[dm-devel] dm-thin metadata: can two device_id's have the same transaction_id ?
Eric Wheeler
dm-devel at lists.ewheeler.net
Fri Mar 11 23:14:43 UTC 2016
Hello all,
For thin volumes shown in the lvm VG metadata backups in
/etc/lvm/backup/pool, can any two device_id's have the same
transaction_id, ever?
Otherwise, can I assume that the device_id and transaction_id are both
unique, or is only the tuple (transaction_id,device_id) unique?
For example:
my-thin-vol {
id = "M8fkBP-pFe8-Z6K0-0f7N-HAFM-Mv2v-KOTmM3"
status = ["READ", "WRITE", "VISIBLE"]
flags = ["ACTIVATION_SKIP"]
creation_host = "hv1.ewheeler.net"
creation_time = 1452374892 # 2016-01-09 13:28:12 -0800
segment_count = 1
segment1 {
start_extent = 0
extent_count = 3072 # 48 Gigabytes
type = "thin"
thin_pool = "data-pool"
>>>>>>>>>>>> transaction_id = 9843
device_id = 5735
origin = "backup2.ewheeler.net_14-drbd"
}
}
--
Eric Wheeler
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