File Systems on Phoenix
Contents
User home directories as well as some system directories are
located in a Network File Service (NFS) that is accessible from
Phoenix.
Because the NFS servers are outside Phoenix, NFS does not provide
the highest performance. For fast file access on Phoenix, see
"Work Space", below.
Each user has a default storage limit of 500 MB in their home
directory. In addition to the ".yesterday" backup described
below, home directories in NFS are copied to tape backup four times a
week.
To find your quota and usage
in NFS, use the following command
$ lsquota ~
Fileset Name Quota Used Used Aggregate
us.user 500000 407726 81% 89% = 22865076/25574421
(LFS)
Each home directory has a default set of subdirectories:
public |
This directory is world readable. Use it to make files available to
other CCS users. |
private |
This directory is only accessible by the user. |
.yesterday |
This directory contains a read-only copy of all the rest of the
home directory, including other subdirectories, as of the day
before. The copy is generated at 4AM each morning. If you
accidentally delete any of your NFS files, you can simply copy
versions from the day before out of ".yesterday". You
cannot directly create or remove files from the ".yesterday"
directory. |
bin |
This directory is a location for user-generated executables. It is
not in your "PATH" by default, however. You can add it or one
if its subdirectories to your "PATH" in your ".profile"
or ".cshrc" file. |
www |
Documents kept in this directory are available
over the World-Wide Web provided the permissions allow readability.
These files can be accessed from
"http://www.ccs.ornl.gov/~user". |
Local work space is available on Phoenix for temporary files
and for staging large files from and to HPSS. The space is not backed up, and it is purged to help ensure that adequate work space
is available for new jobs. Files that have not been accessed for more
than a week are considered eligible for purging.
Each Phoenix user has a separate directory in the work space:
/tmp/work/$USER
The path "/tmp/work/$USER" is available on all CCS systems,
but it points to a different filesystem on each system. Each one is
local to that respective system.
Do not create files directly in the "/tmp" directory!
"/tmp/work/$USER" is actually a symbolic link to a completely
different filesystem (like "/scratch/scr4tb/$USER"). The
"/tmp" filesystem itself is quite small, and, when /tmp fills up, system problems result.
The High-Performance Storage System (HPSS) provides archival
storage. It is "high performance" relative to other archival systems, not
relative to native file systems. Large permanent files should
be moved directly from "/tmp/work/$USER", presumably where they were created,
to HPSS.
You access HPSS through the "hsi" and "htar" interfaces.
The CCS is moving to one-time passwords (OTPs) for authentication. Once this
occurs, "hsi" will require an OTP for each connection, so it will not
work within batch scripts. Please contact
"consult@ccs.ornl.gov" if you need password-free access to
"hsi" on Phoenix.
For more information on HPSS and "hsi", type "hsi help"
on Phoenix or see the online documentation, available at the
following URL.
For more information on "htar", see "man htar" on
Phoenix or see the online documentation, available at the following
URL.
HPSS is unavailable during weekly maintenance, which
occurs Wednesday mornings, typically 7AM-10AM.
phoenix
| ram
| cheetah
| eagle
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