Re: Kernel RBD Readahead

2015-10-13 Thread Olivier Bonvalet
Le mardi 25 août 2015 à 17:50 +0300, Ilya Dryomov a écrit : > > Ok. I might try and create a 4.1 kernel with the blk-mq queue > depth/IO size + readahead +max_segments fixes in as I'm think the > TCP_NODELAY bug will still be present in my old 3.14 kernel. > > I can build 4.2-rc8 + readahead

Re: Kernel RBD Readahead

2015-10-13 Thread Ilya Dryomov
On Tue, Oct 13, 2015 at 11:33 AM, Olivier Bonvalet wrote: > Le mardi 25 août 2015 à 17:50 +0300, Ilya Dryomov a écrit : >> > Ok. I might try and create a 4.1 kernel with the blk-mq queue >> depth/IO size + readahead +max_segments fixes in as I'm think the >> TCP_NODELAY bug

Re: Kernel RBD Readahead

2015-10-13 Thread Olivier Bonvalet
Le mardi 13 octobre 2015 à 12:20 +0200, Ilya Dryomov a écrit : > On Tue, Oct 13, 2015 at 11:33 AM, Olivier Bonvalet < > ceph.l...@daevel.fr> wrote: > > Le mardi 25 août 2015 à 17:50 +0300, Ilya Dryomov a écrit : > > > > Ok. I might try and create a 4.1 kernel with the blk-mq queue > > > depth/IO

Re: Kernel RBD Readahead

2015-08-25 Thread Ilya Dryomov
On Tue, Aug 25, 2015 at 5:05 PM, Nick Fisk n...@fisk.me.uk wrote: -Original Message- From: Ilya Dryomov [mailto:idryo...@gmail.com] Sent: 25 August 2015 09:45 To: Nick Fisk n...@fisk.me.uk Cc: Ceph Development ceph-devel@vger.kernel.org Subject: Re: Kernel RBD Readahead On Tue, Aug

Re: Kernel RBD Readahead

2015-08-25 Thread Ilya Dryomov
On Tue, Aug 25, 2015 at 10:40 AM, Nick Fisk n...@fisk.me.uk wrote: I have done two tests one with 1MB objects and another with 4MB objects, my cluster is a little busier than when I did the quick test yesterday, so all speeds are slightly down across the board but you can see the scaling

Re: Kernel RBD Readahead

2015-08-24 Thread Ilya Dryomov
On Sun, Aug 23, 2015 at 10:23 PM, Nick Fisk n...@fisk.me.uk wrote: -Original Message- From: Ilya Dryomov [mailto:idryo...@gmail.com] Sent: 23 August 2015 18:33 To: Nick Fisk n...@fisk.me.uk Cc: Ceph Development ceph-devel@vger.kernel.org Subject: Re: Kernel RBD Readahead On Sat

Re: Kernel RBD Readahead

2015-08-24 Thread Ilya Dryomov
ceph-devel@vger.kernel.org Subject: Re: Kernel RBD Readahead On Sat, Aug 22, 2015 at 11:45 PM, Nick Fisk n...@fisk.me.uk wrote: Hi Ilya, I was wondering if I could just get your thoughts on a matter I have run into? Its surrounding read performance of the RBD kernel client and blk-mq

Re: Kernel RBD Readahead

2015-08-24 Thread Ilya Dryomov
On Mon, Aug 24, 2015 at 7:00 PM, Nick Fisk n...@fisk.me.uk wrote: -Original Message- From: Ilya Dryomov [mailto:idryo...@gmail.com] Sent: 24 August 2015 16:07 To: Nick Fisk n...@fisk.me.uk Cc: Ceph Development ceph-devel@vger.kernel.org Subject: Re: Kernel RBD Readahead On Mon, Aug

Re: Kernel RBD Readahead

2015-08-24 Thread Ilya Dryomov
On Mon, Aug 24, 2015 at 11:11 PM, Nick Fisk n...@fisk.me.uk wrote: -Original Message- From: Ilya Dryomov [mailto:idryo...@gmail.com] Sent: 24 August 2015 18:19 To: Nick Fisk n...@fisk.me.uk Cc: Ceph Development ceph-devel@vger.kernel.org Subject: Re: Kernel RBD Readahead On Mon

Re: Kernel RBD Readahead

2015-08-23 Thread Ilya Dryomov
On Sat, Aug 22, 2015 at 11:45 PM, Nick Fisk n...@fisk.me.uk wrote: Hi Ilya, I was wondering if I could just get your thoughts on a matter I have run into? Its surrounding read performance of the RBD kernel client and blk-mq, mainly when doing large single threaded reads. During testing