FSC Configuration

[Sadiq]

Dear All,

Could anybody help me regarding WholeFilecache and Segment cache ?

Why and when it is used, does it have anything to do with the performance .

Best Regards,
Sadiq 

[RandyEllsworth]

A segment cache is required for some file types like JT (streamed). A file can reside all in one segment or across several segments. The size and number of segments can be "tuned" for optimal performance as the OOTB values are not sufficient for a Production environment. See TC_ROOT\fsc\bin\FMSCacheSizingTool_Ver_1_3.zip for tuning a segment cache.

A whole file cache (WFC) does not require any tuning. A file resides in the WFC the same as in a Volume which is handy for retrieving lost files from backup. WFC is a great option to reduce administrative overhead and can be spread across several disks (partitions). Use FSCWholeFileCacheUtil utility to manage a WFC.

[Projyal]

Sadiq

Here is the difference in a nutshell:

A. Whole File Cache : The file is stored in the cache as a "whole file". This is our normal everyday file.

B. Segment cache: Think of this as a memory map of the file. The files are stored in chunks (different fron the OS chunks) and while accessing these chunks are threaded together to create the file.

Now given that whole file cache is our regular file you can easily use NFS or other network storage for your cache.

For the same reason it is easy to apply all housekeeping, including redundancy, that you can apply on regular files.

You no longer have to buy local disk or a special card to make network disk appear local to the operating system.

Some platforms used to have problems with the memory mapping, whole file cache overcomes it.

There should not be any perceivable performance issue, we have maintained the fast access for clients when we provided the whole file cache capability.

Hope that helps

Best Regards

Projyal Dev

[Sadiq]

Thanks for the update ,

Regards,

Sadiq 

[Sadiq]

Thanks for the update Projyal,

I can undertand it much better.

Best Regards,

Sadiq