openstack/swift
Code Issues Proposed changes

Replace replication_one_per_device by custom count

Browse Source 
This commit replaces boolean replication_one_per_device by an integer
replication_concurrency_per_device. The new configuration parameter is
passed to utils.lock_path() which now accept as an argument a limit for
the number of locks that can be acquired for a specific path.

Instead of trying to lock path/.lock, utils.lock_path() now tries to lock
files path/.lock-X, where X is in the range (0, N), N being the limit for
the number of locks allowed for the path. The default value of limit is
set to 1.

Change-Id: I3c3193344c7a57a8a4fc7932d1b10e702efd3572
This commit is contained in:
Romain LE DISEZ
2016-10-26 10:53:46 +02:00
committed by Alistair Coles
parent 49dd146068
commit e199192cae
11 changed files with 351 additions and 150 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
doc/manpages/object-server.conf.5
View File

@@ -225,11 +225,12 @@ should not specify any value for "replication_server".
Set to restrict the number of concurrent incoming SSYNC requests
Set to 0 for unlimited (the default is 4). Note that SSYNC requests are only used
by the object reconstructor or the object replicator when configured to use ssync.
.IP "\fBreplication_one_per_device\fR"
Restricts incoming SSYNC requests to one per device,
replication_currency above allowing. This can help control I/O to each
device, but you may wish to set this to False to allow multiple SSYNC
requests (up to the above replication_concurrency setting) per device. The default is true.
.IP "\fBreplication_concurrency_per_device\fR"
Set to restrict the number of concurrent incoming SSYNC requests per device;
set to 0 for unlimited requests per devices. This can help control I/O to each
device. This does not override replication_concurrency described above, so you
may need to adjust both parameters depending on your hardware or network
capacity. Defaults to 1.
.IP "\fBreplication_lock_timeout\fR"
Number of seconds to wait for an existing replication device lock before
giving up. The default is 15.