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54 lines
1.5 KiB
Plaintext
54 lines
1.5 KiB
Plaintext
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pmds = parallel metadata server/system
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'test' is a standalone proccess that runs all clients, OSDs, and MDSs
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in a single process with a basic message passer (FakeMessenger).
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Useful for debugging.
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'pmds' uses MPI for communication.
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'import' builds a metadata store on ./osddata/ by taking find output
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from stdin. Make sure find is run from the current directory so that
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import can stat the files it's fed. The find root becomes the file
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system root; feel free to use relative paths.
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This is all GPL, etc.
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Getting started:
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1- Comment out the LEAKTRACER= line in the Makefile if you don't have
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LeakTracer installed (you probably don't).
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2- make (test and import targets are testing ones; pmds uses MPI)
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3- Build an OSD metadata store:
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# mkdir osddata
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# find /some/big/dir | ./import root
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4- Single proc sim:
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# ./test
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or more likely,
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# ./test > out
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5- Change parameters in config.cc.
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6- If you want stats logged, mkdir log (make sure you have enough
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file handles; there's one open file per client).
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Notes on pmds (MPI version):
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- On mcr/alc I have to
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# setenv LD_LIBRARY_PATH /usr/lib/mpi/mpi_gnu/lib
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for the GNU runtime MPI libs (otherwise you get the Intel ones,
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which segfault).
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- Each MDS and OSD gets its own node. Clients are divided over
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whatever is left over. So make sure you tell MPI to give you at
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least num_mds+num_osd+1 processes (num_mds etc defined in
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config.cc).
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2004.08.25 sage@newdream.net
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