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$ osdmaptool --createsimple 3 myosdmap
osdmaptool: osdmap file 'myosdmap'
osdmaptool: writing epoch 1 to myosdmap
$ ORIG_FSID="$(osdmaptool --print myosdmap|grep ^fsid)"
$ osdmaptool --createsimple 3 myosdmap
osdmaptool: osdmap file 'myosdmap'
osdmaptool: myosdmap exists, --clobber to overwrite
[255]
# hasn't changed yet
#TODO typo
$ osdmaptool --print myosdmap
osdmaptool: osdmap file 'myosdmap'
epoch 1
fsid [0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12} (re)
created \d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d+ (re)
modified \d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d+ (re)
flags
pool 0 'data' rep size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 192 pgp_num 192 last_change 0 owner 0 crash_replay_interval 45
pool 1 'metadata' rep size 2 min_size 1 crush_ruleset 1 object_hash rjenkins pg_num 192 pgp_num 192 last_change 0 owner 0
pool 2 'rbd' rep size 2 min_size 1 crush_ruleset 2 object_hash rjenkins pg_num 192 pgp_num 192 last_change 0 owner 0
max_osd 3
$ NEW_FSID="$(osdmaptool --print myosdmap|grep ^fsid)"
$ [ "$ORIG_FSID" = "$NEW_FSID" ]
$ osdmaptool --createsimple 1 --clobber myosdmap
osdmaptool: osdmap file 'myosdmap'
osdmaptool: writing epoch 1 to myosdmap
$ osdmaptool --print myosdmap
osdmaptool: osdmap file 'myosdmap'
epoch 1
fsid [0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12} (re)
created \d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d+ (re)
modified \d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d+ (re)
flags
pool 0 'data' rep size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 64 pgp_num 64 last_change 0 owner 0 crash_replay_interval 45
pool 1 'metadata' rep size 2 min_size 1 crush_ruleset 1 object_hash rjenkins pg_num 64 pgp_num 64 last_change 0 owner 0
pool 2 'rbd' rep size 2 min_size 1 crush_ruleset 2 object_hash rjenkins pg_num 64 pgp_num 64 last_change 0 owner 0
max_osd 1
$ NEW_FSID="$(osdmaptool --print myosdmap|grep ^fsid)"
#TODO --clobber should probably set new fsid, remove the [1]
$ [ "$ORIG_FSID" != "$NEW_FSID" ]
[1]
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