Kbase 13192: How does conv67 work?
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
10/05/1998 |
|
How does conv67 work?
Order of events for conv67 is:
1) Convert master block and mark as being converted
2) Convert multi-volume extent headers (if any)
3) Open database as V7 database in special convert mode
4) Convert Indices to V7 compressed format
5) Change schema from V6 to V7
6) Create sequence value block
7) Flush all changes to disk
8) Update masterblock and mark as real V7 database
Note: No free blocks are released to the operating system by the
conv67 utility. A dump and reload is still the only way to regain
unused blocks that have been allocated to the database. Since the
index compression may free up a considerable number of index blocks
which will be added to the free blocks for the database, it may be
desirable to dump the V6 database and reload into an empty V7 database
rather than using the conv67 utility. This will also allow the
user to deactivate indices and rebuild them for maximum optimization
using the -TM and -TB options. However, the conv67 utility is the
fastest way to convert the database if time is the highest priority.
Progress Software Technical Support Note # 13192