HP StorageWorks Storage Mirroring for Linux User's Guide (T2558-96317, June 2009)

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9
Managing Connections
A unique connection ID is associated with each Storage Mirroring
connection. The connection ID provides a reference point for each
connection. The connection ID is determined by sequential numbers
starting at one (1). Each time a connection is established, the ID counter is incremented. It is reset
back to one each time the Storage Mirroring daemon is restarted. For example, if the Storage
Mirroring daemon was started and the same replication set was connected to five target machines,
each connection would have a unique connection ID from 1 to 5.
The connection can be in various states as described in the following table.
This chapter covers several connection related activities.
 Monitoring connections on page 9-2
 Monitoring the message window on page 9-6
 Queuing Storage Mirroring data on page 9-8
 Configuring automatic reconnections on page 9-12
 Disconnecting a connection on page 9-13
Connection
Status
Description
Started The network connection exists and is available for data transmission. Replication
and mirror data are transmitted to the target as soon as possible. This is the
standard state that you will see most often.
Stopped Storage Mirroring has linked the source and target, but the network connection
does not exist. Replication and mirror data are not transmitted to the target but
are held in queue on the source.
Paused The network connection exists and is available for data transmission, but the
replication and mirror data is being held in a queue and is not being transmitted
to the target.
Scheduled Storage Mirroring has linked the source and target, but the network connection is
not established until event driven or scheduling criteria have been met.
Error A transmission error has occurred. Possible errors include a broken physical line
or a failed target daemon.