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Allocation is an ongoing process based on flow or volume measurements, and gives the distribution of contributing sources, often with a final calculation per day, which in turn provides the basis for a daily production report in the case of a field that produces hydrocarbons.
Volume management treats each PV as being composed of a sequence of chunks called physical extents (PEs). Some volume managers (such as that in HP-UX and Linux) have PEs of a uniform size; others (such as that in Veritas) have variably-sized PEs that can be split and merged at will. Normally, PEs simply map one-to-one to logical extents (LEs ...
Volume is normally used for stand-alone field tanker loading operations, while mass is used for multi-field pipeline or offshore pipeline with an allocation requirement. Mass measurement and reporting are achieved by Measurement of volume flow rate (for example, by turbine or ultrasonic meter) and fluid density
Over-allocation or over-subscription is a mechanism that allows a server to view more storage capacity than has been physically reserved on the storage array itself. This allows flexibility in growth of storage volumes, without having to predict accurately how much a volume will grow. Instead, block growth becomes sequential.
XFS excels in the execution of parallel input/output (I/O) operations due to its design, which is based on allocation groups (a type of subdivision of the physical volumes in which XFS is used- also shortened to AGs). Because of this, XFS enables extreme scalability of I/O threads, file system bandwidth, and size of files and of the file system ...
To bring a volume group online, the "vgchange" tool: Searches for PVs in all available block devices. Parses the metadata header in each PV found. Computes the layouts of all visible volume groups. Loops over each logical volume in the volume group to be brought online and: Checks if the logical volume to be brought online has all its PVs visible.
Allocation of allowances in phases [12] Phase Period Description Allocation procedure Phase 1: 2005-2007: National allocation plans: auctioning or benchmark-based allocation Phase 2: 2008-2012 ~90% of allowances allocated for free: benchmark-based free allocation or auctioning (Germany, UK, Netherlands, Austria, Ireland, Hungary, Czech Republic ...
VTPR implements a correction to the pure component densities resp. volume. This volume translation corrects systematic deviations of the Peng–Robinson equation of state (PR EOS). The translation constant is obtained by determining the difference between the calculated density at T r =0.7 and the real value of the density obtained from ...