When rolling back a subvolume to a snapshot in btrfs, is simply renaming and keeping the old subvolume bad practice?

I’m new to btrfs. I’m experimenting with snapshots and rollbacks. I read the answers here: Conceptualizing btrfs – understanding snapshots, and space used btrfs confused about subvolumes Online remount btrfs of root filesystem with different subvolume (snapshot) I still don’t get it. My subvolid=0 is not mounted at boot. Instead, I have three subvolumes mounted…

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How to modify aco to include traffic in consideration?

I have a code where find_edge function uses Roulette Wheel Algorithm to select next appropriate edge. Which is based on following equation : available_edge += ((2.0 – self.distance[self.ant[i].get_position()][e]) ** self.alpha) * ( (1.0 – self.pheromones[self.ant[i].get_position()][e]) ** self.beta) How to modify this fitness function which results in selecting edge having less distance and traffic density?

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cgroups: block write bytes stats in blkio.throttle.io_service_bytes file leaks to it’s parent group in some case

I create a cgroup under /sys/fs/cgroup/blkio/usertest, and add current shell into this group. I use the following dd command to test the behavior of blkio.throttle.io_service_bytes file. I found the data will leak into the parent group in some case. before dd: cat /sys/fs/cgroup/blkio/usertest/blkio.throttle.io_service_bytes 253:0 Read 32768 253:0 Write 9466880 253:0 Sync 9442304 253:0 Async 57344…

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Where do lifecycle methods, and other methods, get their parameter values?

In the following Android lifecycle method: @Override public View onCreateView( LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = super.onCreateView(inflater, container, savedInstanceState); … return view; } onCreateView takes in a ‍‍‍‍‍‍‍‍‍‍LayoutInflater, @Nullable Viewgroup, and a @Nullable Bundle. The issue I have is in the sample program I am referring to: sceneform-android-sdk There…

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Function to convert a value ex: 58K or 5m in a column into 58000 or 500000 in pandas

def convert(x): col_number = 0 if ‘K’ in x: col_number = int(x.replace(‘K’, ”)) * 1000 elif ‘k’ in x: col_number = int(x.replace(‘k’, ”)) * 1000 if ‘M’ in x: col_number = int(x.replace(‘M’, ”)) * 1000000 elif ‘m’ in x: col_number = int(x.replace(‘m’, ”)) * 1000000 else: col_number = int(x) return int(col_number)

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