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@@ -1,4 +1,4 @@
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-1. Flatstore Module
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+1. Db_flatstore Module
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Jan Janak
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@@ -10,77 +10,74 @@ Jan Janak
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Revision $Revision$ $Date$
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__________________________________________________________________
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- 1.1. Overview
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-
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- 1.1.1. Rotating Log Files
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-
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- 1.2. Parameters
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-
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- 1.2.1. flush (integer)
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-
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1.1. Overview
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- Flatstore is one of so-called SER database modules. It does not export
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- any functions executable from the configuration scripts, but it exports
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- a subset of functions from the database API and thus other module can
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- use it instead of, for example, mysql module.
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+ Db_flatstore is one of so-called SIP Router database modules. It does
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+ not export any functions executable from the configuration scripts, but
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+ it exports a subset of functions from the database API and thus other
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+ modules can use it as a database driver, instead of, for example, the
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+ Mysql module.
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- The module does not export all functions of the database API, it
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- supports only one function, insert. The module is limited but very
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- fast. It is especially suitable for storing accounting information on
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- sites with extremely high traffic. If MySQL is too slow or if you get a
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- huge amount of accounting data then you can consider using this module.
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- Note that the acc module is the only module that was tested with
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- flastore.
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+ The module does not implement all functions of the database API, it
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+ supports only one function, insert. This means that the module is
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+ limited but very fast. It is especially suitable for storing accounting
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+ information on sites with extremely high traffic. If MySQL is too slow
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+ or if you get a huge amount of accounting data then you can consider
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+ using this module. Please note that the acc module is the only module
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+ that was tested with the flastore module.
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The format of the files produced by this module is plain text. Each
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- line consists of several fields, fields are separated by | character.
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- New information is always appended at the end of the file, searching,
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- deleting and updating of existing data is not supported by the module.
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+ line consists of several fields, fields are separated by the "|"
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+ character (vertical bar). New information is always appended at the end
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+ of the file. Searching, deleting and updating of existing data is not
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+ supported by the module.
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- The acc module can be configured to use flatstore module as database
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+ The acc module can be configured to use db_flatstore module as database
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backend using the db_url_parameter:
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modparam("acc", "db_url", "flatstore:/var/log/acc")
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- This configuration options tells acc module that it should use the
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- flatstore module and the flatstore module should create all files in
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- /var/log/acc directory. The directory must exist and SER processes must
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- have permissions to create files in that directory.
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+ This configuration option tells the acc module that it should use the
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+ db_flatstore module and the db_flatstore module should create all files
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+ in the /var/log/acc directory. The directory must exist and SIP Router
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+ processes must have permissions to create files in that directory.
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Name of files in that directory will follow the following pattern:
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<table_name>_<process_name>.log
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- For example, entries writen by SER process 8 into acc table would be
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- written in file acc_8.log. For each table there will be several files,
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- one file for every SER process that wrote some data into that table.
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- The main reason why there are several files for each table is that it
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- is much faster to have one file per process, because it does not
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- require any locking and thus SER processes will not block each other.
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- To get the complete data for a table you can simply concatenate the
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- contents of files with the same table name but different process id.
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+ For example, entries writen by the SIP Router process 8 into the acc
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+ table would be written in file acc_8.log. For each table there will be
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+ several files, one file for every SIP Router process that wrote some
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+ data into that table. The main reason why there are several files for
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+ each table is that it is much faster to have one file per process,
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+ because it does not require any locking and thus SIP Router processes
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+ will not block each other. To get the complete data for a table you can
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+ simply concatenate the contents of files with the same table name but
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+ different process id.
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1.1.1. Rotating Log Files
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- There is a new SER FIFO interface command called flat_rotate. When SER
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- receives the command then it will close and reopen all files used by
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- flatstore module. The rotation itself has to be done by another
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- application (such as logrotate). Follow these steps to rotate files
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- generated by flatstore module:
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+ The module implements a SIP Router management interface command called
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+ flatstore.rotate. When SIP Router receives the command it will close
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+ and reopen all files used by the db_flatstore module. The rotation
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+ itself has to be done by another application (such as logrotate).
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+ Follow these steps to rotate files generated by the db_flatstore
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+ module:
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* Rename the files that you want to rotate:
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cd /var/log/acc
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mv acc_1.log acc_1.log.20050605
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mv acc_2.log acc_2.log.20050605
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mv acc_4.log acc_3.log.20050605
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...
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- Note that at this point SER will still be writing all data into the
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- renamed files.
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- * Send SER the fifo command to close and reopen the renamed files:
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-serctl fifo flat_rotate
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- This will force SER to close the renamed files and open new ones
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- with original names, such as acc_1.log. New files will be open at
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- the point when SER has some data to write. It is normal that the
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- files will be not created immediately if there is no traffic on the
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- proxy server.
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+ Note that at this point SIP Router will still be writing all data
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+ into the renamed files.
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+ * Send SIP Router the management command to close and reopen the
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+ renamed files:
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+sercmd flatstore.rotate
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+ This will force SIP Router to close the renamed files and open new
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+ ones with original names, such as acc_1.log. New files will be open
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+ at the point when SIP Router has some data to write. It is normal
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+ that the files will be not created immediately if there is no
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+ traffic on the SIP server.
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* Move the renamed files somewhere else and process them.
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1.2. Parameters
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