[SPDK] Support for multiple RocksDB databases

[SPDK] Support for multiple RocksDB databases

[Josh Perschon]

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Hello,

I've been reviewing the SPDK RocksDB integration and was wondering if there
is support for multiple databases on the same bdev.  BlobFS only supports 1
namespace/no directories, which leads me to think that only 1 database per
bdev is supported although the abstractions BlobFS uses for files are
different than most file systems so I'm not sure.

Thanks,
Josh

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Re: [SPDK] Support for multiple RocksDB databases

[Chang, Cunyin]

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Hi Josh,

We are trying to support the multiple databases on the same bdev, we already have some patches merged to the master branch,
https://review.gerrithub.io/#/c/374558/
but we still need some patches for the blobstore to make sure it works for multiple databases tests from rocksdb, they are still under review.

-Cunyin

From: SPDK [mailto:spdk-bounces(a)lists.01.org] On Behalf Of Josh Perschon
Sent: Thursday, September 7, 2017 5:08 AM
To: spdk(a)lists.01.org
Subject: [SPDK] Support for multiple RocksDB databases

Hello,

I've been reviewing the SPDK RocksDB integration and was wondering if there is support for multiple databases on the same bdev.  BlobFS only supports 1 namespace/no directories, which leads me to think that only 1 database per bdev is supported although the abstractions BlobFS uses for files are different than most file systems so I'm not sure.
Thanks,
Josh

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