Merge "Replace replication_one_per_device by custom count"
This commit is contained in:
Zuul
@@ -225,11 +225,12 @@ should not specify any value for "replication_server".
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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_concurrency_per_device\fR"
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Set to restrict the number of concurrent incoming SSYNC requests per device;
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set to 0 for unlimited requests per devices. This can help control I/O to each
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device. This does not override replication_concurrency described above, so you
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may need to adjust both parameters depending on your hardware or network
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capacity. Defaults to 1.
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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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@@ -563,119 +563,119 @@ ionice_priority None I/O scheduling priority of server
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[object-server]
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***************
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============================= ====================== ===============================================
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Option Default Description
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----------------------------- ---------------------- -----------------------------------------------
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use paste.deploy entry point for the
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object server. For most cases,
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this should be
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`egg:swift#object`.
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set log_name object-server Label used when logging
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set log_facility LOG_LOCAL0 Syslog log facility
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set log_level INFO Logging level
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set log_requests True Whether or not to log each
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request
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set log_address /dev/log Logging directory
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user swift User to run as
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max_upload_time 86400 Maximum time allowed to upload an
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object
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slow 0 If > 0, Minimum time in seconds for a PUT or
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DELETE request to complete. This is only
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useful to simulate slow devices during testing
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and development.
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mb_per_sync 512 On PUT requests, sync file every
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n MB
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keep_cache_size 5242880 Largest object size to keep in
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buffer cache
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keep_cache_private false Allow non-public objects to stay
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in kernel's buffer cache
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allowed_headers Content-Disposition, Comma separated list of headers
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Content-Encoding, that can be set in metadata on an object.
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X-Delete-At, This list is in addition to
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X-Object-Manifest, X-Object-Meta-* headers and cannot include
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X-Static-Large-Object Content-Type, etag, Content-Length, or deleted
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auto_create_account_prefix . Prefix used when automatically
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creating accounts.
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replication_server Configure parameter for creating
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specific server. To handle all verbs,
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including replication verbs, do not
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specify "replication_server"
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(this is the default). To only
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handle replication, set to a True
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value (e.g. "True" or "1").
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To handle only non-replication
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verbs, set to "False". Unless you
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have a separate replication network, you
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should not specify any value for
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"replication_server".
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replication_concurrency 4 Set to restrict the number of
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concurrent incoming SSYNC
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requests; set to 0 for unlimited
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replication_one_per_device True Restricts incoming SSYNC
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requests to one per device,
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replication_currency above
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allowing. This can help control
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I/O to each device, but you may
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wish to set this to False to
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allow multiple SSYNC
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requests (up to the above
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replication_concurrency setting)
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per device.
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replication_lock_timeout 15 Number of seconds to wait for an
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existing replication device lock
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before giving up.
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replication_failure_threshold 100 The number of subrequest failures
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before the
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replication_failure_ratio is
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checked
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replication_failure_ratio 1.0 If the value of failures /
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successes of SSYNC
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subrequests exceeds this ratio,
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the overall SSYNC request
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will be aborted
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splice no Use splice() for zero-copy object
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GETs. This requires Linux kernel
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version 3.0 or greater. If you set
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"splice = yes" but the kernel
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does not support it, error messages
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will appear in the object server
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logs at startup, but your object
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servers should continue to function.
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nice_priority None Scheduling priority of server processes.
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Niceness values range from -20 (most
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favorable to the process) to 19 (least
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favorable to the process). The default
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does not modify priority.
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ionice_class None I/O scheduling class of server processes.
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I/O niceness class values are IOPRIO_CLASS_RT
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(realtime), IOPRIO_CLASS_BE (best-effort),
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and IOPRIO_CLASS_IDLE (idle).
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The default does not modify class and
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priority. Linux supports io scheduling
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priorities and classes since 2.6.13 with
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the CFQ io scheduler.
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Work only with ionice_priority.
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ionice_priority None I/O scheduling priority of server
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processes. I/O niceness priority is
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a number which goes from 0 to 7.
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The higher the value, the lower the I/O
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priority of the process. Work only with
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ionice_class.
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Ignored if IOPRIO_CLASS_IDLE is set.
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eventlet_tpool_num_threads auto The number of threads in eventlet's thread pool.
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Most IO will occur in the object server's main
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thread, but certain "heavy" IO operations will
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occur in separate IO threads, managed by
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eventlet.
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The default value is auto, whose actual value
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is dependent on the servers_per_port value.
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If servers_per_port is zero then it uses
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eventlet's default (currently 20 threads).
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If the servers_per_port is nonzero then it'll
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only use 1 thread per process.
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This value can be overridden with an integer
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value.
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============================= ====================== ===============================================
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================================== ====================== ===============================================
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Option Default Description
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---------------------------------- ---------------------- -----------------------------------------------
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use paste.deploy entry point for the
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object server. For most cases,
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this should be
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`egg:swift#object`.
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set log_name object-server Label used when logging
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set log_facility LOG_LOCAL0 Syslog log facility
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set log_level INFO Logging level
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set log_requests True Whether or not to log each
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request
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set log_address /dev/log Logging directory
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user swift User to run as
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max_upload_time 86400 Maximum time allowed to upload an
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object
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slow 0 If > 0, Minimum time in seconds for a PUT or
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DELETE request to complete. This is only
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useful to simulate slow devices during testing
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and development.
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mb_per_sync 512 On PUT requests, sync file every
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n MB
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keep_cache_size 5242880 Largest object size to keep in
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buffer cache
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keep_cache_private false Allow non-public objects to stay
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in kernel's buffer cache
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allowed_headers Content-Disposition, Comma separated list of headers
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Content-Encoding, that can be set in metadata on an object.
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X-Delete-At, This list is in addition to
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X-Object-Manifest, X-Object-Meta-* headers and cannot include
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X-Static-Large-Object Content-Type, etag, Content-Length, or deleted
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auto_create_account_prefix . Prefix used when automatically
|
||||
creating accounts.
|
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replication_server Configure parameter for creating
|
||||
specific server. To handle all verbs,
|
||||
including replication verbs, do not
|
||||
specify "replication_server"
|
||||
(this is the default). To only
|
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handle replication, set to a True
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value (e.g. "True" or "1").
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To handle only non-replication
|
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verbs, set to "False". Unless you
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have a separate replication network, you
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should not specify any value for
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"replication_server".
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replication_concurrency 4 Set to restrict the number of
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concurrent incoming SSYNC
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requests; set to 0 for unlimited
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replication_concurrency_per_device 1 Set to restrict the number of
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concurrent incoming SSYNC
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requests per device; set to 0 for
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unlimited requests per devices.
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This can help control I/O to each
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device. This does not override
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replication_concurrency described
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||||
above, so you may need to adjust
|
||||
both parameters depending on your
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hardware or network capacity.
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replication_lock_timeout 15 Number of seconds to wait for an
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existing replication device lock
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before giving up.
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replication_failure_threshold 100 The number of subrequest failures
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before the
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replication_failure_ratio is
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checked
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replication_failure_ratio 1.0 If the value of failures /
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successes of SSYNC
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subrequests exceeds this ratio,
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the overall SSYNC request
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will be aborted
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splice no Use splice() for zero-copy object
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GETs. This requires Linux kernel
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version 3.0 or greater. If you set
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"splice = yes" but the kernel
|
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does not support it, error messages
|
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will appear in the object server
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logs at startup, but your object
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servers should continue to function.
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nice_priority None Scheduling priority of server processes.
|
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Niceness values range from -20 (most
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favorable to the process) to 19 (least
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favorable to the process). The default
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does not modify priority.
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ionice_class None I/O scheduling class of server processes.
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I/O niceness class values are IOPRIO_CLASS_RT
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(realtime), IOPRIO_CLASS_BE (best-effort),
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and IOPRIO_CLASS_IDLE (idle).
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The default does not modify class and
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||||
priority. Linux supports io scheduling
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||||
priorities and classes since 2.6.13 with
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the CFQ io scheduler.
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Work only with ionice_priority.
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ionice_priority None I/O scheduling priority of server
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processes. I/O niceness priority is
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a number which goes from 0 to 7.
|
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The higher the value, the lower the I/O
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priority of the process. Work only with
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ionice_class.
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Ignored if IOPRIO_CLASS_IDLE is set.
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eventlet_tpool_num_threads auto The number of threads in eventlet's thread pool.
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Most IO will occur in the object server's main
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thread, but certain "heavy" IO operations will
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occur in separate IO threads, managed by
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eventlet.
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The default value is auto, whose actual value
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is dependent on the servers_per_port value.
|
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If servers_per_port is zero then it uses
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eventlet's default (currently 20 threads).
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If the servers_per_port is nonzero then it'll
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only use 1 thread per process.
|
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This value can be overridden with an integer
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value.
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||||
================================== ====================== ===============================================
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||||
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||||
*******************
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||||
[object-replicator]
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