|
Pears SSDOT
Database Creation and Maintenance Options
Database creation
and maintenance procedures for a Pears database
encompass several different administrative activities from loading records
into a database to reorganizing database content. The procedures below
provide the steps for performing each of these kinds of administrative
activities that are available in SDDOT for
Pears.
Contents
Updating
a Pears Database
Validating a Pears Database
Reorganizing a Pears Database
Reindexing a Pears Database
Deleting Pears Database Files
Updating
a Pears Database
Broadly defined,
updating a database consists of performing one of three actions on it
to modify its content:
- adding new
records to it
- replacing existing
records in it
- deleting records
from it.
To load, replace,
or remove records from a Pears database,
you select the Update database option from the Database Creation
and Maintenance menu in SSDOT for Pears.
What actually prompts SSDOT for Pears to perform a specific update activity
on a record is not a utility but the record itself.
By default, SSDOT
for Pears assumes that all records in an input data file are to be added
to a Pears database. So if you do not indicate otherwise, all records
will be added when you perform an update.
In order to replace
or delete a record, you must first ensure that it has a unique identification
number associated with it and that it currently exists in the database.
A record that is not unique and does not currently exist in the database
cannot be updated or removed from the database.
Additionally, in
an input data file, a record to be replaced or deleted must contain an
appropriate high-level tag value. The location and value of this tag depends
on the format type of the record.
- SGML:
For SGML-formatted records, the first and last tags surrounding the
body of the record must be <reprec> and </reprec> or <delrec>
and </delrec> for a replace or delete, respectively.
- MARC:
For MARC-formatted records, the Record
Handler uses the status values from the MARC fixed fields.
- BER:
For BER records, the highest level tag value determines the action that
is to be taken on a record (0=add, 9=replace, 15=delete).
The procedure
below provides the steps for updating a Pears
database using SSDOT for Pears.
|
1. Start
SSDOT for Pears.
| Result: |
The
following Main Menu appears:
|
Main Menu
1. Database
Registration
2. BER Records
3. Database Creation and Maintenance
4. Database Backup
5. Advanced Options
6. Exit SSDOT
Working Database:
No database selected
Type "l"
To LIST available databases
Type "s" To SET a working database
Type "u" To UNSET the working database
Press [ENTER]
key to return to Main Menu
>
|
|
2. Type
3 and press Enter at the SSDOT command prompt.
| Result: |
The
following menu appears:
|
Database Creation
and Maintenance Menu
1. Update database
2. Validate database
3. Reorganize database
4. Reindex database
5. Delete database files
6. Log Files Menu
7. Convert Newton database to Pears database
8. Exit SSDOT
Working Database:
No database selected
Type "l"
To LIST available databases
Type "s" To SET a working database
Type "u" To UNSET the working database
Press [ENTER]
key to return to Main Menu
>
|
|
3. Type
1 and press Enter to begin updating the database.
| Result: |
The
following prompt appears:
|
Name of database
to UPDATE or press [ENTER] to return to menu:
|
|
4. Type the
name of the database to be updated and press Enter.
| Result: |
The
following prompt appears:
|
Input File name
or press [ENTER] key to return to menu:
|
|
5. Type the
full path to the input data file and press Enter.
| Example: |
Input
File name or press [ENTER] key to return to menu:
|
| |
<WebZ_root>/dbbuilder/dbs/marcus/marcus.dat |
| Result: |
The
following prompt appears:
|
Number of records
to UPDATE or [ENTER] for all:
|
|
6. Do you want
to update only a certain number of records?
- Yes:
Type the number of records that you wish to update and press the
Enter key. You must use a whole number such as 10, 100, or 345.
Starting with the first record, SSDOT sequentially updates only
as many records from the input data file as you have indicated.
| Example: |
Number
of records to UPDATE or [ENTER] for all: 250
If your
input file contains 600 records and you indicate that you
want to update only 250 of them, SSDOT sequentially processes
records 1 to 250 from the input file.
|
| Result: |
The following
prompt appears:
Number
of records to SKIP or [ENTER] for none:
|
|
|
7. Do you want
to skip certain records during the update?
- Yes:
Type the total number of records that you wish to skip and press
the Enter key. You must use a whole number such as 10, 100, or
345. Starting with the first record, SSDOT sequentially skips
the number of records in the input file that you have indicated.
| Example: |
Number
of records to SKIP or [ENTER] for none: 35
In this
example, SSDOT would skip the first 35 records it read from
the input file.
|
| Result: |
The following
prompt appears:
Type 2
for record locking or press the [ENTER] key for database locking:
|
|
|
8. What type
of lock do you wish to engage during the update process?
- Record
Locking? Type 2 and press the Enter key. A lock is placed
on each record as it is updated to prevent two users from modifying
it at the same time. Single record locking slows down the overall
update process, but it provides concurrent read and write access
to all other records in the database.
- Database
Locking? Press
the Enter key. A write protection is placed on the entire database
during the update process. This is the default type of lock and
it renders the entire database read-only during an update.
| Result: |
The following
update report appears after the update has completed:
###################################################
# Bartlett Record Update Report #
###################################################
Database
Name . . . . . . . . . . . . . . . . . . marcus
Database File . <WebZ_root>/dbbuilder/dbs/marcus/marcus.pdb
Update
Report:
------------------------------------------------------
Number of Records Added . . . . . . . . . . . . . 500
Number of Records Replaced . . . . . . . . . . . 0
Number of Records Deleted . . . . . . . . . . . . 0
Number of Records Processed . . . . . . . . . . . 500
Number of Bad Records . . . . . . . . . . . . . . 0
Database
Report
------------------------------------------------------
Number of Records . . . . . . . . . . . . . . . . 500
Number of Terms . . . . . . . . . . . . . . . . . 8,419
Number of Postings Lists . . . . . . . . . . . . 11
Number of Regions . . . . . . . . . . . . . . . . 65
Block size . . . . . . . . . . . . . . . . . . . 16,384 Bytes
Total Database Size . . . . . . . . . . . . . . . 1.0156 Megabytes
------------------------------------------------------
Report Generated by administrator
#################
End Bartlett Report ##############
Press [ENTER]
key to continue:
|
|
| 7. Press Enter
to return to the Database Creation and Maintenance Menu. |
Return
to Contents
Validating
a Pears Database
Running
validation on a Pears database statistically
verifies its content. Validation does not, however, indicate if the database
contains corrupted records or improperly built indexes. The procedure
below provides the steps for performing validation on a Pears
database using SSDOT for Pears.
|
1. Start
SSDOT for Pears.
| Result: |
The
following Main Menu appears:
|
Main Menu
1. Database
Registration
2. BER Records
3. Database Creation and Maintenance
4. Database Backup
5. Advanced Options
6. Exit SSDOT
Working Database:
No database selected
Type "l"
To LIST available databases
Type "s" To SET a working database
Type "u" To UNSET the working database
Press [ENTER]
key to return to Main Menu
>
|
|
2. Type
3 and press Enter at the SSDOT command prompt.
| Result: |
The
following menu appears:
|
Database Creation
and Maintenance Menu
1. Update database
2. Validate database
3. Reorganize database
4. Reindex database
5. Delete database files
6. Log Files Menu
7. Convert Newton database to Pears database
8. Exit SSDOT
Working Database:
No database selected
Type "l"
To LIST available databases
Type "s" To SET a working database
Type "u" To UNSET the working database
Press [ENTER]
key to return to Main Menu
>
|
|
3. Type
2 and press Enter to begin validating the database.
| Result: |
The
following prompt appears:
|
Name of database
to VALIDATE or press [ENTER] key to return to menu:
|
|
4. Type the
name of the database and press Enter to run the validation procedure
on it.
| Example: |
|
| Name
of database to VALIDATE or press [ENTER] key: marcus |
| Result: |
The
following type of information regarding your database appears:
|
####################################################
# Validation Report #
####################################################
** Validation
Ended Successfully **
--------------------------------------------------------
Database Name
. . . . . . . . . . . . . . . . . . . marcus
Database Size . . . . . . . . . . . . . . . . . . . 0.2031 Megabytes
Total Number of Records . . . . . . . . . . . . . . 19
Total Number of Terms . . . . . . . . . . . . . . . 814
Total Number of Postings Lists . . . . . . . . . . 0
Total Number of Regions . . . . . . . . . . . . . . 13
Total Number of Data Regions . . . . . . . . . . . 4
Total Number of Index Regions . . . . . . . . . . . 4
Total Number of Miscellaneous Regions . . . . . . . 5
--------------------------------------------------------
Total Validation Time 0.116 seconds
##############
End Validation Report ###############
Press [ENTER]
key to continue:
|
| 5. Press Enter
to return to the Database Creation and Maintenance Menu. |
Return
to Contents
Reorganizing
a Pears Database
Reorganization
of a Pears database is sometimes necessary
to defragment it. You may want to perform this procedure on a database
that is acting sluggish or on one that you have updated a lot recently.
The steps below help walk you through the reorganization procedure in
SSDOT for Pears.
|
1. Start
SSDOT for Pears.
| Result: |
The
following Main Menu appears:
|
Main Menu
1. Database
Registration
2. BER Records
3. Database Creation and Maintenance
4. Database Backup
5. Advanced Options
6. Exit SSDOT
Working Database:
No database selected
Type "l"
To LIST available databases
Type "s" To SET a working database
Type "u" To UNSET the working database
Press [ENTER]
key to return to Main Menu
>
|
|
2. Type
3 and press Enter at the SSDOT command prompt.
| Result: |
The
following menu appears:
|
Database Creation
and Maintenance Menu
1. Update database
2. Validate database
3. Reorganize database
4. Reindex database
5. Delete database files
6. Log Files Menu
7. Convert Newton database to Pears database
8. Exit SSDOT
Working Database:
No database selected
Type "l"
To LIST available databases
Type "s" To SET a working database
Type "u" To UNSET the working database
Press [ENTER]
key to return to Main Menu
>
|
|
3. Type
3 and press Enter to begin the reorganization procedure.
| Result: |
The
following prompt appears:
|
Name of database
to REORGANIZE or press [ENTER] key to return to menu:
|
|
4. Type the
name of the database that is to be reorganized and press Enter.
| Example: |
|
| Name
of database to REORGANIZE or press [ENTER] key: marcus |
| Result: |
The
following information regarding the reorganization of your
database appears:
|
###################################################
# Bartlett Record Update Report #
###################################################
Database Name
. . . . . . . . . . . . . . . . . . marcus
Database File . . . . . . . . . . . . . . . . . . <WebZ_root>/dbbuilder/dbs/marcus/marcus.pdb
Update Report:
------------------------------------------------------
Number of Records Added . . . . . . . . . . . . . 19
Number of Records Replaced . . . . . . . . . . . 0
Number of Records Deleted . . . . . . . . . . . . 0
Number of Records Processed . . . . . . . . . . . 19
Number of Bad Records . . . . . . . . . . . . . . 0
Database Report
------------------------------------------------------
Number of Records . . . . . . . . . . . . . . . . 19
Number of Terms . . . . . . . . . . . . . . . . . 814
Number of Postings Lists . . . . . . . . . . . . 0
Number of Regions . . . . . . . . . . . . . . . . 13
Block size . . . . . . . . . . . . . . . . . . . 16,384 Bytes
Total Database Size . . . . . . . . . . . . . . . 0.2031 Megabytes
------------------------------------------------------
Report Generated by administrator
#################
End Bartlett Report ##############
Press [ENTER]
key to continue:
|
| 5. Press Enter
to return to the Database Creation and Maintenance Menu. |
Return
to Contents
Reindexing
a Pears Database
Reindexing allows
you to add a new index, reload an existing index after having made changes
to it, or rebuild the stopwords list to update it. All this can be done
without you having to dump and reload the entire database. The procedure
below instructs you on how to reindex a Pears
database using SSDOT for Pears.
|
1. Start
SSDOT for Pears.
| Result: |
The
following Main Menu appears:
|
Main Menu
1. Database
Registration
2. BER Records
3. Database Creation and Maintenance
4. Database Backup
5. Advanced Options
6. Exit SSDOT
Working Database:
No database selected
Type "l"
To LIST available databases
Type "s" To SET a working database
Type "u" To UNSET the working database
Press [ENTER]
key to return to Main Menu
>
|
|
2. Type
3 and press Enter at the SSDOT command prompt.
| Result: |
The
following menu appears:
|
Database Creation
and Maintenance Menu
1. Update database
2. Validate database
3. Reorganize database
4. Reindex database
5. Delete database files
6. Log Files Menu
7. Convert Newton database to Pears database
8. Exit SSDOT
Working Database:
No database selected
Type "l"
To LIST available databases
Type "s" To SET a working database
Type "u" To UNSET the working database
Press [ENTER]
key to return to Main Menu
>
|
|
3. Type
4 and press Enter to begin the reindexing procedure.
| Result: |
The
following prompt appears:
|
**NOTE: You must
first edit the appropriate database description index before proceeding
**
Press [ENTER] key to continue:
|
|
4. Have you
edited the appropriate database description
configuration file?
|
|
5. Press Enter.
| Result: |
The
following prompt appears:
|
Name of database
to REINDEX or press [ENTER] key to return to menu:
|
|
6. Type the
name of the database and press Enter.
| Example: |
|
| Name
of database to REINDEX or press [ENTER] key to return to menu:
marcus |
| Result: |
The
following prompt appears:
|
Currently Selected
Indices: None selected
ID number of
the modified index.
Press "X" when done or [ENTER] key return to menu:
|
|
7. Type the
unique IDs associated with the new or modified index(es), then type
"X" and Enter.
| Example: |
Currently
Selected Indices: None selected
ID number
of the modified index.
Press "X" when done or [ENTER] key return to menu:
18
Currently
Selected Indices: 18
ID number
of the modified index.
Press "X" when done or [ENTER] key return to menu:
X
|
|
|
In this
example, "18" is the unique ID for the index to
be updated and "X" is typed to indicate that no
more indexes are to acted upon by SSDOT.
|
| Result: |
The
following validation information appears after SSDOT has completed
its reindexing procedure:
|
####################################################
# Validation Report #
####################################################
** Validation
Ended Successfully **
--------------------------------------------------------
Database Name
. . . . . . . . . . . . . . . . . . . marcus
Database Size . . . . . . . . . . . . . . . . . . . 0.3438 Megabytes
Total Number of Records . . . . . . . . . . . . . . 45
Total Number of Terms . . . . . . . . . . . . . . . 1,665
Total Number of Postings Lists . . . . . . . . . . 0
Total Number of Regions . . . . . . . . . . . . . . 22
Total Number of Data Regions . . . . . . . . . . . 11
Total Number of Index Regions . . . . . . . . . . . 6
Total Number of Miscellaneous Regions . . . . . . . 5
--------------------------------------------------------
Total Validation Time 0.706 seconds
##############
End Validation Report ###############
Press [ENTER]
key to continue:
| Note: |
If you
run the reindexing procedure without modifying indexes in the
database description configuration
file first, SSDOT automatically assumes that you want to
rebuild the stopwords list and the unique record ID index only.
In fact, every reindexing procedure performs these two activities
by default, regardless of the other indexes you choose to update
or add to the database. |
|
Return
to Contents
Deleting
Pears Database Files
Whether
you want to eliminate duplicates of the same database or you want to get
rid of a test version of a database, there are times when you need
to delete database files. The following procedure provides the steps for
deleting database files using SSDOT for Pears.
|
1. Start
SSDOT for Pears.
| Result: |
The
following Main Menu appears:
|
Main Menu
1. Database
Registration
2. BER Records
3. Database Creation and Maintenance
4. Database Backup
5. Advanced Options
6. Exit SSDOT
Working Database:
No database selected
Type "l"
To LIST available databases
Type "s" To SET a working database
Type "u" To UNSET the working database
Press [ENTER]
key to return to Main Menu
>
|
|
2. Type
3 and press Enter at the SSDOT command prompt.
| Result: |
The
following menu appears:
|
Database Creation
and Maintenance Menu
1. Update database
2. Validate database
3. Reorganize database
4. Reindex database
5. Delete database files
6. Log Files Menu
7. Convert Newton database to Pears database
8. Exit SSDOT
Working Database:
No database selected
Type "l"
To LIST available databases
Type "s" To SET a working database
Type "u" To UNSET the working database
Press [ENTER]
key to return to Main Menu
>
|
|
3. Type
5 and press Enter to begin the deletion procedure.
| Result: |
The
following prompt appears:
|
Name of database
to DELETE or press [ENTER] key to return to menu:
|
|
4. Type the
name of the database that you want to delete and press Enter.
| Example: |
|
|
Name of
database to DELETE or press [ENTER] to return to menu: marcus
|
| Result: |
The
following prompt appears:
|
Do you really
want to delete this database? (yes/no)
|
|
5. Do you really
want to delete the database?
- Yes:
Type "yes" and press Enter to unregister the database
and delete its .pdb, journal, backup, and log files.
| Result: |
The
following prompt appears:
|
Database successfully
deleted.
Press [ENTER]
key to continue:
- No:
Type "no" and press Enter to return to the Database
Creation and Maintenance Menu.
|
|
6. Press Enter
to return to the Database Creation and Maintenance Menu.
|
Return
to Contents
See Also
Pears
System Overview
Creating a New Pears Database
The
SiteSearch Database Operations Tool (SSDOT)
|