release notes
| Book:
1.9.5,
1.9.12 (opt, FHS),
2.11 (FHS),
2.12 (FHS),
2.13 (FHS),
2.14 (FHS),
| Wiki
| Q&A
For the subsequent examples we assume a basic PoolManager
setup :
# # define the units # psu create -protocol */* psu create -protocol xrootd/* psu create -net 0.0.0.0/0.0.0.0 psu create -net 131.169.0.0/255.255.0.0 psu create -store *@* # # define unit groups # psu create ugroup any-protocol psu create ugroup any-store psu create ugroup world-net psu create ugroup xrootd # psu addto ugroup any-protocol */* psu addto ugroup any-store *@* psu addto ugroup world-net 0.0.0.0/0.0.0.0 psu addto ugroup desy-net 131.169.0.0/255.255.0.0 psu addto ugroup xrootd xrootd/* # # define the pools # psu create pool <poolName> psu create pool <...> # # define the pool groups # psu create pgroup default-pools psu create pgroup special-pools # psu addto pgroup default-pools <poolName> psu addto pgroup default-pools <...> # psu addto pgrou specail-pools <poolName> psu addto pgroup special-pools <...>
For a special set of pools, where we only allow the xrootd
protocol, we don’t want the datasets to be replicated on high
load while for the rest of the pools we allow replication on
hot spot detection.
# # pm set default -p2p=0.4 pm set xrootd-section -p2p=0.0 # psu create link default-link any-protocol any-store world-net psu add link default-link default-pools psu set link default-link -readpref=10 -cachepref=10 -writepref=0 # psu create link xrootd-link xrootd any-store world-net psu add link xrootd-link special-pools psu set link xrootd-link -readpref=11 -cachepref=11 -writepref=0 psu set link xrootd-link -section=xrootd-section #
For the a set of pools we select pools following the default
setting of cpu and space related cost factors. For incoming
trafic from outside, though, we select the same pools, but in
a randomly distributed fashion. Please
note that this is not really a physical partitioning of the
dCache system, but rather a virtual one, applied to the same
set of pools.
# # pm set default -cpucostfactor=0.2 -spacecostfactor=1.0 pm set incoming-section -cpucostfactor=0.0 -spacecostfactor=0.0 # psu create link default-link any-protocol any-store desy-net psu add link default-link default-pools psu set link default-link -readpref=10 -cachepref=10 -writepref=10 # psu create link default-link any-protocol any-store world-net psu add link default-link default-pools psu set link default-link -readpref=10 -cachepref=10 -writepref=0 # psu create link incoming-link any-protocol any-store world-net psu add link incoming-link default-pools psu set link incoming-link -readpref=10 -cachepref=10 -writepref=10 psu set link incoming-link -section=incoming-section #