clusterdb — PostgreSQL 데이터베이스를 대상으로 클러스터 작업을 한다
clusterdb [접속옵션...] [ --verbose | -v ]
[
--table | -t
테이블
]
... [디비이름]
clusterdb [접속옵션...] [ --verbose | -v ] --all | -a
clusterdb 명령은 지정한 PostgreSQL 데이터베이스 안에 있는 테이블들을 대상으로 클러스터 작업을 다시 하려고 할 때 사용된다. 이 명령은 먼저 해당 데이터베이스 안에 있는 이미 클러스터 된 테이블들을 찾고, 마지막 클러스터 작업에 사용했던 인덱스를 사용해서 다시 클러스터 작업을 한다. 클러스터 작업을 한 번도 하지 않은 테이블에 대해서는 관여하지 않는다.
clusterdb 명령은 CLUSTER SQL 명령어를 내부적으로 실행하는 응용 프로그램이다. 데이터베이스 서버에 접속해서 이 SQL 명령어를 이용해서 작업하나, 이 응용 프로그램을 이용하나 작업 결과는 같다.
그래서, 이 명령 사용 설명서를 우리말로 옮기는 작업은 더 이상 진행하지 않는다. - 옮긴이
clusterdb accepts the following command-line arguments:
-a--allCluster all databases.
[-d] dbname[--dbname=]dbname
Specifies the name of the database to be clustered,
when -a/--all is not used.
If this is not specified, the database name is read
from the environment variable PGDATABASE. If
that is not set, the user name specified for the connection is
used. The dbname can be a connection string. If so,
connection string parameters will override any conflicting command
line options.
-e--echoEcho the commands that clusterdb generates and sends to the server.
-q--quietDo not display progress messages.
-t table--table=table
Cluster table only.
Multiple tables can be clustered by writing multiple
-t switches.
-v--verbosePrint detailed information during processing.
-V--versionPrint the clusterdb version and exit.
-?--helpShow help about clusterdb command line arguments, and exit.
clusterdb also accepts the following command-line arguments for connection parameters:
-h host--host=hostSpecifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.
-p port--port=portSpecifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.
-U username--username=usernameUser name to connect as.
-w--no-password
Never issue a password prompt. If the server requires
password authentication and a password is not available by
other means such as a .pgpass file, the
connection attempt will fail. This option can be useful in
batch jobs and scripts where no user is present to enter a
password.
-W--passwordForce clusterdb to prompt for a password before connecting to a database.
This option is never essential, since
clusterdb will automatically prompt
for a password if the server demands password authentication.
However, clusterdb will waste a
connection attempt finding out that the server wants a password.
In some cases it is worth typing -W to avoid the extra
connection attempt.
--maintenance-db=dbname
Specifies the name of the database to connect to to discover which
databases should be clustered,
when -a/--all is used.
If not specified, the postgres database will be used,
or if that does not exist, template1 will be used.
This can be a connection
string. If so, connection string parameters will override any
conflicting command line options. Also, connection string parameters
other than the database name itself will be re-used when connecting
to other databases.
PGDATABASEPGHOSTPGPORTPGUSER접속 관련 기본 환경 변수들
PG_COLOR
Specifies whether to use color in diagnostic messages. Possible values
are always, auto and
never.
This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see 33.14절).
In case of difficulty, see CLUSTER and psql for discussions of potential problems and error messages. The database server must be running at the targeted host. Also, any default connection settings and environment variables used by the libpq front-end library will apply.
To cluster the database test:
$clusterdb test
To cluster a single table
foo in a database named
xyzzy:
$clusterdb --table=foo xyzzy