All,

Two patches for adding HBW Block cache has been submitted

https://gerrit.cloudera.org/#/c/19726/
https://gerrit.cloudera.org/#/c/19764/

Change 19726 is the first patch that creates a interface NVM and HBW.
Change 19764 implements the HBW cache.

Benchmarks are in progress using this implementation as the baseline.

-sammy


-----Original Message-----
From: Nah, Sammy <sammy....@intel.com> 
Sent: Friday, April 14, 2023 5:34 AM
To: dev@kudu.apache.org
Subject: RE: [design doc] KUDU-3342: Add an implementation of the block cache 
on high bandwidth memory

Wrong link to Gerrit change.

https://gerrit.cloudera.org/#/c/19726/

-sammy

-----Original Message-----
From: Nah, Sammy <sammy....@intel.com>
Sent: Thursday, April 13, 2023 6:14 PM
To: dev@kudu.apache.org
Subject: RE: [design doc] KUDU-3342: Add an implementation of the block cache 
on high bandwidth memory

All,

First patch for KUDU-3342 has been submitted to 
https://gerrit.cloudera.org/#/c/19498/

Details commit steps available at https://github.com/apache/kudu/pull/53

-sammy

-----Original Message-----
From: Nah, Sammy <sammy....@intel.com>
Sent: Tuesday, March 7, 2023 6:43 PM
To: dev@kudu.apache.org
Subject: RE: [design doc] KUDU-3342: Add an implementation of the block cache 
on high bandwidth memory

Alexey,

Benchmarks are in progress which will be followed by a review process before we 
can share the results. I will give an update when I have the details.

Thanks for your suggestions.

-sammy

-----Original Message-----
From: Alexey Serbin <aser...@cloudera.com.INVALID>
Sent: Tuesday, March 7, 2023 6:10 PM
To: dev@kudu.apache.org
Subject: Re: [design doc] KUDU-3342: Add an implementation of the block cache 
on high bandwidth memory

Hi Sammy,

Thank you very much for working on this!

I took a quick look at the design draft and the patches.
I left a few comments on the design draft doc.

Implementation-wise, the Option1 approach looks reasonable to me.
There are few options how that might be done, and I guess we are about to 
converge on details in a few review/comment iterations.

Just curious: did you happen to run any benchmarks against a real hardware with 
HBW mamemory using the POC patch you posted at 
https://gerrit.cloudera.org/#/c/19498/ ?

Thanks!


Kind regards,

Alexey

On Fri, Feb 24, 2023 at 5:21 PM Nah, Sammy <sammy....@intel.com> wrote:

> Hi all,
>
> I'm working on a new block cache implementation (KUDU-3342<
> https://issues.apache.org/jira/browse/KUDU-3342>) and I drafted a 
> design doc[1] including motivation and background.
>
> The patch that I am working on is WIP[2] but there is a PoC patch[3] 
> that I've tested locally which shows that the implementation is feasible.
>
> Please review and any feedback would be appreciated.
>
> -sammy
>
> [1]
> https://docs.google.com/document/d/12zzk7clZpJZtfKoPDL6LB13jRuBSq5LZP2
> rVfx9T-oc/edit?usp=sharing [2] https://gerrit.cloudera.org/#/c/18686/
> [3] https://gerrit.cloudera.org/#/c/19498/
>
>

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