copying
putting a remote file into hadoop without copying it to local disk
Try this (untested): cat test.txt | ssh username@masternode “hadoop dfs -put – hadoopFoldername/test.txt” I’ve used similar tricks to copy directories around: tar cf – . | ssh remote “(cd /destination && tar xvf -)” This sends the output of local-tar into the input of remote-tar.
In what cases should I use memcpy over standard operators in C++?
Efficiency should not be your concern. Write clean maintainable code. It bothers me that so many answers indicate that the memcpy() is inefficient. It is designed to be the most efficient way of copy blocks of memory (for C programs). So I wrote the following as a test: #include <algorithm> extern float a[3]; extern float … Read more
How to copy a huge table data into another table in SQL Server
I had the same problem, except I have a table with 2 billion rows, so the log file would grow to no end if I did this, even with the recovery model set to Bulk-Logging: insert into newtable select * from oldtable So I operate on blocks of data. This way, if the transfer is … Read more
How to Copy from IPython session without terminal prompts
You can use the %history magic to extract the interesting parts from your session. They will be shown in terminal without any of the junk. Example In [1]: import numpy as np In [2]: a = np.random(10) ————————————————————————— TypeError Traceback (most recent call last) <ipython-input-2-83ce219ad17b> in <module>() —-> 1 a = np.random(10) TypeError: ‘module’ object … Read more
Progress during large file copy (Copy-Item & Write-Progress?)
It seems like a much better solution to just use BitsTransfer, it seems to come OOTB on most Windows machines with PowerShell 2.0 or greater. Import-Module BitsTransfer Start-BitsTransfer -Source $Source -Destination $Destination -Description “Backup” -DisplayName “Backup”
How to copy files across computers using SSH and MAC OS X Terminal [closed]
You can do this with the scp command, which uses the ssh protocol to copy files across machines. It extends the syntax of cp to allow references to other systems: scp username1@hostname1:/path/to/file username2@hostname2:/path/to/other/file Copy something from this machine to some other machine: scp /path/to/local/file username@hostname:/path/to/remote/file Copy something from another machine to this machine: scp username@hostname:/path/to/remote/file … Read more
How do I copy the contents of one stream to another?
From .NET 4.5 on, there is the Stream.CopyToAsync method input.CopyToAsync(output); This will return a Task that can be continued on when completed, like so: await input.CopyToAsync(output) // Code from here on will be run in a continuation. Note that depending on where the call to CopyToAsync is made, the code that follows may or may … Read more