New functionality has been added to the ctutil command line utility to detect and fix files that suffer from file definition errors that can cause the dupscan workaround to not function properly. To trigger this new functionality, rename a copy of the ctutil executable to ctfixdupscan. Executing this renamed copy of ctutil will cause it to function as an ad-hoc utility to detect and fix file definition errors. The syntax of the command-line tool is as follows:
ctfixdupscan file [-fix]
where:
By default, the program checks if the specified file suffers from file definition errors. If the optional -fix parameter is specified after the file name, the file is fixed by copying it in place record-by-record.
Convert C-ISAM or Btrieve tables to FairCom RTG.
Usage of FairCom RTG ctmigra depends on your native data file types and your platform.
Usage
ctmigra btrv|extfh [OPTIONS] SOURCE DEST
where:
Options for FairCom RTG Files
The last three options enable the following configuration options on the destination file (corresponding to -e, -z, and -t respectively):
<encrypt type="CIPHER">
<datacompress type="TYPE"= level="LEV" strategy="STR">
<transaction logging="no|yes">
See usage examples in the next topics. Notice that the Micro Focus COBOL Migration Example can be useful for Btrieve users.
External Library Configuration for Native File Access
For certain data types, such as BTRV, original external libraries are required to access native data formats.
Note: Current usage options are always available when no command-line options are supplied.
Examples
If you are using FairCom RTG COBOL:
ctmigra.exe extfh -s MFFH.DLL -n FAIRCOMS@localhost -r C:\mydata\abc-btrv.dat abc-ctree.dat
If you are using FairCom RTG BTRV:
ctmigra.exe btrv -s wbtrv32.dll -n FAIRCOMS@localhost -r C:\mydata\abc-btrv.dat abc-ctree.dat
For more examples, see Micro Focus COBOL Migration Example.
ctmigra --quiet and --verbose options to select output information
These options for the ctmigra command-line utility suppress all output (--quiet or -q) or select the information to be sent to stdout (--verbose=LEVEL or -v). The --verbose parameter is a bitmask which can combine the following values:
1 - show message about final result
2 - show percentage progress
4 - show time spent in migration phases (read, write, finalize)
For example, to display everything, use --verbose=7, which is 1+2+4. If not specified, the --verbose level is 3 (1+2).
The --quiet option is identical to --verbose=0.
Alternative Usage
Most of the information you need for migration can be entered using the command-line parameters listed above. If you have additional considerations that dictate a more complex configuration, such as files that need to be treated specially, multiple clients, servers, etc., you can create a local configuration file (ctree.conf) for use during migration. (It can be edited as described in Editing a Configuration File.)
Note: The recommended best practice is to run ctmigra using the parameters listed above. If you must use the "alternative" approach described in this section, use the bulkaddition option in ctree.conf, which will greatly improve performance and it will optimize the index.
To use ctmigra with a local FairCom RTG configuration file, use the following command:
ctmigra btrv|extfh -c CONFIG_FILE SOURCE DEST
where:
Be sure to include the bulkaddition option in ctree.conf.
Potential Errors and Troubleshooting
BTRV Error: -7 |
Your native source library is likely not available. Check the path to your native data file handling library and be sure it is specified with the --source-lib= option. |
BTRV Error: 53 |
Attempted to open a non-BTRV file via a BTRV interface. This can possibly happen when you load a 32-bit BTRV DLL with a 64-bit version of the tool, or vice versa. |
In FairCom RTG V2, error messages displayed by the ctmigra utility have been enhanced as follows:
Behavior Change: This modification changes the behavior of the ctmigra tool.
FairCom RTG supports the FairCom Standalone operational model for specific use cases. This differs from the default client/server model by not using the FairCom RTG Database Server (faircom.exe, or ctreesql.exe in versions prior to V3). By not going through the FairCom RTG Database Server, the database I/O can at times be faster, typically when there is only a single instance performing database I/O. If you are using multiple versions of ctmigra to migrate several files at the same time, then we don’t recommend using the Standalone model.
ctmigra --local=LIBRARY Option
The new ctmigra option --local=LIBRARY allows setting the FairCom RTG Standalone library where library is a FairCom RTG Standalone library.
The --local switch instructs ctmigra to work in the Standalone operational model. When this switch is set, the following switches are all disabled:
-n (or -N) used for specifying the FairCom RTG Server name
-u (or -U) for specifying the user ID
-p (or -P) used for specifying the user ID password
ctmigra --local-sect Option
This modification introduces a new option in ctmigra to set the number of node sectors when using the option --local. The new option is --local-sect=SECT where SECT is the number of node sectors to use in the <localinstance sect> attribute of the ctmigra auto-generated FairCom RTG configuration file.
The option --local-sect is indicated when the file migrated by the local engine (ctmigra option --local) will be open by a c-tree Server configured with a PAGE_SIZE set to a higher value then the default 8192 (8KB).
If --local-sect is not specified, the default value of <localinstance sect> is used, which is 64 resulting in a node of 8192 bytes (64 * 128 bytes) matching the default PAGE_SIZE of the c-tree Server.
If, for example, the c-tree Server has a PAGE_SIZE of 32768, the ctmigra --local command should also include --local-sect=256 so the local engine will create files that can be open by c-tree Server.
When this option is set, the following are all disabled:
The option --local-sect=SECT where SECT is the number of node sectors can be used to specify the node size used to create the c-tree file.
The number of node sectors to use when performing data migration is important to ensure the data file created during the ctmigra process are of the same PAGE_SIZE being used by the FairCom RTG Server. The SECT setting provides a dynamic method for setting the matching FairCom RTG Server PAGE_SIZE setting. Note this equation: SECT*128 bytes = PAGE_SIZE. The default PAGE_SIZE for FairCom RTG V3 is now 32,768, therefore the default SECT value is 256. Here are SECT values for setting the more common PAGE_SIZE settings:
SECT |
PAGE_SIZE |
|
---|---|---|
64 |
8192 |
Default FairCom RTG < V3 |
128 |
16384 |
|
256 |
32768 |
Default FairCom RTG V3 |
512 |
65536 |
|
If --local-sect is not specified, the default value of <localinstance sect> is used, which is 256 for V3, and 64 for FairCom RTG versions prior to V3.
If, for example, the c-tree Server has a PAGE_SIZE of 16384, the ctmigra --local command should also include --local-sect=128 so the local engine will create files that can be opened by c-tree Server.
The attributes bufs and dbufs allow setting c-tree standalone index and data number of cache buffers respectively. The maximum acceptable value is 32,767.
The sect attributes set the table node size (which should match the server PAGE_SIZE). The maximum is 512.