
.IP \fBlog_address\fR
Logging address. The default is /dev/log.
.IP \fBinterval\fR
Will audit, at most, 1 container per device per interval. The default is 1800 seconds.
.IP \fBcontainers_per_second\fR
Maximum containers audited per second. Should be tuned according to individual system specs. 0 is unlimited. The default is 200.
.RE
.RS 0
.IP "\fB[container-sync]\fR"
.RE
.RS 3
.IP \fBlog_name\fR
Label used when logging. The default is container-sync.
.IP \fBlog_facility\fR
Syslog log facility. The default is LOG_LOCAL0.
.IP \fBlog_level\fR
Logging level. The default is INFO.
.IP \fBlog_address\fR
Logging address. The default is /dev/log.
.IP \fBsync_proxy\fR
If you need to use an HTTP Proxy, set it here; defaults to no proxy.
.IP \fBinterval\fR
Will audit, at most, each container once per interval. The default is 300 seconds.
.IP \fBcontainer_time\fR
Maximum amount of time to spend syncing each container per pass. The default is 60 seconds.
.RE
.PD
.SH DOCUMENTATION
.LP
More in depth documentation about the swift-container-server and
also Openstack-Swift as a whole can be found at
.BI http://swift.openstack.org/admin_guide.html
and
.BI http://swift.openstack.org
.SH "SEE ALSO"
.BR swift-container-server(1),
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