Standby node name:
the Active / Passive
Primary / Standby
heartbeat:
Heartbeat
HA Resource:
IP, Service, STONITH
FailOver: failover
FailBack: Service cut back
resources tack: more inclined to resources which node to run
internal messaging cluster is based on UDP
Messaging Layer
Explorer CRM the Cluster the resource Manager
the DC: the Designated Coordinator
the PE: the Policy Engine
the TE: the Transaction
the DC: the PE the TE
the LRM: the Local the resource Manager
the HA structure diagram of
the LSB: Start | STOP | the restart | Status
the Linux Standard Base
the RA: the resource - Agent
resource group : RG resource Group
resource constraints: the constraint
alignment constraints coloation
whether a resource can be run on the same node score
value: together can be
a negative value: not together
location constraints lOCATION, score (score),
Value: This tends node
negative: this tends to escape from the node
(Order) constrained sequence
order in the resource definition to enable or disable
Resource isolation:
the node level: STONITH
resource level:
for example: FC SAN switch can be implemented in a storage resource level deny access node
The MySQL the HA
the VIP: the Float the IP
MySQL-Service
the Filesystem
when the split-brain cluster node can not effectively obtain information on the state of other nodes, generating split brain, one of the consequences shared storage seize
the Active / the Active
the Cluster GFS the OCFS2 the Filesystem
stored:
the DAS Direct Attached Storage
directly connected to the motherboard bus, bUS block level
NAS network attached storage file level
SAN storage area network
the FC SAN
the IP SAN
the SCSI: the Small Computer the System Interface
broadband 16: target available 15
narrowband 8: target available. 7
LUNs: the Logical Unit Number the
the iSCSI: the Internet the Small Computer the System IP-SAN Interface
DMA
controller: controller
adapter: adapter
clustered shared storage +
multipath storage multi-path
quorum disk
HA-Aware the Application
Watchdog: Watchdog
quorum: quorum
without_quorum_policy
freeze: Freeze
STOP
the ignore