Re: [SPDK] Blob store

Re: [SPDK] Blob store

[Walker, Benjamin]

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On Thu, 2017-06-15 at 09:16 -0700, tejasgole wrote:
> Hi,
> 
> Is there any example code for blob store to use nvme device directly without
> the block dev layer? 
> 
> If not, is there even a document on the order in which APIs need to be invoked
> to set this up correctly? 
> 
> The way I have it setup, spdk_bs_init () followed by spdk_bs_md_create_blob ()
> both succeed, but spdk_bs_md_open_blob () spins forever. 
> 
> It keeps issuing reads to lba=3.

I haven't written an example for how to do this yet. Are you able to test the
blob store using the bdev layer like in the rest of the examples for now? I
think that will be a lot more straightforward, but if there are concerns about
the bdev layer I'd love to understand what those are.

> 
> Thanks 
> 
> _______________________________________________
> SPDK mailing list
> SPDK(a)lists.01.org
> https://lists.01.org/mailman/listinfo/spdk

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Re: [SPDK] Blob store

[tejasgole]

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I got past the issue. The issue was blob store block size (4K) was mismatched with the nvme device  (512b). Once I converted correctly,  everything worked.


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-------- Original message --------From: "Walker, Benjamin" <benjamin.walker(a)intel.com> Date: 6/30/17  9:13 AM  (GMT-08:00) To: spdk(a)lists.01.org Subject: Re: [SPDK] Blob store 
On Thu, 2017-06-15 at 09:16 -0700, tejasgole wrote:
> Hi,
> 
> Is there any example code for blob store to use nvme device directly without
> the block dev layer? 
> 
> If not, is there even a document on the order in which APIs need to be invoked
> to set this up correctly? 
> 
> The way I have it setup, spdk_bs_init () followed by spdk_bs_md_create_blob ()
> both succeed, but spdk_bs_md_open_blob () spins forever. 
> 
> It keeps issuing reads to lba=3.

I haven't written an example for how to do this yet. Are you able to test the
blob store using the bdev layer like in the rest of the examples for now? I
think that will be a lot more straightforward, but if there are concerns about
the bdev layer I'd love to understand what those are.

> 
> Thanks 
> 
> _______________________________________________
> SPDK mailing list
> SPDK(a)lists.01.org
> https://lists.01.org/mailman/listinfo/spdk

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[SPDK] Blob store

[tejasgole]

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Hi,
Is there any example code for blob store to use nvme device directly without the block dev layer? 
If not, is there even a document on the order in which APIs need to be invoked to set this up correctly? 
The way I have it setup, spdk_bs_init () followed by spdk_bs_md_create_blob () both succeed, but spdk_bs_md_open_blob () spins forever. 
It keeps issuing reads to lba=3.
Thanks 

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