522 lines
20 KiB
Groff
522 lines
20 KiB
Groff
.\"
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.\" Author: Joao Marcelo Martins <marcelo.martins@rackspace.com> or <btorch@gmail.com>
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.\" Copyright (c) 2010-2012 OpenStack Foundation.
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.\"
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.\" Licensed under the Apache License, Version 2.0 (the "License");
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.\" you may not use this file except in compliance with the License.
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.\" You may obtain a copy of the License at
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.\"
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.\" http://www.apache.org/licenses/LICENSE-2.0
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.\"
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.\" Unless required by applicable law or agreed to in writing, software
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.\" distributed under the License is distributed on an "AS IS" BASIS,
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.\" WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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.\" implied.
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.\" See the License for the specific language governing permissions and
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.\" limitations under the License.
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.\"
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.TH object-server.conf 5 "8/26/2011" "Linux" "OpenStack Swift"
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.SH NAME
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.LP
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.B object-server.conf
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\- configuration file for the openstack-swift object server
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.SH SYNOPSIS
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.LP
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.B object-server.conf
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.SH DESCRIPTION
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.PP
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This is the configuration file used by the object server and other object
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background services, such as; replicator, reconstructor, updater and auditor.
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The configuration file follows the python-pastedeploy syntax. The file is divided
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into sections, which are enclosed by square brackets. Each section will contain a
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certain number of key/value parameters which are described later.
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Any line that begins with a '#' symbol is ignored.
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You can find more information about python-pastedeploy configuration format at
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\fIhttp://pythonpaste.org/deploy/#config-format\fR
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.SH GLOBAL SECTION
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.PD 1
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.RS 0
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This is indicated by section named [DEFAULT]. Below are the parameters that
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are acceptable within this section.
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.IP "\fBbind_ip\fR"
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IP address the object server should bind to. The default is 0.0.0.0 which will make
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it bind to all available addresses.
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.IP "\fBbind_port\fR"
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TCP port the object server should bind to. The default is 6200.
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.IP "\fBbind_timeout\fR"
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Timeout to bind socket. The default is 30.
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.IP \fBbacklog\fR
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TCP backlog. Maximum number of allowed pending connections. The default value is 4096.
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.IP \fBworkers\fR
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The number of pre-forked processes that will accept connections. Zero means
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no fork. The default is auto which will make the server try to match the
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number of effective cpu cores if python multiprocessing is available (included
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with most python distributions >= 2.6) or fallback to one. It's worth noting
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that individual workers will use many eventlet co-routines to service multiple
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concurrent requests.
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.IP \fBmax_clients\fR
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Maximum number of clients one worker can process simultaneously (it will
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actually accept(2) N + 1). Setting this to one (1) will only handle one request
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at a time, without accepting another request concurrently. The default is 1024.
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.IP \fBuser\fR
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The system user that the object server will run as. The default is swift.
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.IP \fBswift_dir\fR
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Swift configuration directory. The default is /etc/swift.
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.IP \fBdevices\fR
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Parent directory of where devices are mounted. Default is /srv/node.
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.IP \fBmount_check\fR
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Whether or not check if the devices are mounted to prevent accidentally writing to
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the root device. The default is set to true.
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.IP \fBdisable_fallocate\fR
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Disable pre-allocate disk space for a file. The default is false.
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.IP \fBexpiring_objects_container_divisor\fR
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The default is 86400.
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.IP \fBexpiring_objects_account_name\fR
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The default is 'expiring_objects'.
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.IP \fBservers_per_port\fR
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Make object-server run this many worker processes per unique port of "local"
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ring devices across all storage policies. The default value of 0 disables this
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feature.
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.IP \fBlog_name\fR
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Label used when logging. The default is swift.
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.IP \fBlog_facility\fR
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Syslog log facility. The default is LOG_LOCAL0.
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.IP \fBlog_level\fR
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Logging level. The default is INFO.
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.IP \fBlog_address\fR
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Logging address. The default is /dev/log.
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.IP \fBlog_max_line_length\fR
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The following caps the length of log lines to the value given; no limit if
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set to 0, the default.
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.IP \fBlog_custom_handlers\fR
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Comma separated list of functions to call to setup custom log handlers.
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functions get passed: conf, name, log_to_console, log_route, fmt, logger,
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adapted_logger. The default is empty.
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.IP \fBlog_udp_host\fR
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If set, log_udp_host will override log_address.
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.IP "\fBlog_udp_port\fR
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UDP log port, the default is 514.
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.IP \fBlog_statsd_host\fR
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StatsD server. IPv4/IPv6 addresses and hostnames are
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supported. If a hostname resolves to an IPv4 and IPv6 address, the IPv4
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address will be used.
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.IP \fBlog_statsd_port\fR
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The default is 8125.
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.IP \fBlog_statsd_default_sample_rate\fR
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The default is 1.
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.IP \fBlog_statsd_sample_rate_factor\fR
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The default is 1.
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.IP \fBlog_statsd_metric_prefix\fR
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The default is empty.
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.IP \fBeventlet_debug\fR
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Debug mode for eventlet library. The default is false.
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.IP \fBfallocate_reserve\fR
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You can set fallocate_reserve to the number of bytes or percentage of disk
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space you'd like fallocate to reserve, whether there is space for the given
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file size or not. Percentage will be used if the value ends with a '%'.
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The default is 1%.
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.IP \fBnode_timeout\fR
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Request timeout to external services. The default is 3 seconds.
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.IP \fBconn_timeout\fR
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Connection timeout to external services. The default is 0.5 seconds.
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.IP \fBcontainer_update_timeout\fR
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Time to wait while sending a container update on object update. The default is 1 second.
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.IP \fBclient_timeout\fR
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Time to wait while receiving each chunk of data from a client or another
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backend node. The default is 60.
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.IP \fBnetwork_chunk_size\fR
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The default is 65536.
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.IP \fBdisk_chunk_size\fR
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The default is 65536.
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.RE
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.PD
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.SH PIPELINE SECTION
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.PD 1
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.RS 0
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This is indicated by section name [pipeline:main]. Below are the parameters that
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are acceptable within this section.
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.IP "\fBpipeline\fR"
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It is used when you need to apply a number of filters. It is a list of filters
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ended by an application. The normal pipeline is "healthcheck recon
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object-server".
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.RE
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.PD
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.SH APP SECTION
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.PD 1
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.RS 0
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This is indicated by section name [app:object-server]. Below are the parameters
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that are acceptable within this section.
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.IP "\fBuse\fR"
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Entry point for paste.deploy for the object server. This is the reference to the installed python egg.
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This is normally \fBegg:swift#object\fR.
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.IP "\fBset log_name\fR"
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Label used when logging. The default is object-server.
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.IP "\fBset log_facility\fR"
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Syslog log facility. The default is LOG_LOCAL0.
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.IP "\fBset log_level\fR"
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Logging level. The default is INFO.
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.IP "\fBset log_requests\fR"
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Enables request logging. The default is True.
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.IP "\fBset log_address\fR"
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Logging address. The default is /dev/log.
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.IP "\fBmax_upload_time\fR"
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The default is 86400.
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.IP "\fBslow\fR"
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The default is 0.
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.IP "\fBkeep_cache_size\fR"
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Objects smaller than this are not evicted from the buffercache once read. The default is 5242880.
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.IP "\fBkeep_cache_private\fR"
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If true, objects for authenticated GET requests may be kept in buffer cache
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if small enough. The default is false.
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.IP "\fBmb_per_sync\fR"
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On PUTs, sync data every n MB. The default is 512.
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.IP "\fBallowed_headers\fR"
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Comma separated list of headers that can be set in metadata on an object.
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This list is in addition to X-Object-Meta-* headers and cannot include Content-Type, etag, Content-Length, or deleted.
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The default is 'Content-Disposition, Content-Encoding, X-Delete-At, X-Object-Manifest, X-Static-Large-Object'.
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.IP "\fBauto_create_account_prefix\fR"
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The default is '.'.
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.IP "\fBthreads_per_disk\fR"
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A value of 0 means "don't use thread pools". A reasonable starting point is
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4. The default is 0.
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.IP "\fBreplication_server\fR"
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Configure parameter for creating specific server
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To handle all verbs, including replication verbs, do not specify
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"replication_server" (this is the default). To only handle replication,
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set to a True value (e.g. "True" or "1"). To handle only non-replication
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verbs, set to "False". Unless you have a separate replication network, you
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should not specify any value for "replication_server".
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.IP "\fBreplication_concurrency\fR"
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Set to restrict the number of concurrent incoming SSYNC requests
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Set to 0 for unlimited (the default is 4). Note that SSYNC requests are only used
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by the object reconstructor or the object replicator when configured to use ssync.
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.IP "\fBreplication_one_per_device\fR"
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Restricts incoming SSYNC requests to one per device,
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replication_currency above allowing. This can help control I/O to each
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device, but you may wish to set this to False to allow multiple SSYNC
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requests (up to the above replication_concurrency setting) per device. The default is true.
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.IP "\fBreplication_lock_timeout\fR"
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Number of seconds to wait for an existing replication device lock before
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giving up. The default is 15.
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.IP "\fBreplication_failure_threshold\fR"
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.IP "\fBreplication_failure_ratio\fR"
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These two settings control when the SSYNC subrequest handler will
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abort an incoming SSYNC attempt. An abort will occur if there are at
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least threshold number of failures and the value of failures / successes
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exceeds the ratio. The defaults of 100 and 1.0 means that at least 100
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failures have to occur and there have to be more failures than successes for
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an abort to occur.
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.IP "\fBsplice\fR"
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Use splice() for zero-copy object GETs. This requires Linux kernel
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version 3.0 or greater. If you set "splice = yes" but the kernel
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does not support it, error messages will appear in the object server
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logs at startup, but your object servers should continue to function.
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The default is false.
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.RE
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.PD
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.SH FILTER SECTION
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.PD 1
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.RS 0
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Any section that has its name prefixed by "filter:" indicates a filter section.
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Filters are used to specify configuration parameters for specific swift middlewares.
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Below are the filters available and respective acceptable parameters.
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.IP "\fB[filter:healthcheck]\fR"
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.RE
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.RS 3
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.IP "\fBuse\fR"
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Entry point for paste.deploy for the healthcheck middleware. This is the reference to the installed python egg.
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This is normally \fBegg:swift#healthcheck\fR.
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.IP "\fBdisable_path\fR"
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An optional filesystem path which, if present, will cause the healthcheck
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URL to return "503 Service Unavailable" with a body of "DISABLED BY FILE".
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.RE
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.RS 0
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.IP "\fB[filter:recon]\fR"
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.RE
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.RS 3
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.IP "\fBuse\fR"
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Entry point for paste.deploy for the recon middleware. This is the reference to the installed python egg.
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This is normally \fBegg:swift#recon\fR.
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.IP "\fBrecon_cache_path\fR"
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The recon_cache_path simply sets the directory where stats for a few items will be stored.
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Depending on the method of deployment you may need to create this directory manually
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and ensure that swift has read/write. The default is /var/cache/swift.
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.IP "\fBrecon_lock_path\fR"
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The default is /var/lock.
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.RE
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.PD
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.RS 0
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.IP "\fB[filter:xprofile]\fR"
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.RS 3
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.IP "\fBuse\fR"
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Entry point for paste.deploy for the xprofile middleware. This is the reference to the installed python egg.
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This is normally \fBegg:swift#xprofile\fR.
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.IP "\fBprofile_module\fR"
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This option enable you to switch profilers which should inherit from python
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standard profiler. Currently the supported value can be 'cProfile', 'eventlet.green.profile' etc.
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.IP "\fBlog_filename_prefix\fR"
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This prefix will be used to combine process ID and timestamp to name the
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profile data file. Make sure the executing user has permission to write
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into this path (missing path segments will be created, if necessary).
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If you enable profiling in more than one type of daemon, you must override
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it with an unique value like, the default is /var/log/swift/profile/account.profile.
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.IP "\fBdump_interval\fR"
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The profile data will be dumped to local disk based on above naming rule
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in this interval. The default is 5.0.
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.IP "\fBdump_timestamp\fR"
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Be careful, this option will enable profiler to dump data into the file with
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time stamp which means there will be lots of files piled up in the directory.
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The default is false
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.IP "\fBpath\fR"
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This is the path of the URL to access the mini web UI. The default is __profile__.
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.IP "\fBflush_at_shutdown\fR"
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Clear the data when the wsgi server shutdown. The default is false.
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.IP "\fBunwind\fR"
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Unwind the iterator of applications. Default is false.
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.RE
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.PD
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.SH ADDITIONAL SECTIONS
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.PD 1
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.RS 0
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The following sections are used by other swift-object services, such as replicator,
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updater, auditor.
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.IP "\fB[object-replicator]\fR"
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.RE
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.RS 3
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.IP \fBlog_name\fR
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Label used when logging. The default is object-replicator.
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.IP \fBlog_facility\fR
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Syslog log facility. The default is LOG_LOCAL0.
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.IP \fBlog_level\fR
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Logging level. The default is INFO.
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.IP \fBlog_address\fR
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Logging address. The default is /dev/log.
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.IP \fBdaemonize\fR
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Whether or not to run replication as a daemon. The default is yes.
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.IP "\fBrun_pause [deprecated]\fR"
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Time in seconds to wait between replication passes. The default is 30.
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.IP \fBinterval\fR
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Time in seconds to wait between replication passes. The default is 30.
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.IP \fBconcurrency\fR
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Number of replication workers to spawn. The default is 1.
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.IP \fBstats_interval\fR
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Interval in seconds between logging replication statistics. The default is 300.
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.IP \fBsync_method\fR
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The sync method to use; default is rsync but you can use ssync to try the
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EXPERIMENTAL all-swift-code-no-rsync-callouts method. Once ssync is verified
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as having performance comparable to, or better than, rsync, we plan to
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deprecate rsync so we can move on with more features for replication.
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.IP \fBrsync_timeout\fR
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Max duration of a partition rsync. The default is 900 seconds.
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.IP \fBrsync_io_timeout\fR
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Passed to rsync for I/O OP timeout. The default is 30 seconds.
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.IP \fBrsync_compress\fR
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Allow rsync to compress data which is transmitted to destination node
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during sync. However, this is applicable only when destination node is in
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a different region than the local one.
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NOTE: Objects that are already compressed (for example: .tar.gz, .mp3) might
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slow down the syncing process. The default is false.
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.IP \fBrsync_module\fR
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Format of the rysnc module where the replicator will send data. See
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etc/rsyncd.conf-sample for some usage examples. The default is empty.
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.IP \fBnode_timeout\fR
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Request timeout to external services. The default is 10 seconds.
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.IP \fBrsync_bwlimit\fR
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Passed to rsync for bandwidth limit in kB/s. The default is 0 (unlimited).
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.IP \fBhttp_timeout\fR
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Max duration of an HTTP request. The default is 60 seconds.
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.IP \fBlockup_timeout\fR
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Attempts to kill all workers if nothing replicates for lockup_timeout seconds. The
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default is 1800 seconds.
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.IP \fBring_check_interval\fR
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The default is 15.
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.IP \fBrsync_error_log_line_length\fR
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Limits how long rsync error log lines are. 0 (default) means to log the entire line.
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.IP \fBreclaim_age\fR
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Time elapsed in seconds before an object can be reclaimed. The default is
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604800 seconds.
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.IP "\fBrecon_cache_path\fR"
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The recon_cache_path simply sets the directory where stats for a few items will be stored.
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Depending on the method of deployment you may need to create this directory manually
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and ensure that swift has read/write.The default is /var/cache/swift.
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.IP "\fBhandoffs_first\fR"
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The flag to replicate handoffs prior to canonical partitions.
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It allows one to force syncing and deleting handoffs quickly.
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If set to a True value(e.g. "True" or "1"), partitions
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that are not supposed to be on the node will be replicated first.
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The default is false.
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.IP "\fBhandoff_delete\fR"
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The number of replicas which are ensured in swift.
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If the number less than the number of replicas is set, object-replicator
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could delete local handoffs even if all replicas are not ensured in the
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cluster. Object-replicator would remove local handoff partition directories
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after syncing partition when the number of successful responses is greater
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than or equal to this number. By default(auto), handoff partitions will be
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removed when it has successfully replicated to all the canonical nodes.
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The handoffs_first and handoff_delete are options for a special case
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such as disk full in the cluster. These two options SHOULD NOT BE
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CHANGED, except for such an extreme situations. (e.g. disks filled up
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or are about to fill up. Anyway, DO NOT let your drives fill up).
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.RE
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.RS 0
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.IP "\fB[object-reconstructor]\fR"
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.RE
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.RS 3
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.IP \fBlog_name\fR
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Label used when logging. The default is object-reconstructor.
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.IP \fBlog_facility\fR
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Syslog log facility. The default is LOG_LOCAL0.
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.IP \fBlog_level\fR
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Logging level. The default is INFO.
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.IP \fBlog_address\fR
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Logging address. The default is /dev/log.
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.IP \fBdaemonize\fR
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Whether or not to run replication as a daemon. The default is yes.
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.IP "\fBrun_pause [deprecated]\fR"
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Time in seconds to wait between replication passes. The default is 30.
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.IP \fBinterval\fR
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Time in seconds to wait between replication passes. The default is 30.
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.IP \fBconcurrency\fR
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Number of replication workers to spawn. The default is 1.
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.IP \fBstats_interval\fR
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Interval in seconds between logging replication statistics. The default is 300.
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.IP \fBnode_timeout\fR
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Request timeout to external services. The default is 10 seconds.
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.IP \fBhttp_timeout\fR
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Max duration of an HTTP request. The default is 60 seconds.
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.IP \fBlockup_timeout\fR
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Attempts to kill all workers if nothing replicates for lockup_timeout seconds. The
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default is 1800 seconds.
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.IP \fBring_check_interval\fR
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The default is 15.
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.IP \fBreclaim_age\fR
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Time elapsed in seconds before an object can be reclaimed. The default is
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604800 seconds.
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.IP "\fBrecon_cache_path\fR"
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The recon_cache_path simply sets the directory where stats for a few items will be stored.
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Depending on the method of deployment you may need to create this directory manually
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and ensure that swift has read/write.The default is /var/cache/swift.
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.IP "\fBhandoffs_first\fR"
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The flag to replicate handoffs prior to canonical partitions.
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It allows one to force syncing and deleting handoffs quickly.
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If set to a True value(e.g. "True" or "1"), partitions
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that are not supposed to be on the node will be replicated first.
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The default is false.
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.RE
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.PD
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|
|
|
.RS 0
|
|
.IP "\fB[object-updater]\fR"
|
|
.RE
|
|
.RS 3
|
|
.IP \fBlog_name\fR
|
|
Label used when logging. The default is object-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 1.
|
|
.IP \fBnode_timeout\fR
|
|
Request timeout to external services. The default is 10 seconds.
|
|
.IP \fBslowdown\fR
|
|
Slowdown will sleep that amount between objects. The default is 0.01 seconds.
|
|
.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
|
|
|
|
|
|
.RS 0
|
|
.IP "\fB[object-auditor]\fR"
|
|
.RE
|
|
.RS 3
|
|
.IP \fBlog_name\fR
|
|
Label used when logging. The default is object-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 \fBdisk_chunk_size\fR
|
|
The default is 65536.
|
|
.IP \fBfiles_per_second\fR
|
|
Maximum files audited per second. Should be tuned according to individual
|
|
system specs. 0 is unlimited. The default is 20.
|
|
.IP \fBbytes_per_second\fR
|
|
Maximum bytes audited per second. Should be tuned according to individual
|
|
system specs. 0 is unlimited. The default is 10000000.
|
|
.IP \fBconcurrency\fR
|
|
Number of reaper workers to spawn. The default is 1.
|
|
.IP \fBlog_time\fR
|
|
The default is 3600 seconds.
|
|
.IP \fBzero_byte_files_per_second\fR
|
|
The default is 50.
|
|
.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.
|
|
.IP \fBobject_size_stats\fR
|
|
Takes a comma separated list of ints. If set, the object auditor will
|
|
increment a counter for every object whose size is <= to the given break
|
|
points and report the result after a full scan.
|
|
.IP \fBrsync_tempfile_timeout\fR
|
|
Time elapsed in seconds before rsync tempfiles will be unlinked. Config value of "auto"
|
|
will try to use object-replicator's rsync_timeout + 900 or fall-back to 86400 (1 day).
|
|
.RE
|
|
|
|
|
|
|
|
|
|
.SH DOCUMENTATION
|
|
.LP
|
|
More in depth documentation about the swift-object-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-object-server(1),
|