49 lines
2.0 KiB
Plaintext
49 lines
2.0 KiB
Plaintext
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Building with DAOS API
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At step 1 above, one must specify "--with-daos". If the DAOS
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headers and libraries are not installed at respective system
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default locations, then one may also needs to set CPPFLAGS and
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LDFLAGS accordingly.
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Running with DAOS API
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---------------------
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One must specify an existing pool using "-O
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daospool=<pool_uuid>". IOR must be launched in a way that
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attaches the IOR process group to the DAOS server process group.
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One must also specify a container UUID using "-o
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<container_uuid>". If the "-E" option is given, then this UUID
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shall denote an existing container created by a "matching" IOR
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run. Otherwise, IOR will create a new container with this UUID.
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In the latter case, one may use uuidgen(1) to generate the UUID
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of the new container.
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When benchmarking write performance, one likely do not want
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"-W", which causes the write phase to do one additional memory
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copy for every I/O. This is due to IOR's assumption that when a
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DAOS_Xfer() call returns the buffer may be released. Therefore,
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random data is written when "-W" is absent, while data is copied
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from IOR buffers when "-W" is present.
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See doc/USER_GUIDE for all options and directives. Note that not
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all combinations of options are supported.
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Examples that should work include:
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- "ior -a DAOS -w -W -o <container_uuid> -O
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daospool=<pool_uuid>,daospoolsvc=<svc_ranks>" writes into a new container
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and verifies the data, using default daosRecordSize, transferSize,
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daosStripeSize, blockSize, daosAios, etc.
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- "ior -a DAOS -w -W -r -R -o <container_uuid> -b 1g -t 4m -C -O
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daospool=<pool_uuid>,daospoolsvc=<svc_ranks>,daosrecordsize=1m,
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daosstripesize=4m, daosstripecount=256,daosaios=8" does all IOR tests and
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shifts ranks during checkWrite and checkRead.
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- "ior -a DAOS -w -r -o <container_uuid> -b 8g -t 1m -C -O
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daospool=<pool_uuid>,daospoolsvc=<svc_ranks>,daosrecordsize=1m,daosstripesize=4m,
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daosstripecount=256,daosaios=8" may be a base to be tuned for performance
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benchmarking.
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