{"id":5169,"date":"2015-06-26T12:53:56","date_gmt":"2015-06-26T10:53:56","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/"},"modified":"2015-06-26T12:53:56","modified_gmt":"2015-06-26T10:53:56","slug":"quickly-create-a-hundred-databases-and-users","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/","title":{"rendered":"Quickly create a hundred databases and users"},"content":{"rendered":"

Do you need a hundred databases and users for training etc. in PostgreSQL?
\n\"Read
\nJust a few lines of code:<\/p>\n

[postgres8@oel7 data]$ cat create_databases.sh\n #!\/bin\/bash\n NUMOFDBS=100\n for i in `seq ${NUMOFDBS}`; do\n psql -q -c \"create user u${i} UNENCRYPTED password 'u${i}' NOCREATEDB NOCREATEROLE NOCREATEUSER\" postgres\n createdb -O u${i} db${i}<\/pre>\n
done<\/p>\n
Execute it and you are ready:<\/p>\n
[postgres8@oel7 data]$ time .\/create_databases.sh\nreal 1m37.825s\n user 0m0.143s\n sys 0m0.109s<\/pre>\n
Have a look at the databases and its owners:<\/p>\n
postgres=# \\l+\n\nName | Owner | Encoding | Collate | Ctype | Access privileges | Size | Tablespace | Description\n -----------+-----------+----------+-------------+-------------+-------------------------+---------+------------+--------------------------------------------\n db1 | u1 | UTF8 | en_US.UTF-8 | en_US.UTF-8 | | 6705 kB | pg_default |\n db10 | u10 | UTF8 | en_US.UTF-8 | en_US.UTF-8 | | 6705 kB | pg_default |\n db100 | u100 | UTF8 | en_US.UTF-8 | en_US.UTF-8 | | 6705 kB | pg_default |\n db11 | u11 | UTF8 | en_US.UTF-8 | en_US.UTF-8 | | 6705 kB | pg_default |\n db12 | u12 | UTF8 | en_US.UTF-8 | en_US.UTF-8 | | 6705 kB | pg_default |\n ...<\/pre>\n
Really, really easy. For dropping the databases:<\/p>\n
[postgres8@oel7 data]$ cat drop_databases.sh\n #!\/bin\/bash\nNUMOFDBS=100\nfor i in `seq ${NUMOFDBS}`; do\n dropdb db${i}\n dropuser u${i}\ndone\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
Do you need a hundred databases and users for training etc. in PostgreSQL? Just a few lines of code: [postgres8@oel7 data]$ cat create_databases.sh #!\/bin\/bash NUMOFDBS=100 for i in `seq ${NUMOFDBS}`; do psql -q -c “create user u${i} UNENCRYPTED password ‘u${i}’ NOCREATEDB NOCREATEROLE NOCREATEUSER” postgres createdb -O u${i} db${i} done Execute it and you are ready: […]<\/p>\n","protected":false},"author":29,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[229],"tags":[77],"type_dbi":[],"class_list":["post-5169","post","type-post","status-publish","format-standard","hentry","category-database-administration-monitoring","tag-postgresql"],"acf":[],"yoast_head":"\nQuickly create a hundred databases and users - dbi Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quickly create a hundred databases and users\" \/>\n<meta property=\"og:description\" content=\"Do you need a hundred databases and users for training etc. in PostgreSQL? Just a few lines of code: [postgres8@oel7 data]$ cat create_databases.sh #!\/bin\/bash NUMOFDBS=100 for i in `seq ${NUMOFDBS}`; do psql -q -c "create user u${i} UNENCRYPTED password 'u${i}' NOCREATEDB NOCREATEROLE NOCREATEUSER" postgres createdb -O u${i} db${i} done Execute it and you are ready: […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2015-06-26T10:53:56+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/wwwold.dbi-services.com\/plugins\/editors\/jce\/tiny_mce\/plugins\/article\/img\/trans.gif\" \/>\n<meta name=\"author\" content=\"Daniel Westermann\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@westermanndanie\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Daniel Westermann\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/\"},\"author\":{\"name\":\"Daniel Westermann\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d08e9bd996a89bd75c0286cbabf3c66\"},\"headline\":\"Quickly create a hundred databases and users\",\"datePublished\":\"2015-06-26T10:53:56+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/\"},\"wordCount\":49,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/#primaryimage\"},\"thumbnailUrl\":\"http:\/\/wwwold.dbi-services.com\/plugins\/editors\/jce\/tiny_mce\/plugins\/article\/img\/trans.gif\",\"keywords\":[\"PostgreSQL\"],\"articleSection\":[\"Database Administration & Monitoring\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/\",\"url\":\"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/\",\"name\":\"Quickly create a hundred databases and users - 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He has more than 15 years of experience in management, engineering and optimization of databases and infrastructures, especially on Oracle and PostgreSQL. Since the beginning of his career, he has specialized in Oracle Technologies and is Oracle Certified Professional 12c and Oracle Certified Expert RAC\/GridInfra. Over time, Daniel has become increasingly interested in open source technologies, becoming \u201cTechnology Leader Open Infrastructure\u201d and PostgreSQL expert. \u00a0Based on community or EnterpriseDB tools, he develops and installs complex high available solutions with PostgreSQL. He is also a certified PostgreSQL Plus 9.0 Professional and a Postgres Advanced Server 9.4 Professional. He is a regular speaker at PostgreSQL conferences in Switzerland and Europe. Today Daniel is also supporting our customers on AWS services such as AWS RDS, database migrations into the cloud, EC2 and automated infrastructure management with AWS SSM (System Manager). He is a certified AWS Solutions Architect Professional. Prior to dbi services, Daniel was Management System Engineer at LC SYSTEMS-Engineering AG in Basel. Before that, he worked as Oracle Developper &\u00a0Project Manager at Delta Energy Solutions AG in Basel (today Powel AG). Daniel holds a diploma in Business Informatics (DHBW, Germany). His branch-related experience mainly covers the pharma industry, the financial sector, energy, lottery and telecommunications.\",\"sameAs\":[\"https:\/\/x.com\/westermanndanie\"],\"url\":\"https:\/\/www.dbi-services.com\/blog\/author\/daniel-westermann\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Quickly create a hundred databases and users - dbi Blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.dbi-services.com\/blog\/quickly-create-a-hundred-databases-and-users\/","og_locale":"en_US","og_type":"article","og_title":"Quickly create a hundred databases and users","og_description":"Do you need a hundred databases and users for training etc. in PostgreSQL? 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He has more than 15 years of experience in management, engineering and optimization of databases and infrastructures, especially on Oracle and PostgreSQL. Since the beginning of his career, he has specialized in Oracle Technologies and is Oracle Certified Professional 12c and Oracle Certified Expert RAC\/GridInfra. Over time, Daniel has become increasingly interested in open source technologies, becoming \u201cTechnology Leader Open Infrastructure\u201d and PostgreSQL expert. \u00a0Based on community or EnterpriseDB tools, he develops and installs complex high available solutions with PostgreSQL. He is also a certified PostgreSQL Plus 9.0 Professional and a Postgres Advanced Server 9.4 Professional. He is a regular speaker at PostgreSQL conferences in Switzerland and Europe. Today Daniel is also supporting our customers on AWS services such as AWS RDS, database migrations into the cloud, EC2 and automated infrastructure management with AWS SSM (System Manager). He is a certified AWS Solutions Architect Professional. Prior to dbi services, Daniel was Management System Engineer at LC SYSTEMS-Engineering AG in Basel. Before that, he worked as Oracle Developper &\u00a0Project Manager at Delta Energy Solutions AG in Basel (today Powel AG). Daniel holds a diploma in Business Informatics (DHBW, Germany). His branch-related experience mainly covers the pharma industry, the financial sector, energy, lottery and telecommunications.","sameAs":["https:\/\/x.com\/westermanndanie"],"url":"https:\/\/www.dbi-services.com\/blog\/author\/daniel-westermann\/"}]}},"_links":{"self":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts\/5169","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/users\/29"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/comments?post=5169"}],"version-history":[{"count":0,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/posts\/5169\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/media?parent=5169"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/categories?post=5169"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/tags?post=5169"},{"taxonomy":"type","embeddable":true,"href":"https:\/\/www.dbi-services.com\/blog\/wp-json\/wp\/v2\/type_dbi?post=5169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}