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Crush Algorithm1, the purpose of crushOptimize allocation data, efficiently reorganize data, flexibly constrain object copy placement, maximize data security when hardware fails2. ProcessIn the Ceph architecture, the Ceph client is directly read and

This example describes the database operations classes available in MYSQL,MSSQL,PG three databases, and you can easily change the type of your database as long as you make any changes. Share it for your reference. The specific analysis is as follows:

-Function Manifest Index:-Open: Opening database connection line:71-Close: Closes the database connection line:107-SELECTDB: Select Database line:129-Query: Create queries line:151-Dataseek: Move record pointer line:175-FieldName: Get field name

One, database upgrade 9.4 to 9.51.pg_dump Import and export (used when data volume is small)Postgres User Login$ pg_dumpall > Db_export.out$ env|grep LANGLang=en_us. UTF-8If the database character set is en_US. UTF-8, the system character set is

/** * * Generic PHP paging class. (Imitation Google style) * * Simply provide two parameters for the total number of records and the number of displays per page. (Detailed usage instructions are attached.) * * No URL is specified and

PHP Generic paging class. This code is used for paging. a slight modification can be used for various programs. For usage instructions, see my article. Page. php The code is as follows: /** ** Generic php paging class. (Like Google style) ** You

Php Generic paging code, similar to goolge paging style /** ** Generic php paging class. (Like Google style) ** You only need to provide two parameters: the total number of records and the number of

PHP Generic paging class. This code is used for paging. a slight modification can be used for various programs. For usage instructions, see my article. Page. php The code is as follows: /**** Generic php paging class. (Like Google style)** You

PHP Generic paging class page. php [like google paging]. The copy code of page. php is as follows :? Php *** common php paging class. (Similar to Google style) ** you only need to provide two parameters: the total number of records and the number of

page.php Copy Code code as follows: /** * * General PHP Paging class. (Imitation Google style) * * Just provide a total number of records and two parameters per page display. (Detailed use instructions are attached.) * * without