File mode

See merge request zdvresearch_bsc/adafs!32

Since POSIX.1-2001 the S_IFMT (0170000) bitmask of the file mode must
contain the file type.

At the moment we correctly support
 - [S_IFREG] regular file
 - [S_IFDIR] directory

Previously, clients would look for the daemon by name which was not robust.
If the daemon was started with valgrind for example, clients would not find
the daemon.

Similar to other applications a daemon now creates a pid file with
information about its pid and its started mountdir.

Proper errorhandling on server and client side was added.

Multiple daemons per node are explicitly not allowed for now!

Previously, we gave already installed libfabric versions no chance
to be detected over exclusively installed libfabric

Resolve "Separate metadata and data directories"

Closes #36

See merge request zdvresearch_bsc/adafs!15

Review and fixes that died when rebasing all commits

Nafi3 authored Mar 12, 2018 and Marc Vef committed Mar 23, 2018

This commit gives new options regarding separation of metadir and rootdir location. If only rootdir destination is given both metadata and data is stored at the same path

Adding optional JeMalloc dependency + rocksdb version bump

See merge request zdvresearch_bsc/adafs!27

Fix misaligned operations

See merge request zdvresearch_bsc/adafs!28

target was the index of the cycle and target[target] was the actual
identifier of the target. In some part of the code target was considered
as the identifier directly.

Now the index of the cycle is i and target is the actual identifier of
the target.

The calculus (on clients) about the last chunk involved into a
write/read operation was bugged.

A new blocks_calc_util library has been introduced in order to make
easier to perform this kind of calculus.

startup script: do not check for local daemon

See merge request zdvresearch_bsc/adafs!30

In the case the host running the startup script is not one of the node
that will run adafs it does not make sense to check for the binary of
the daemon locally.

When rocksdb is build with jemalloc linking with adafs was failing

Preload: Better naming in IO process + chnk_end target fix

See merge request zdvresearch_bsc/adafs!25

Resolve "Remove all chunks when a file is removed"

Closes #34

See merge request zdvresearch_bsc/adafs!22

bugfix: dl_script with non-existing output path

See merge request zdvresearch_bsc/adafs!23

Client io cleanup

See merge request zdvresearch_bsc/adafs!24