Using EOS at the LPC: Additional Commands
This is a secondary set of possibly useful EOS commands. Go to Using EOS at the LPC to find instructions for basic EOS use and operations.
Where do I find more information about EOS commands available?
- Using EOS at the LPC
- Keep in mind all the things you things you should NOT do on the CMS LPC EOS
- From the interactive node command line:
eos root://cmseos.fnal.gov command --help, where
commandis the command such as
- EOS at CERN knowledgebase, be aware that CERN may be running a more recent version of EOS than the CMS LPC
What are some useful scripts for EOS?
- Kevin Pedro's github utilities, see eosdu in particular
chmod 755 eosdu
./eosdu -h /store/user/username
./eosdu.sh -rh /store/user/lpcgroupname
- There are some useful scripts in the github.com/FNALLPC/lpc-scripts area
- The xrdcpRecursive.py script can be used to copy multiple files from user filesystems to the cmslpc EOS
- The recursiveFileList.py script is used by the xrdcpRecursive.py script above
- From the interactive node command line type
aliasto find out what commands are aliased for your login
[username@cmslpc39 WorkDir]$ alias eosgrpquota eos root://cmseos.fnal.gov quota | grep -A4 eosls eos root://cmseos.fnal.gov ls eosmkdir eos root://cmseos.fnal.gov mkdir eosquota eos root://cmseos.fnal.gov quota | grep -B4 `whoami` eosrm eos root://cmseos.fnal.gov rm xrdfsls xrdfs root://cmseos.fnal.gov ls
What are some errors and fixes for EOS?
- Certain versions of CMSSW environment (CMSSW_9_2_4) may cause problems with the commands, giving an error such as:
[username@cmslpc25 ~]$ eosls /store/user/CERNusername eos: symbol lookup error: eos: undefined symbol: _ZN5XrdCl4File4OpenERKSsNS_9OpenFlags5FlagsENS_6Access4ModeEt
- Solve this error by doing the commands in a new terminal without a CMSSW environment
- This should not affect
- If you changed shell by hand, the eos aliases (
eosquota, etc.) are not loaded
- Do the commands from a new login shell or request a new default login shell
How do I use EOS commands at the LPC on the interactive node command line?
cmslpc-sl6.fnal.gov, use eos commands with this structure (where
command is the eos command you put in yourself. These
eos root://cmseos.fnal.gov commands only work on the interactive nodes and not the condor worker nodes.
[username@cmslpc37 ~]$ eos root://cmseos.fnal.gov command
Examples with the EOS find command:
du type commandThis provides all files there with respective size. You can pipe this to a grep to do selection.
eos root://cmseos.fnal.gov find --size
find with xurlThis runs find and gives the xurl path
eos root://cmseos.fnal.gov find --xurl
find with countThis maxes out at 100,000 files. All "user" find commands are limited to 100,000 lines of output. Note that sysadmins don't have this limit, so if more information is required, one can contact LPC Computing support to get the information from the sysadmins.
eos root://cmseos.fnal.gov find --count
find with childcountThis counts number of a files in a directory, use with a directory -d
eos root://cmseos.fnal.gov find --childcount -d /store/user/usernameGiven that all "user" find commands are limited to 100,000 lines of output, we use the following example to not count too many subdirectories deep:
eos root://cmseos.fnal.gov find --childcount -d --maxdepth 1 /store/user/username
find by ageThis finds files older than 365 days in a directory
eos root://cmseos.fnal.gov find -ctime +365 /store/user/lpcgroupname
More EOS copy options:
eos root://cmseos.fnal.gov cp --help
cp example one file:
eos cp root://cmseos.fnal.gov///store/user/differentuser/miniaod.root root://cmseos.fnal.gov//store/user/tonjes/miniaodCopy.root
cp recursive:This will work with the local path, can copy local to remote.
eos root://cmseos.fnal.gov cp --recursive
cp example directory recursive:Note that the
/at the end of the directory name is essential in formatting this command:
eos cp -r root://cmseos.fnal.gov//store/user/cmsdas/2014/ root://cmseos.fnal.gov//store/user/belt/cmsdas/
cp xrdcp many files:To copy many files at the end of a condor batch job for instance, we have: for i in *.root; do xrdcp $i root://cmeos.fnal.gov//store/user/lpcgroupname/MyAnalysis/$i;. However, you can instead use xrdcp recursive, this is from the man page on xrootd.org:
xrdcp -r | --recursiverecursively copy all files starting at the given source directory. This option is only supported for local files.
EOS file renaming and moving:
EOS file renameIf you want to just rename a folder/file without copying inside eos, i.e., change metadata:
eos root://cmseos.fnal.gov file rename
EOS file move options
eos root://cmseos.fnal.gov mv --help eos root://cmseos.fnal.gov mv /store/user/tonjes/step4_test.root /store/group/lpcci2dileptons/tonjes_test.root
EOS and xrootd:Note that these are both xrootd access methods and fine at the cmslpc. Non-xrootd commands should never use /eos/uscms.
FNAL EOS and CERN EOS access at either site:Here are some examples on how to access CERN EOS files at FNAL:
[username@cmslpc27 ~]$ eos root://eoscms.cern.ch/ ls /store/user
How to access FNAL EOS files at CERN:
[username@lxplus095 ~]$ eos root://cmseos.fnal.gov ls /store/user
Checksum files on EOS:One can do checksum with
xrdcp(which copies the file while calculating checksum), as well as
xrootd(does not copy the file).
Two examples (note the long command - scroll right):
xrdcpcopies the file, here it copies it locally (
.), which may not be ideal depending on the file size.
[username@cmslpc29 CMSSW_9_2_4]$ xrdcp --cksum md5:print root://cmseos.fnal.gov//store/user/drberry/dynlo.lhe . [248.8MB/248.8MB][100%][==================================================][41.46MB/s] md5: 87ee2aedc42926e66d0041645c2ceba4 .//dynlo.lhe 260873891Check your local copy like this:
[tonjes@cmslpc27 ~]$ md5sum dynlo.lhe 87ee2aedc42926e66d0041645c2ceba4 dynlo.lhe
xrootdcalculates the adler32 checksum:
[username@cmslpc29 CMSSW_9_2_4]$ xrdfs root://cmseos.fnal.gov//store/user/drberry/dynlo.lhe query checksum /store/user/drberry/dynlo.lhe eos 1e053b51Check your local copy like this:
[tonjes@cmslpc27 ~]$ adler32 dynlo.lhe 1e053b51