Re: Fwd: Fwd: [newstore (again)] how disable double write WAL

2015-12-07 Thread Dave Chinner
On Fri, Dec 04, 2015 at 03:12:25PM -0500, Ric Wheeler wrote: > On 12/01/2015 05:02 PM, Sage Weil wrote: > >Hi David, > > > >On Tue, 1 Dec 2015, David Casier wrote: > >>Hi Sage, > >>With a standard disk (4 to 6 TB), and a small flash drive, it's easy > >>to create an ext4 FS with metadata on flash

Re: Fwd: Fwd: [newstore (again)] how disable double write WAL

2015-12-04 Thread Eric Sandeen
On 12/4/15 2:12 PM, Ric Wheeler wrote: > On 12/01/2015 05:02 PM, Sage Weil wrote: >> Hi David, >> >> On Tue, 1 Dec 2015, David Casier wrote: >>> Hi Sage, >>> With a standard disk (4 to 6 TB), and a small flash drive, it's easy >>> to create an ext4 FS with metadata on flash >>> >>> Example with

Re: Fwd: Fwd: [newstore (again)] how disable double write WAL

2015-12-04 Thread Ric Wheeler
On 12/01/2015 05:02 PM, Sage Weil wrote: Hi David, On Tue, 1 Dec 2015, David Casier wrote: Hi Sage, With a standard disk (4 to 6 TB), and a small flash drive, it's easy to create an ext4 FS with metadata on flash Example with sdg1 on flash and sdb on hdd : size_of() { blockdev --getsize

Fwd: Fwd: [newstore (again)] how disable double write WAL

2015-12-01 Thread David Casier
FYI -- Forwarded message -- From: David Casier Date: 2015-12-01 21:32 GMT+01:00 Subject: Re: Fwd: [newstore (again)] how disable double write WAL To: Sage Weil Cc: Sébastien VALSEMEY , Vish Maram-SSI

Re: Fwd: Fwd: [newstore (again)] how disable double write WAL

2015-12-01 Thread Sage Weil
Hi David, On Tue, 1 Dec 2015, David Casier wrote: > Hi Sage, > With a standard disk (4 to 6 TB), and a small flash drive, it's easy > to create an ext4 FS with metadata on flash > > Example with sdg1 on flash and sdb on hdd : > > size_of() { > blockdev --getsize $1 > } > > mkdmsetup() { >