Webi Processing Server - Cache

[DellSC]

I assume that when there are multiple Webi Processing Servers in a system they should share a common Cache folder, but I can't find any documentation on it (it's not in the admin manual) and someone has asked me whether that's indeed true.  Can anyone provide guidance on this?

Thanks!

-Dell

[former_member191664 · Accepted solution]

Hi,

Property  Description  Default Value 

Cache Timeout (minutes) Specifies the amount of time, in minutes, before the contents of the document cache will be cleared. The timeout depends on the most recent access date per document.  The default value is 4370 minutes. 

Document Cache Clean-up Interval (minutes) Specifies the time interval, in minutes, that the document cache is scanned and is checked against the Maximum Document Cache Size, Maximum Document Cache Reduction Space, and Maximum Document in Cache settings.  The default value is120 minutes. 

Disable Cache Sharing Specifies whether cache sharing is disabled. By default cache sharing is enabled; which means that all Web Intelligence Processing Server instances will share the same cache. However, if you prefer to have one cache per instance of Web Intelligence Processing Server then you should enable this property.  The default value is FALSE. 

Enable Document Cache Specifies whether the document cache is enabled. If the property is enabled, then the cache can be pre-loaded with scheduled Web Intelligence documents.  The default value is TRUE. 

Enable Real-Time Cache Specifies whether the real-time cache is enabled. If the property is enabled, then the cache can be loaded dynamically. Therefore, the Web Intelligence Processing Server caches Web Intelligence documents when they are viewed. The server also caches the documents when they run as a scheduled job, if the pre-cache was enabled in the document.  The default value is TRUE. 

Maximum Document Cache Size (KB) Specifies the maximum size of the document cache. Once this limit is reached the document cache will be cleared based on the Maximum Document Cache Reduction Space property.  The default value is 1000000 KB.

Maximum Document Cache Reduction Space  Specifies the percentage of cache that is emptied to allow newer actions and results to be stored in the cache. Documents with the oldest “last access time” are purged.  The default value is 70%. 

Output Cache Directory Specifies the location of the cache.  The default value is empty.

All these information is available in BI4.x CMC -> Help.

Hope this helps,

Jin-Chong

[DellSC · Accepted solution]

I've seen all of this, but it doesn't tell me whether the output cache directory should be set to a common folder when you're running mulitple Webi Processing servers, especially if they're on different servers.

-Dell

[former_member191664 · Accepted solution]

Hi,

I use the UNC path to point the output cache directory of all WIReportServer to a shared folder where they are all able to write to as domain account of SIA.

I follow this specification from XI3.1 Administration guide as well as XI3.1 SP2 release note.  However, did not find the reference in BI4.1 Admin guide, though.

Regards,

Jin-Chong

[Former Member]

With regards to the cache of webintelligenceprocessingserver, I also see a parameter called:

Maximum Documents in Cache.

Default this is set to 0.

So what does this mean? You can set all the parameters regarding caching but if this one stays on '0'(zero) none of the caching options will be in place?

Or

does 0 (zero) means undefined?