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Top Forums UNIX for Advanced & Expert Users Why is editing a file by renaming the new one safer? Post 303042579 by MadeInGermany on Monday 30th of December 2019 11:04:48 AM
Old 12-30-2019
They mean: copying a file, especially a big file, is done in steps. If there is a power loss in between, the status of the file is unknown: can be empty or partially copied.
In contrast, renaming/moving a file is "atomic": after a power loss it's either 100% the new file or 100% the old file.

But with a copy speed of >100 Mbyte per second and "journaling" it is a bit paranoid to assume a power loss within these microseconds, IMHO.
So that's why I prefer to keep the inode intact (including attributes and link count), and simply assume that power will last for the next microseconds.
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MPSCNNLossDataDescriptor(3)				 MetalPerformanceShaders.framework			       MPSCNNLossDataDescriptor(3)

NAME
MPSCNNLossDataDescriptor SYNOPSIS
#import <MPSCNNLoss.h> Inherits NSObject, and <NSCopying>. Instance Methods (nonnull instancetype) - init Class Methods (nullable MPSCNNLossDataDescriptor *) + cnnLossDataDescriptorWithData:layout:size: Properties MPSDataLayout layout MTLSize size NSUInteger bytesPerRow NSUInteger bytesPerImage Detailed Description This depends on Metal.framework. The MPSCNNLossDataDescriptor specifies a loss data descriptor. The same descriptor can be used to initialize both the labels and the optional weights data. Method Documentation + (nullable MPSCNNLossDataDescriptor*) cnnLossDataDescriptorWithData: (NSData *__nonnull) data(MPSDataLayout) layout(MTLSize) size Make a descriptor loss data. The bytesPerRow and bytesPerImage are automatically calculated assuming a dense array. If it is not a dense array, adjust bytesPerRow and bytesPerImage to the right value by changing properties. Parameters: data The per-element loss data. The data must be in floating point format. layout The data layout of loss data. size The size of loss data. Returns: A valid MPSCNNLossDataDescriptor object or nil, if failure. - (nonnull instancetype) init Property Documentation - bytesPerImage [read], [write], [nonatomic], [assign] Slice bytes of loss data. This parameter specifies the slice bytes of loss data. - bytesPerRow [read], [write], [nonatomic], [assign] Row bytes of loss data. This parameter specifies the row bytes of loss data. - layout [read], [nonatomic], [assign] Data layout of loss data. See MPSImage.h for more information. This parameter specifies the layout of loss data. - size [read], [nonatomic], [assign] Size of loss data: (width, height, feature channels}. This parameter specifies the size of loss data. Author Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code. Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSCNNLossDataDescriptor(3)
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