Skip to content
GitLab
Projects
Groups
Snippets
/
Help
Help
Support
Community forum
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
Menu
Open sidebar
ISC Open Source Projects
BIND
Commits
fb2d509d
Commit
fb2d509d
authored
Feb 22, 1999
by
Bob Halley
Browse files
fill paragraph
parent
015156af
Changes
1
Hide whitespace changes
Inline
Side-by-side
doc/design/database
View file @
fb2d509d
...
...
@@ -112,16 +112,16 @@ Database Versioning
Versioning is not available in cache databases.
A zone database has a "current version" which is the version most
recently
committed. A database has a set of versions open for reading
(the
"open versions"). This set is always non-empty, since the
current
version is always open. The openversion method opens a
read-only
handle to the current version. All retrievals using the
handle will
see the database as it was at the time the version was
opened,
regardless of subsequent changes to the database. It is not
possible
to open a specific version; only the current version may be
opened.
This helps limit the number of prior versions which must be
kept in
the database.
A zone database has a "current version" which is the version most
recently
committed. A database has a set of versions open for reading
(the
"open versions"). This set is always non-empty, since the
current
version is always open. The openversion method opens a
read-only
handle to the current version. All retrievals using the
handle will
see the database as it was at the time the version was
opened,
regardless of subsequent changes to the database. It is not
possible
to open a specific version; only the current version may be
opened.
This helps limit the number of prior versions which must be
kept in
the database.
Each zone update transaction is assigned a new version. Only one such
"future version" may be open at any time. It is the caller's
...
...
Write
Preview
Supports
Markdown
0%
Try again
or
attach a new file
.
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment