Transformer SDK For C  7.1.9.29929-d422075
Configuration: Caching

memory-file

Type: String
Default: None

Location of the file where the Transformer's cache is save to on shutdown and restored from on startup.

The following expansions can be made:


write-cache-period

Type: Floating Point Value
Default: -1.000000

Interval to write the cache file at (seconds)


memory-hash-size

Type: Integer
Default: 16384

Size of hashtable used for storing all cached objects. The value of this should be roughly twice the total number of objects that you wish to cache.


add-purge

Type: Function
Default: None

If the Transformer is consuming data from a broadcast feed, it may be useful to remove objects from the database that have not been updated after a certain period of time.

Format:

add-purge <time> <days> <object pattern>

Where <time> is the number of minutes past minute that the purging should happen. <days> is the number of days that should have elapsed since an update occurred. <object pattern> details that objects that this purge should be applied to.

The purging will occur every day at the configure <time>.

Example: Purge at 04:00, all objects under the /I directory that haven't had an an update in 7 days

add-purge 240 7 /I/*

record-max-cache

Type: Integer
Default: 10

The maximum number of elements of type 3 data to keep for each record.


type2-hash-size

Type: Integer
Default: 65536

The size of the type 2 data hashtable. The value of this option should be set to the maximum number of type 2 updates that need to be cached.


news-max-headlines

Type: Integer
Default: -1

Maximum number of news headlines to cache. The default of -1 means that all news headlines will be cached and none will be removed unless removed by a F_DELETE_HEADLINE message or purged using news-purge-time.


news-purge-time

Type: Integer
Default: -1

This represents the number of minutes from midnight that the purge of news headlines (i.e. deletion from the cache) should take place.

The default of -1 indicates that no purge takes place, in which case news-max-headlines will limit the number of cached hearlines.


news-purge-days

Type: Floating Point Value
Default: 0.000000

Number of days-worth of headlines to keep when purging.


add-newsconfig

Configuration group add-newsconfig

This configuration group allows the days-worth and maximum number of cached headlines to be tuned for a particular news symbol.

symbol

Type: String
Default: None

News symbol that this group applies to.


purge-days

Type: Floating Point Value
Default: 0.000000

Number of days-worth of headlines to keep when purging. The purging will occur at the time specified by the news-purge-time configuration option.


max-headlines

Type: Integer
Default: -1

Maximum number of news headlines to cache. The default of -1 means that all news headlines will be cached and none will be removed unless removed by a F_DELETE_HEADLINE message or purged using news-purge-time.




Generated on Mon Jul 20 2020 19:17:22 for Transformer SDK For C