# Maximum number of concurrent requests to process concurrently
# in a single service process, or 0 for no limit.
- MaxConcurrentRequests: 8
+ #
+ # Note this applies to all Arvados services (controller, webdav,
+ # websockets, etc.). Concurrency in the controller service is
+ # also effectively limited by MaxConcurrentRailsRequests (see
+ # below) because most controller requests proxy through to the
+ # RailsAPI service.
+ MaxConcurrentRequests: 64
+
+ # Maximum number of concurrent requests to process concurrently
+ # in a single RailsAPI service process, or 0 for no limit.
+ MaxConcurrentRailsRequests: 8
# Maximum number of incoming requests to hold in a priority
# queue waiting for one of the MaxConcurrentRequests slots to be
# A price factor of 1.0 is a reasonable starting point.
PreemptiblePriceFactor: 0
+ # When the lowest-priced instance type for a given container is
+ # not available, try other instance types, up to the indicated
+ # maximum price factor.
+ #
+ # For example, with AvailabilityPriceFactor 1.5, if the
+ # lowest-cost instance type A suitable for a given container
+ # costs $2/h, Arvados may run the container on any instance type
+ # B costing $3/h or less when instance type A is not available
+ # or an idle instance of type B is already running.
+ MaximumPriceFactor: 1.5
+
# PEM encoded SSH key (RSA, DSA, or ECDSA) used by the
# cloud dispatcher for executing containers on worker VMs.
# Begins with "-----BEGIN RSA PRIVATE KEY-----\n"