gholt c859ebf5ce Per device replication_lock ... New replication_one_per_device (True by default) that restricts incoming REPLICATION requests to one per device, replication_currency allowing. Also has replication_lock_timeout (15 by default) to control how long a request will wait to obtain a replication device lock before giving up. This should be very useful in that you can be assured any concurrent REPLICATION requests are each writing to distinct devices. If you have 100 devices on a server, you can set replication_concurrency to 100 and be confident that, even if 100 replication requests were executing concurrently, they'd each be writing to separate devices. Before, all 100 could end up writing to the same device, bringing it to a horrible crawl. NOTE: This is only for ssync replication. The current default rsync replication still has the potentially horrible behavior. Change-Id: I36e99a3d7e100699c76db6d3a4846514537ff685		2013-11-22 21:40:29 +00:00
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manpages	Merge "Faster swift-dispersion-populate"	2013-10-22 17:55:59 +00:00
source	Per device replication_lock	2013-11-22 21:40:29 +00:00