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тАО04-24-2018 06:21 AM
тАО04-24-2018 06:21 AM
What are the functions performed by Control Cache and Data Cache?
Is there any documentation that details what functions are performed by the Cache Control and by the Data Cache and why the difference in size between them?
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тАО04-24-2018 06:27 AM
тАО04-24-2018 06:27 AM
Re: What are the functions performed by Control Cache and Data Cache?
3PAR Storage Architecture
https://h20195.www2.hpe.com/v2/getpdf.aspx/4aa3-3516enw.pdf
3PAR Best Practice
https://h20195.www2.hpe.com/v2/GetPDF.aspx/4AA4-4524ENW.pdf
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тАО04-24-2018 06:32 AM
тАО04-24-2018 06:32 AM
Re: What are the functions performed by Control Cache and Data Cache?
Also 3PAR Concepts Guide
https://support.hpe.com/hpsc/doc/public/display?docId=c04204225
data cache
The dual in-line memory modules that support the HPE 3PAR ASIC located in a controller node.
control cache
Memory modules that support the microprocessors located in a controller node
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тАО04-24-2018 06:49 AM
тАО04-24-2018 06:49 AM
Re: What are the functions performed by Control Cache and Data Cache?
Well now that you know Data and Control Cache, you can also know what is adaptive cache used in 3PAR?
Refer the below weblink to know that:
HPE 3PAR Adaptive Flash Cache
https://h20195.www2.hpe.com/v2/getpdf.aspx/4AA5-5397ENW.pdf
I am an HPE Employee
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If it resolves the issue, please consider marking it as an Accepted Solution.
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тАО04-24-2018 10:10 AM - edited тАО04-28-2018 10:46 PM
тАО04-24-2018 10:10 AM - edited тАО04-28-2018 10:46 PM
Re: What are the functions performed by Control memory and Cache memory?
Control memory is just regular CPU memory. The Data cache stores the I/O requests before they are written and satisfies read requests.
shownode will list the sizes.
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тАО04-25-2018 06:06 AM
тАО04-25-2018 06:06 AM
Re: What are the functions performed by Control Cache and Data Cache?
Thanks Dennis in this way I can conclude that the InformOS uses the Cache Control for its operation, File Persona and Compression also use the Cache Control. In the 8000 family how much of the control cache is dedicated to Inform OS?
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тАО04-28-2018 10:45 PM - edited тАО04-28-2018 10:47 PM
тАО04-28-2018 10:45 PM - edited тАО04-28-2018 10:47 PM
Re: What are the functions performed by Control memory and Cache memory?
> the Cache memory for its operation
Cache memory is used for user data.
> File Persona and Compression also use Control memory.
Yes.
> how much of control memory is dedicated to HPE 3PAR OS?
If you have File Persona installed, 8 GiB is reserved. All of the rest is for the OS.