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Log Files
Various Storage Mirroring components (Storage Mirroring service, Management Console, Failover Control Center, Text
Client, and the Command Line Client) generate a log file to gather alerts, which are notification, warning, and error messages.
The log files are written to disk. They can be viewed, from the location where Storage Mirroring is installed, with a standard
text viewer. The log file output can be filtered using the Storage Mirroring LogViewer utility.
Each log file consists of a base name, a series number, and an extension.
Base Name—The base name is determined by the application or process that is running:
Series Number—The series number ranges from 1 to 999. For example, Storage Mirroring begins logging messages to
dtlog1. When this file reaches its maximum size, the next log file will be written to dtlog2. As long as log messages
continue to be written, files
dtlog3, dtlog4, dtlog5 will be opened and filled. When the maximum number of files is
reached, which by default is
5, the oldest file is deleted when the sixth file is created. For example, when dtlog6 is
created, dtlog1 is deleted and when dtlog7 is created, dtlog2 is deleted. When file dtlog999 is created and filled,
dtlog1 will be re-created and Storage Mirroring will continue writing log messages to that file. In the event that a file
cannot be removed, its number will be kept in the list, and on each successive file remove, the log writer will attempt to
remove the oldest file in the list.
Extension—The extension for each log file is .dtl.
1. To modify the maximum file size and the number of Storage Mirroring log files that are maintained, access the Server
Properties dialog box by right-clicking a machine name in the left pane of the Management Console and selecting
Properties.
2. Select the Logging tab.
3. At the top of the window, Folder indicates the directory where the log files are located. The default is the directory
where the Storage Mirroring program files are installed.
4. Modify any of the options under Messages and Alerts, if necessary.
Maximum Length—Specify the maximum length of the log file. The default size is 1048576 bytes and is limited by
the available hard drive space.
Maximum Files—Specify the maximum number of log files that are maintained. The default is 5 and the maximum
is
999.
5. Click OK to save the changes.
Component Log File Base Name
Storage Mirroring
dtlog
Management Console mc
Failover Control Center fcc
Te x t C l i e n t dttxt
Command Line Client dtcl
Component Sample Log File Names
Storage Mirroring
dtlog1.dtl, dtlog2.dtl
Management Console mc1.dtl, mc2.dtl
Failover Control Center fcc1.dtl, fcc2.dtl
Te x t C l i e n t dttxt1.dtl, dttxt2.dtl
Command Line Client dtcl1.dtl, dtcl2.dtl
NOTE:
If you change the Maximum Length or Maximum Files, you must restart the Storage Mirroring service
for the change to take effect.
- User’s Guide 1
- Table of Contents 3
- 1 X Introduction 8
- Storage Mirroring Overview 9
- Storage Mirroring operations 10
- Replication 11
- Restoration 13
- Server Recovery Option 14
- Full-Server Failover Option 15
- Sample configurations 17
- One-to-one, active/active 18
- Many-to-one 19
- One-to-many 20
- Description 21
- Applications 21
- Considerations 21
- Single server 22
- Virtual systems 23
- 3 X Installation 24
- 4 X Clients 34
- Creating groups 36
- Removing groups 36
- Moving servers 37
- Inserting servers 37
- Storage Mirroring workspaces 38
- Opening a workspace 39
- Failover Control Center 40
- Recovery Manager 41
- Full-Server Failover Manager 42
- 5 X Getting Started 44
- Protecting an entire server 46
- Recovering an entire server 48
- Configuring optional settings 51
- Finding a compatible target 55
- Starting failover 61
- Viewing the log 62
- Creating a replication set 68
- Establishing the connection 69
- Cluster configurations 73
- Configuring the hardware 80
- Gathering system information 81
- Managing Replication Sets 84
- Replication capabilities 85
- Modifying a replication set 87
- Deleting a replication set 88
- 14 X Managing Connections 90
- Monitoring connections 91
- Statistic Description 92
- Monitoring the message window 95
- Controlling mirroring 96
- Starting replication 99
- Configuring compression 100
- Verifying your data 102
- Scheduled verification 103
- Verification log 104
- Sample Verification Log 105
- Scheduled Snapshots 110
- Manual Snapshots 110
- Automatic Snapshots 110
- Understanding queuing 111
- Configuring queuing 112
- Blocking target paths 115
- Disconnecting a connection 115
- Controlling a target manually 116
- Setting bandwidth limitations 120
- 16 X Failover 123
- Configuration requirements 124
- WINS registration 125
- WINS replication 126
- Windows DNSCMD command 127
- Storage Mirroring DFO command 128
- Macintosh shares 131
- NFS shares 132
- Configuring failover 133
- Monitoring failover 137
- Updating shares manually 138
- Testing failover 138
- Failover manual intervention 139
- Restoration then failback 142
- Failback then restoration 145
- 19 X Monitoring Tools 147
- Log Files 148
- Viewing the log files 149
- Using LogViewer 150
- Log messages 151
- Windows Event Viewer 155
- DTStat statistics 172
- Windows Performance Monitor 176
- Configuring SNMP 178
- SNMP statistics 178
- SNMP traps 180
- 20 X Server Settings 183
- Licensing 185
- Move deleted files setting 193
- Database 194
- Script credentials 196
- E-mail notification 197
- 21 X Error Codes 199
- 22 X Security 204
- Storage Mirroring Groups 208
- Windows Active Directory 209
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