* [virtio-dev] Re: Transparent compress in virtio
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@ 2020-04-29 2:00 ` keens keens
2020-04-29 9:20 ` Stefan Hajnoczi
0 siblings, 1 reply; 2+ messages in thread
From: keens keens @ 2020-04-29 2:00 UTC (permalink / raw
To: virtio-dev@lists.oasis-open.org
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Hello virtio-dev team,
I want to compress all the data or files when the apps in VMs writes to a pass-through block device via kvm virtio.
And decompress the data when the apps in VMs trying to read the data from the pass-through block device on host.
My idea is to add a data transform layer into virtio architecture for the purpose of transparent compress.
I am reading the virtio.c, virtio_ring.c code, but have not found the place where I can do the data compress.
Is it feasible that we can add a filter into the virtio, and there is a chance to do data compress or encrypt in the filter?
Thanks
Keen
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* Re: [virtio-dev] Re: Transparent compress in virtio
2020-04-29 2:00 ` [virtio-dev] Re: Transparent compress in virtio keens keens
@ 2020-04-29 9:20 ` Stefan Hajnoczi
0 siblings, 0 replies; 2+ messages in thread
From: Stefan Hajnoczi @ 2020-04-29 9:20 UTC (permalink / raw
To: keens keens; +Cc: virtio-dev@lists.oasis-open.org
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On Wed, Apr 29, 2020 at 02:00:39AM +0000, keens keens wrote:
> I want to compress all the data or files when the apps in VMs writes to a pass-through block device via kvm virtio.
> And decompress the data when the apps in VMs trying to read the data from the pass-through block device on host.
>
> My idea is to add a data transform layer into virtio architecture for the purpose of transparent compress.
> I am reading the virtio.c, virtio_ring.c code, but have not found the place where I can do the data compress.
> Is it feasible that we can add a filter into the virtio, and there is a chance to do data compress or encrypt in the filter?
Can you use existing volume-level compression features instead of
reimplementing compression in virtio-specific code?
For example, the VDO device-mapper target is available for Linux:
https://github.com/dm-vdo/kvdo
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/deduplicating_and_compressing_storage/deploying-vdo_deduplicating-and-compressing-storage
If not, can you explain your use case in more detail?
Thanks,
Stefan
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2020-04-29 2:00 ` [virtio-dev] Re: Transparent compress in virtio keens keens
2020-04-29 9:20 ` Stefan Hajnoczi
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