Hp Storage Mirroring V5.1 Software Manuel d'utilisateur Page 116
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DNS
When Storage Mirroring failover occurs, DNS is not automatically updated. If the end-users use DNS
to resolve server names and the source IP address was not failed over to the target, additional DNS
updates will be required because the host records for the source will remain intact after failover. You
can automate this process by scripting the DNS updates in the failover and failback scripts. You have
two options for scripting the DNS updates.
Windows DNSCMD command—The Windows Support Tools contain a DNS Server
Troubleshooting Tool utility. This utility includes the DNSCMD command which can be scripted to
delete and add host and reverse lookup entries in DNS.
Storage Mirroring DFO command—Storage Mirroring also has a utility, called the DFO (DNS
F
ailover). The DFO command can be used to script the deletion and addition of the host and
reverse lookup entries in DNS. This utility can be found on the product CD or from the HP support
web site.
Windows DNSCMD command
DNS updates can be added to your failover and failback scripts by using the Windows DNSCMD
command as long as dynamic updates are enabled on the DNS zone and the account running the
Storage Mirroring service is a member of the DNSAdmins security group. (See your Microsoft
documentation to verify if dynamic updates are enabled.) Add the following commands to your
failover and failback scripts to delete the host and reverse lookup entries and add new entries
associating the source to the target.
dnscmd DNS_server’s_FQDN /RecordDelete DNS_zone source_server_name A
source_server_IP_address /f
dnscmd DNS_server’s_FQDN /RecordDelete www.xxx.in-addr.arpa zzz.yyy PTR
source_server’s_FQDN /f
dnscmd DNS_server’s_FQDN /RecordAdd DNS_zone source_server_name A
target_server_IP_address
dnscmd DNS_server’s_FQDN /RecordAdd aaa.bbb.in-addr.arpa ddd.ccc PTR
source_server’s_FQDN
The variables used in the commands are defined in the table below.
For example, suppose you had the following environment.
Variable Description
DNS_servers’s_FQDM The fully qualified domain name of the DNS server
DNS_zone The name of the DNS zone
source_server_name The name of the source server
source_server_IP_address The IP address on the source
www.xxx The first two octets of the source’s IP address. For example, if the
source’s IP address is 192.168.1.108, this variable would be
192.168.
zzz.yyy The last two octets, in reverse order, of the source’s IP address.
For example, if the source’s IP address is 192.168.1.108, this
variable would be 108.1.
source_server’s_FQDN The fully qualified domain name of the source server
target_server_IP_address The IP address on the source
aaa.bbb The first two octets of the target’s IP address. For example, if the
target’s IP address is 116.123.2.47, this variable would be
116.123.
ddd.ccc The last two octets, in reverse order, of the target’s IP address.
For example, if the target’s IP address is 116.123.2.47, this
variable would be 47.2.
- User’s Guide 1
- Table of Contents 3
- Introduction 8
- Storage Mirroring operations 10
- Replication 11
- Restoration 13
- Sample configurations 14
- One-to-one, active/active 15
- Many-to-one 16
- One-to-many 17
- Single server 19
- Virtual systems 20
- Resources 21
- Installation 22
- Management Console 32
- Creating groups 34
- Removing groups 34
- Moving servers 35
- Inserting servers 35
- Removing servers 36
- Hiding servers 36
- Unhiding servers 36
- Storage Mirroring workspaces 37
- Failover Control Center 38
- Replication Sets 39
- Replication capabilities 41
- Creating a replication set 43
- New Replication Set 44
- Modifying a replication set 45
- Deleting a replication set 45
- 2. Select the Size tab 46
- Establishing a 47
- Connection Using the 47
- Connection Wizard 47
- Connection Manager 49
- Connection Across a 53
- NAT or Firewall 53
- Establishing the connection 54
- Connection in a 55
- Cluster Environment 55
- Simulating a 61
- Connection 61
- Managing Connections 63
- Monitoring connections 64
- 0 and 1000 68
- Monitoring the message window 69
- Understanding queuing 71
- Configuring queuing 72
- Configuring compression 75
- Disconnecting a connection 76
- Blocking target paths 76
- Mirroring and 77
- 2. Select the Scripts tab 81
- Starting replication 83
- Verification 84
- Scheduled verification 85
- Verification log 86
- Data Transmission 89
- Setting bandwidth limitations 93
- Snapshots 95
- Automatic snapshots 98
- Scheduled snapshots 99
- Manual snapshots 99
- Archiving 100
- Archiving report 104
- Manual archiving 105
- Scheduled archiving 106
- Archive options 107
- Restoration for 109
- Disaster Recovery 109
- Failover for High 112
- Availability 112
- Configuration requirements 113
- Cluster configurations 114
- WINS replication 115
- Windows DNSCMD command 116
- Storage Mirroring DFO command 117
- Macintosh shares 120
- NFS shares 121
- Configuring failover 122
- Monitoring failover 127
- Updating shares manually 128
- Testing failover 128
- Failover manual intervention 129
- Restoration and 130
- Failback for High 130
- Failback then restoration 134
- Monitoring Tools 137
- Log files 138
- Viewing the log files 139
- Using LogViewer 140
- Log messages 141
- The target has been paused 143
- Windows Event Viewer 146
- 5 minutes 166
- DTStat statistics 168
- Windows Performance Monitor 172
- Configuring SNMP 175
- SNMP statistics 175
- SNMP traps 177
- Server Settings 180
- Licensing 182
- 50, this value can 188
- Database 191
- Script credentials 193
- E-mail notification 194
- Send to 195
- Error Codes 196
- Security 201
- 3. Click OK 203
- Storage Mirroring service 204
- Storage Mirroring groups 205
- Windows Active Directory 206
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