Hi Daniel,
In short you can’t create a HDFS block with unallocated data. You can create a
zero length block, which will result in a zero byte file being created on the
data node, but you can’t create a sparse file in HDFS. While HDFS has a block
size e.g. 128MB if you create a small file then th
Thank Jim,
The scenario I have in mind is something like:
1) Ask HDFS to create a file that is 32k in length.
2) Attempt to read the contents of the file.
Can I even attempt to read the contents of a file that has not yet been
written? If so, what data would get sent?
For example, I asked a vers
Hi Danny,
This does depend on a number of circumstances, mostly based on file
permissions. If for example a file is deleted without the -skipTrash option
then it will be moved to the .Trash directory. From here it could be read, but
the original file permissions will be preserved. Therefore if a
Is it possible for a user with HDFS access to read the contents of a file
previously deleted by a different user?
I know a user can employ KMS to encrypt files with a personal key, making
this sort of data leakage effectively impossible. But, without KMS, is it
possible to allocate a file with uni
