su - gpadmin
gpstart #正常啟動
gpstop #正常關閉
gpstop -m fast #快速關閉
gpstop –r #重啟
#正常登陸
psql gpdb
psql -d gpdb -h gphostm -p 5432 -u gpadmin
#使用utility方式
pgoptions="-c gp_session_role=utility" psql -h -d dbname hostname -p port
#退出在psql命令列執行\q
psql -c 'show all;' -d gpdb
gpconfig --show max_connections
createdb -h localhost -p 5432 dhdw
# 檔案系統名
gpfsdw
# 子節點，視segment數建立目錄
mkdir -p /gpfsdw/seg1
mkdir -p /gpfsdw/seg2
chown -r gpadmin:gpadmin /gpfsdw
# 主節點
mkdir -p /gpfsdw/master
chown -r gpadmin:gpadmin /gpfsdw
gpfilespace -o gpfilespace_config
gpfilespace -c gpfilespace_config
psql gpdb
create tablespace tbs_dw_data filespace gpfsdw;
set default_tablespace = tbs_dw_data;
gpdeletesystem -d /gpmaster/gpseg-1 -f
select * from gp_segment_configuration;
select * from pg_filespace_entry;
select * from gp_toolkit.gp_disk_free order by dfsegment;
select * from gp_toolkit.gp_size_of_database order by sodddatname;
select * from gp_toolkit.__gp_log_master_ext;
select * from gp_toolkit.__gp_log_segment_ext;
/d+
vacuum analyze tablename;
select gp_segment_id, count(*) from group by gp_segment_id;
select relname as name, sotdsize/1024/1024 as size_mb, sotdtoastsize as toast, sotdadditionalsize as other
from gp_toolkit.gp_size_of_table_disk as sotd, pg_class
where sotd.sotdoid = pg_class.oid order by relname;
select soisize/1024/1024 as size_mb, relname as indexname
from pg_class, gp_toolkit.gp_size_of_index
where pg_class.oid = gp_size_of_index.soioid
and pg_class.relkind='i';
select schemaname as schema, objname as table, usename as role, actionname as action, subtype as type, statime as time
from pg_stat_operations
where objname = '';
select locktype, database, c.relname, l.relation, l.transactionid, l.transaction, l.pid, l.mode, l.granted, a.current_query
from pg_locks l, pg_class c, pg_stat_activity a
where l.relation=c.oid
and l.pid=a.procpid
order by c.relname;
select * from pg_resqueue_status;
# 啟動服務
gpfdist -d /share/txt -p 8081 –l /share/txt/gpfdist.log &
# 建立外部表，分隔符為』/t』
ip text,
accesstime text,
reqmethod text,
url text,
statuscode int,
ref text,
name text,
vid text)
location ('gpfdist://gphostm:8081/***.txt')
format 'text' (delimiter e'/t'
fill missing fields) segment reject limit 1 percent;
# 建立普通表
# 索引
# create index idx_test on test using bitmap (ip);
# 查詢資料
select ip , count(*) from test group by ip order by count(*);
# 建立控制檔案
# 載入資料
gpload -f my_load.yml
copy country from '/data/gpdb/country_data'
with delimiter '|' log errors into err_country
segment reject limit 10 rows;
# 建立可寫外部表
create writable external table unload_expenses
( like expenses )
location ('gpfdist://etlhost-1:8081/expenses1.out',
'gpfdist://etlhost-2:8081/expenses2.out')
format 'text' (delimiter ',')
distributed by (exp_id);
# 寫許可權
grant insert on writable_ext_table to ;
# 寫資料
insert into writable_ext_table select * from regular_table;
copy (select * from country where country_name like 'a%') to '/home/gpadmin/a_list_countries.out';
psql gpdbname –f yoursqlfile.sql
或者psql登陸後執行
\i yoursqlfile.sql
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