postgresql 开启远程访问

1.如果服务器启用了防火墙，需要在防火墙上开启 5432 端口。

2.修改 PostgreSQL 配置文件 postgresql.conf、postgresql.conf，Linux 配置文件所在路径 /etc/postgresql/9.1/main

其中：配置文件 postgresql.conf 中删除 Connection Settings 段部分注释，修改为：

listen_addresses = '*' # what IP address(es) to listen on;
port = 5432 # (change requires restart)
max_connections = 100 # (change requires restart)

全文内容：

# -----------------------------

# PostgreSQL configuration file

# -----------------------------

#

# This file consists of lines of the form:

#

#   name = value

#

# (The "=" is optional.)  Whitespace may be used.  Comments are introduced with

# "#" anywhere on a line.  The complete list of parameter names and allowed

# values can be found in the PostgreSQL documentation.

#

# The commented-out settings shown in this file represent the default values.

# Re-commenting a setting is NOT sufficient to revert it to the default value;

# you need to reload the server.

#

# This file is read on server startup and when the server receives a SIGHUP

# signal.  If you edit the file on a running system, you have to SIGHUP the

# server for the changes to take effect, or use "pg_ctl reload".  Some

# parameters, which are marked below, require a server shutdown and restart to

# take effect.

#

# Any parameter can also be given as a command-line option to the server, e.g.,

# "postgres -c log_connections=on".  Some paramters can be changed at run time

# with the "SET" SQL command.

#

# Memory units:  kB = kilobytes MB = megabytes GB = gigabytes

# Time units:    ms = milliseconds s = seconds min = minutes h = hours d = days

#------------------------------------------------------------------------------

# FILE LOCATIONS

#------------------------------------------------------------------------------

# The default values of these variables are driven from the -D command-line

# option or PGDATA environment variable, represented here as ConfigDir.

#data_directory = 'ConfigDir'        # use data in another directory

                    # (change requires restart)

#hba_file = 'ConfigDir/pg_hba.conf'    # host-based authentication file

                    # (change requires restart)

#ident_file = 'ConfigDir/pg_ident.conf'    # ident configuration file

                    # (change requires restart)

# If external_pid_file is not explicitly set, no extra PID file is written.

#external_pid_file = '(none)'        # write an extra PID file

                    # (change requires restart)

#------------------------------------------------------------------------------

# CONNECTIONS AND AUTHENTICATION

#------------------------------------------------------------------------------

# - Connection Settings -

listen_addresses = '*'        # what IP address(es) to listen on;

                    # comma-separated list of addresses;

                    # defaults to 'localhost', '*' = all

                    # (change requires restart)

port = 5432                # (change requires restart)

max_connections = 100            # (change requires restart)

# Note:  Increasing max_connections costs ~400 bytes of shared memory per

# connection slot, plus lock space (see max_locks_per_transaction).  You might

# also need to raise shared_buffers to support more connections.

#superuser_reserved_connections = 3    # (change requires restart)

#unix_socket_directory = ''        # (change requires restart)

#unix_socket_group = ''            # (change requires restart)

#unix_socket_permissions = 0777        # begin with 0 to use octal notation

                    # (change requires restart)

#bonjour_name = ''            # defaults to the computer name

                    # (change requires restart)

# - Security and Authentication -

#authentication_timeout = 1min        # 1s-600s

#ssl = off                # (change requires restart)

#ssl_ciphers = 'ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH'    # allowed SSL ciphers

                    # (change requires restart)

#password_encryption = on

#db_user_namespace = off

# Kerberos and GSSAPI

#krb_server_keyfile = ''        # (change requires restart)

#krb_srvname = 'postgres'        # (change requires restart, Kerberos only)

#krb_server_hostname = ''        # empty string matches any keytab entry

                    # (change requires restart, Kerberos only)

#krb_caseins_users = off        # (change requires restart)

#krb_realm = ''                   # (change requires restart)

# - TCP Keepalives -

# see "man 7 tcp" for details

#tcp_keepalives_idle = 0        # TCP_KEEPIDLE, in seconds;

                    # 0 selects the system default

#tcp_keepalives_interval = 0        # TCP_KEEPINTVL, in seconds;

                    # 0 selects the system default

#tcp_keepalives_count = 0        # TCP_KEEPCNT;

                    # 0 selects the system default

#------------------------------------------------------------------------------

# RESOURCE USAGE (except WAL)

#------------------------------------------------------------------------------

# - Memory -

shared_buffers = 32MB            # min 128kB or max_connections*16kB

                    # (change requires restart)

#temp_buffers = 8MB            # min 800kB

#max_prepared_transactions = 5        # can be 0 or more

                    # (change requires restart)

# Note:  Increasing max_prepared_transactions costs ~600 bytes of shared memory

# per transaction slot, plus lock space (see max_locks_per_transaction).

#work_mem = 1MB                # min 64kB

#maintenance_work_mem = 16MB        # min 1MB

#max_stack_depth = 2MB            # min 100kB

# - Free Space Map -

max_fsm_pages = 204800            # min max_fsm_relations*16, 6 bytes each

                    # (change requires restart)

#max_fsm_relations = 1000        # min 100, ~70 bytes each

                    # (change requires restart)

# - Kernel Resource Usage -

#max_files_per_process = 1000        # min 25

                    # (change requires restart)

shared_preload_libraries = '$libdir/plugins/plugin_debugger.dll'        # (change requires restart)

# - Cost-Based Vacuum Delay -

#vacuum_cost_delay = 0            # 0-1000 milliseconds

#vacuum_cost_page_hit = 1        # 0-10000 credits

#vacuum_cost_page_miss = 10        # 0-10000 credits

#vacuum_cost_page_dirty = 20        # 0-10000 credits

#vacuum_cost_limit = 200        # 1-10000 credits

# - Background Writer -

#bgwriter_delay = 200ms            # 10-10000ms between rounds

#bgwriter_lru_maxpages = 100        # 0-1000 max buffers written/round

#bgwriter_lru_multiplier = 2.0        # 0-10.0 multipler on buffers scanned/round

#------------------------------------------------------------------------------

# WRITE AHEAD LOG

#------------------------------------------------------------------------------

# - Settings -

#fsync = on                # turns forced synchronization on or off

#synchronous_commit = on        # immediate fsync at commit

#wal_sync_method = fsync        # the default is the first option

                    # supported by the operating system:

                    #   open_datasync

                    #   fdatasync

                    #   fsync

                    #   fsync_writethrough

                    #   open_sync

#full_page_writes = on            # recover from partial page writes

#wal_buffers = 64kB            # min 32kB

                    # (change requires restart)

#wal_writer_delay = 200ms        # 1-10000 milliseconds

#commit_delay = 0            # range 0-100000, in microseconds

#commit_siblings = 5            # range 1-1000

# - Checkpoints -

#checkpoint_segments = 3        # in logfile segments, min 1, 16MB each

#checkpoint_timeout = 5min        # range 30s-1h

#checkpoint_completion_target = 0.5    # checkpoint target duration, 0.0 - 1.0

#checkpoint_warning = 30s        # 0 is off

# - Archiving -

#archive_mode = off        # allows archiving to be done

                # (change requires restart)

#archive_command = ''        # command to use to archive a logfile segment

#archive_timeout = 0        # force a logfile segment switch after this

                # time; 0 is off

#------------------------------------------------------------------------------

# QUERY TUNING

#------------------------------------------------------------------------------

# - Planner Method Configuration -

#enable_bitmapscan = on

#enable_hashagg = on

#enable_hashjoin = on

#enable_indexscan = on

#enable_mergejoin = on

#enable_nestloop = on

#enable_seqscan = on

#enable_sort = on

#enable_tidscan = on

# - Planner Cost Constants -

#seq_page_cost = 1.0            # measured on an arbitrary scale

#random_page_cost = 4.0            # same scale as above

#cpu_tuple_cost = 0.01            # same scale as above

#cpu_index_tuple_cost = 0.005        # same scale as above

#cpu_operator_cost = 0.0025        # same scale as above

#effective_cache_size = 128MB

# - Genetic Query Optimizer -

#geqo = on

#geqo_threshold = 12

#geqo_effort = 5            # range 1-10

#geqo_pool_size = 0            # selects default based on effort

#geqo_generations = 0            # selects default based on effort

#geqo_selection_bias = 2.0        # range 1.5-2.0

# - Other Planner Options -

#default_statistics_target = 10        # range 1-1000

#constraint_exclusion = off

#from_collapse_limit = 8

#join_collapse_limit = 8        # 1 disables collapsing of explicit

                    # JOIN clauses

#------------------------------------------------------------------------------

# ERROR REPORTING AND LOGGING

#------------------------------------------------------------------------------

# - Where to Log -

log_destination = 'stderr'        # Valid values are combinations of

                    # stderr, csvlog, syslog and eventlog,

                    # depending on platform.  csvlog

                    # requires logging_collector to be on.

# This is used when logging to stderr:

logging_collector = on        # Enable capturing of stderr and csvlog

                    # into log files. Required to be on for

                    # csvlogs.

                    # (change requires restart)

# These are only used if logging_collector is on:

#log_directory = 'pg_log'        # directory where log files are written,

                    # can be absolute or relative to PGDATA

#log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'    # log file name pattern,

                    # can include strftime() escapes

#log_truncate_on_rotation = off        # If on, an existing log file of the

                    # same name as the new log file will be

                    # truncated rather than appended to.

                    # But such truncation only occurs on

                    # time-driven rotation, not on restarts

                    # or size-driven rotation.  Default is

                    # off, meaning append to existing files

                    # in all cases.

#log_rotation_age = 1d            # Automatic rotation of logfiles will

                    # happen after that time.  0 to disable.

#log_rotation_size = 10MB        # Automatic rotation of logfiles will

                    # happen after that much log output.

                    # 0 to disable.

# These are relevant when logging to syslog:

#syslog_facility = 'LOCAL0'

#syslog_ident = 'postgres'

# - When to Log -

#client_min_messages = notice        # values in order of decreasing detail:

                    #   debug5

                    #   debug4

                    #   debug3

                    #   debug2

                    #   debug1

                    #   log

                    #   notice

                    #   warning

                    #   error

#log_min_messages = notice        # values in order of decreasing detail:

                    #   debug5

                    #   debug4

                    #   debug3

                    #   debug2

                    #   debug1

                    #   info

                    #   notice

                    #   warning

                    #   error

                    #   log

                    #   fatal

                    #   panic

#log_error_verbosity = default        # terse, default, or verbose messages

#log_min_error_statement = error    # values in order of decreasing detail:

                     #   debug5

                    #   debug4

                    #   debug3

                    #   debug2

                    #   debug1

                     #   info

                    #   notice

                    #   warning

                    #   error

                    #   log

                    #   fatal

                    #   panic (effectively off)

#log_min_duration_statement = -1    # -1 is disabled, 0 logs all statements

                    # and their durations, > 0 logs only

                    # statements running at least this time.

#silent_mode = off            # DO NOT USE without syslog or

                    # logging_collector

                    # (change requires restart)

# - What to Log -

#debug_print_parse = off

#debug_print_rewritten = off

#debug_print_plan = off

#debug_pretty_print = off

#log_checkpoints = off

#log_connections = off

#log_disconnections = off

#log_duration = off

#log_hostname = off

log_line_prefix = '%t '            # special values:

                    #   %u = user name

                    #   %d = database name

                    #   %r = remote host and port

                    #   %h = remote host

                    #   %p = process ID

                    #   %t = timestamp without milliseconds

                    #   %m = timestamp with milliseconds

                    #   %i = command tag

                    #   %c = session ID

                    #   %l = session line number

                    #   %s = session start timestamp

                    #   %v = virtual transaction ID

                    #   %x = transaction ID (0 if none)

                    #   %q = stop here in non-session

                    #        processes

                    #   %% = '%'

                    # e.g. '<%u%%%d> '

#log_lock_waits = off            # log lock waits >= deadlock_timeout

#log_statement = 'none'            # none, ddl, mod, all

#log_temp_files = -1            # log temporary files equal or larger

                    # than specified size;

                    # -1 disables, 0 logs all temp files

#log_timezone = unknown            # actually, defaults to TZ environment

                    # setting

#------------------------------------------------------------------------------

# RUNTIME STATISTICS

#------------------------------------------------------------------------------

# - Query/Index Statistics Collector -

#track_activities = on

#track_counts = on

#update_process_title = on

# - Statistics Monitoring -

#log_parser_stats = off

#log_planner_stats = off

#log_executor_stats = off

#log_statement_stats = off

#------------------------------------------------------------------------------

# AUTOVACUUM PARAMETERS

#------------------------------------------------------------------------------

#autovacuum = on            # Enable autovacuum subprocess?  'on'

                    # requires track_counts to also be on.

#log_autovacuum_min_duration = -1    # -1 disables, 0 logs all actions and

                    # their durations, > 0 logs only

                    # actions running at least that time.

#autovacuum_max_workers = 3        # max number of autovacuum subprocesses

#autovacuum_naptime = 1min        # time between autovacuum runs

#autovacuum_vacuum_threshold = 50    # min number of row updates before

                    # vacuum

#autovacuum_analyze_threshold = 50    # min number of row updates before

                    # analyze

#autovacuum_vacuum_scale_factor = 0.2    # fraction of table size before vacuum

#autovacuum_analyze_scale_factor = 0.1    # fraction of table size before analyze

#autovacuum_freeze_max_age = 200000000    # maximum XID age before forced vacuum

                    # (change requires restart)

#autovacuum_vacuum_cost_delay = 20    # default vacuum cost delay for

                    # autovacuum, -1 means use

                    # vacuum_cost_delay

#autovacuum_vacuum_cost_limit = -1    # default vacuum cost limit for

                    # autovacuum, -1 means use

                    # vacuum_cost_limit

#------------------------------------------------------------------------------

# CLIENT CONNECTION DEFAULTS

#------------------------------------------------------------------------------

# - Statement Behavior -

#search_path = '"$user",public'        # schema names

#default_tablespace = ''        # a tablespace name, '' uses the default

#temp_tablespaces = ''            # a list of tablespace names, '' uses

                    # only default tablespace

#check_function_bodies = on

#default_transaction_isolation = 'read committed'

#default_transaction_read_only = off

#session_replication_role = 'origin'

#statement_timeout = 0            # 0 is disabled

#vacuum_freeze_min_age = 100000000

#xmlbinary = 'base64'

#xmloption = 'content'

# - Locale and Formatting -

datestyle = 'iso, mdy'

#timezone = unknown            # actually, defaults to TZ environment

                    # setting

#timezone_abbreviations = 'Default'     # Select the set of available time zone

                    # abbreviations.  Currently, there are

                    #   Default

                    #   Australia

                    #   India

                    # You can create your own file in

                    # share/timezonesets/.

#extra_float_digits = 0            # min -15, max 2

#client_encoding = sql_ascii        # actually, defaults to database

                    # encoding

# These settings are initialized by initdb, but they can be changed.

lc_messages = 'C'            # locale for system error message

                    # strings

lc_monetary = 'C'            # locale for monetary formatting

lc_numeric = 'C'            # locale for number formatting

lc_time = 'C'                # locale for time formatting

# default configuration for text search

default_text_search_config = 'pg_catalog.english'

# - Other Defaults -

#explain_pretty_print = on

#dynamic_library_path = '$libdir'

#local_preload_libraries = ''

#------------------------------------------------------------------------------

# LOCK MANAGEMENT

#------------------------------------------------------------------------------

#deadlock_timeout = 1s

#max_locks_per_transaction = 64        # min 10

                    # (change requires restart)

# Note:  Each lock table slot uses ~270 bytes of shared memory, and there are

# max_locks_per_transaction * (max_connections + max_prepared_transactions)

# lock table slots.

#------------------------------------------------------------------------------

# VERSION/PLATFORM COMPATIBILITY

#------------------------------------------------------------------------------

# - Previous PostgreSQL Versions -

#add_missing_from = off

#array_nulls = on

#backslash_quote = safe_encoding    # on, off, or safe_encoding

#default_with_oids = off

#escape_string_warning = on

#regex_flavor = advanced        # advanced, extended, or basic

#sql_inheritance = on

#standard_conforming_strings = off

#synchronize_seqscans = on

# - Other Platforms and Clients -

#transform_null_equals = off

#------------------------------------------------------------------------------

# CUSTOMIZED OPTIONS

#------------------------------------------------------------------------------

#custom_variable_classes = ''        # list of custom variable class names

其中：配置文件 pg_hba.conf 中 IPv4 local connections 段添加行 host all all 192.168.0.0/16 md5 ，修改为：

# IPv4 local connections:
host all all 127.0.0.1/32 md5
host all all 192.168.0.0/16 md5

全文内容：

# PostgreSQL Client Authentication Configuration File

# ===================================================

#

# Refer to the "Client Authentication" section in the

# PostgreSQL documentation for a complete description

# of this file.  A short synopsis follows.

#

# This file controls: which hosts are allowed to connect, how clients

# are authenticated, which PostgreSQL user names they can use, which

# databases they can access.  Records take one of these forms:

#

# local      DATABASE  USER  METHOD  [OPTION]

# host       DATABASE  USER  CIDR-ADDRESS  METHOD  [OPTION]

# hostssl    DATABASE  USER  CIDR-ADDRESS  METHOD  [OPTION]

# hostnossl  DATABASE  USER  CIDR-ADDRESS  METHOD  [OPTION]

#

# (The uppercase items must be replaced by actual values.)

#

# The first field is the connection type: "local" is a Unix-domain socket,

# "host" is either a plain or SSL-encrypted TCP/IP socket, "hostssl" is an

# SSL-encrypted TCP/IP socket, and "hostnossl" is a plain TCP/IP socket.

#

# DATABASE can be "all", "sameuser", "samerole", a database name, or

# a comma-separated list thereof.

#

# USER can be "all", a user name, a group name prefixed with "+", or

# a comma-separated list thereof.  In both the DATABASE and USER fields

# you can also write a file name prefixed with "@" to include names from

# a separate file.

#

# CIDR-ADDRESS specifies the set of hosts the record matches.

# It is made up of an IP address and a CIDR mask that is an integer

# (between 0 and 32 (IPv4) or 128 (IPv6) inclusive) that specifies

# the number of significant bits in the mask.  Alternatively, you can write

# an IP address and netmask in separate columns to specify the set of hosts.

#

# METHOD can be "trust", "reject", "md5", "crypt", "password", "gss", "sspi",

# "krb5", "ident", "pam" or "ldap".  Note that "password" sends passwords

# in clear text; "md5" is preferred since it sends encrypted passwords.

#

# OPTION is the ident map or the name of the PAM service, depending on METHOD.

#

# Database and user names containing spaces, commas, quotes and other special

# characters must be quoted. Quoting one of the keywords "all", "sameuser" or

# "samerole" makes the name lose its special character, and just match a

# database or username with that name.

#

# This file is read on server startup and when the postmaster receives

# a SIGHUP signal.  If you edit the file on a running system, you have

# to SIGHUP the postmaster for the changes to take effect.  You can use

# "pg_ctl reload" to do that.

# Put your actual configuration here

# ----------------------------------

#

# If you want to allow non-local connections, you need to add more

# "host" records. In that case you will also need to make PostgreSQL listen

# on a non-local interface via the listen_addresses configuration parameter,

# or via the -i or -h command line switches.

#

# TYPE  DATABASE    USER        CIDR-ADDRESS          METHOD

# IPv4 local connections:

host    all         all         127.0.0.1/32          md5

host    all        all     192.168.0.0/16        md5

# IPv6 local connections:

host    all         all         ::1/128               md5

3.重启 PostgreSQL ，输入命令：service postgresql restart

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转自:http://www.cnblogs.com/assassinx/archive/2013/01/09/dicomViewer.html Dicom全称是医学数字图像与通讯,这里讲的暂不涉及通讯 ...
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// // View.h // UI5_HomeWork // // Created by zhangxueming on 15/7/2. // Copyright (c) 2015年 zhangxu ...

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