Re: [dm-devel] [PATCG]DM: dm-compression: a compressed DM target for SSD

2013-12-31 Thread Shaohua Li
On Sat, Dec 28, 2013 at 12:57:25PM +, Alasdair G Kergon wrote: > I've not looked at this in any depth, but here are some first > impressions: > > On Fri, Dec 27, 2013 at 02:24:21PM +0800, Shaohua Li wrote: > > This is a simple DM target supporting compression for SSD only. > > Presumably

Re: [dm-devel] [PATCG]DM: dm-compression: a compressed DM target for SSD

2013-12-31 Thread Shaohua Li
On Sat, Dec 28, 2013 at 12:57:25PM +, Alasdair G Kergon wrote: I've not looked at this in any depth, but here are some first impressions: On Fri, Dec 27, 2013 at 02:24:21PM +0800, Shaohua Li wrote: This is a simple DM target supporting compression for SSD only. Presumably there'll be

Re: [dm-devel] [PATCG]DM: dm-compression: a compressed DM target for SSD

2013-12-28 Thread Alasdair G Kergon
On Sat, Dec 28, 2013 at 12:57:25PM +, Alasdair G Kergon wrote: > To use this compression target above dm-thin (likely to prefer larger > block sizes), for example, could the block sizes be adapatable / > configurable? So a key feature of the underlying thin provisioning needs to be efficient

Re: [dm-devel] [PATCG]DM: dm-compression: a compressed DM target for SSD

2013-12-28 Thread Alasdair G Kergon
I've not looked at this in any depth, but here are some first impressions: On Fri, Dec 27, 2013 at 02:24:21PM +0800, Shaohua Li wrote: > This is a simple DM target supporting compression for SSD only. Presumably there'll be other disk layouts and other types of compression in future, so if you

Re: [dm-devel] [PATCG]DM: dm-compression: a compressed DM target for SSD

2013-12-28 Thread Alasdair G Kergon
I've not looked at this in any depth, but here are some first impressions: On Fri, Dec 27, 2013 at 02:24:21PM +0800, Shaohua Li wrote: This is a simple DM target supporting compression for SSD only. Presumably there'll be other disk layouts and other types of compression in future, so if you

Re: [dm-devel] [PATCG]DM: dm-compression: a compressed DM target for SSD

2013-12-28 Thread Alasdair G Kergon
On Sat, Dec 28, 2013 at 12:57:25PM +, Alasdair G Kergon wrote: To use this compression target above dm-thin (likely to prefer larger block sizes), for example, could the block sizes be adapatable / configurable? So a key feature of the underlying thin provisioning needs to be efficient