+ Torben, Dan Hello, DirectFS name has been deprecated and the new name for the Flash aware filesystem from Fusion-io is NVMFS (NonVolatile Memory FileSystem). NVMFS a fully POSIX compliant filesystem is currently in EA (early access) and can be obtained by signup for the program (by reaching out to Torben/Dan cc-ed ). Please note NVM Compression (page-compression) solution stack uses POSIX interfaces only, and is not “directly" dependent on opennvm intrefaces. Thanks, Joy Dhananjoy Das Architect Sr.,| Office: 408.416.5816 Cell: 408.596.1533 | Email: ddas@fusionio.com<mailto:gkerr@fusionio.com> Check out some brief videos: A Brief History of NAND Flash Storage<http://www.youtube.com/watch?v=w-_Hr5f7QHw> Whiteboarding with the Woz: Virtualization, the Basics<http://www.youtube.com/watch?v=fY3yVElwz5g&list=PLYp8b4bSLEi-qyQBiGFBkHv80ogIfUZn4&index=4> [cid:BD491E35-4252-4A52-8DC1-DB493990901B] From: Nirbhay Choubey <nirbhay@skysql.com<mailto:nirbhay@skysql.com>> Date: Tuesday, June 17, 2014 at 5:20 AM To: Colin Charles <colin@mariadb.org<mailto:colin@mariadb.org>> Cc: Callaghan Mark <mdcallag@gmail.com<mailto:mdcallag@gmail.com>>, Fusion-io Admin <ddas@fusionio.com<mailto:ddas@fusionio.com>>, MariaDB discuss <maria-discuss@lists.launchpad.net<mailto:maria-discuss@lists.launchpad.net>> Subject: Re: [Maria-discuss] fusion io Hi, On Tue, Jun 17, 2014 at 7:02 AM, Colin Charles <colin@mariadb.org<mailto:colin@mariadb.org>> wrote: Hi Mark, On 14 Jun 2014, at 00:44, MARK CALLAGHAN <mdcallag@gmail.com<mailto:mdcallag@gmail.com>> wrote:

Where can directFS be downloaded? This is open source, right?

From what I gather, there is a public API to this called OpenNVM (http://opennvm.github.io/). But the short answer is that directfs/nvmfs isn't opensource - you only get this if you have a fusion-io card

Found this in one of the fusion-io's blogs : " We plan to release directFS as an open source file system to demonstrate the usage and benefits of native interfaces." http://www.fusionio.com/blog/under-the-hood-of-the-iomemory-sdk Best, Nirbhay Fusion-io itself is a commercial product, so nvmfs/directfs is likely from them only (and is probably closed source). I take it others can implement it, but haven't (yet?) ? MariaDB's initial implementation of it is here: http://lists.askmonty.org/pipermail/commits/2013-March/004529.html (and I presume this was then ported to Percona Server as well -- http://www.percona.com/doc/percona-server/5.6/performance/atomic_fio.html) It seems the magic is at: #define DFS_IOCTL_ATOMIC_WRITE_SET _IOW(0x95, 2, uint) I found a presentation that talks about it (nothing about the filesystem itself being opensource): http://www.slideshare.net/fusionio/perconalive-accelerating-mysql-in-open-so... And for reference some older blog posts: https://blog.mariadb.org/significant-performance-boost-with-new-mariadb-page... https://blog.mariadb.org/mariadb-introduces-atomic-writes/ And attached for brevity, is a short chat I had with Jan Lindström who works on the fusion-io code now: 11:42 < bytee> jplindst: our fusion-io work, is based on the open APIs at http://opennvm.github.io/ correct? 11:46 < jplindst> bytee: To be totally honest, I have no idea what are the API at the http page you mentioned, I have used standard POSIX interfaces to access FusionIO storage, thus you will need FusionIO SSD card and NVMFS file system 11:47 < bytee> jplindst: nvmfs file system - where does one get it ? from fusion-io ? 11:47 < jplindst> bytee: FusionIO card is naturally commercial product, nvmfs to current my understanding does not work with any other device 11:48 < bytee> jplindst: ok, likely because others haven't implemented it 11:48 < jplindst> bytee: correct 11:49 < jplindst> bytee: If you have the card you should have the file system module 11:50 < bytee> jplindst: thanks 11:51 < jplindst> bytee: Last time we did discuss with FusionIO the actual file system was not yet open source 11:51 < jplindst> bytee: not sure if that has been changed now that announcements are out 11:51 < bytee> jplindst: doubt there is, from what i gathere I hope this helps cheers, -colin

On Tue, Jun 10, 2014 at 5:18 PM, Daniel Black <daniel.black@openquery.com<mailto:daniel.black@openquery.com>> wrote:

Thanks Colin. Missed that line of the doco and/or assumed it was a capability of another file-system.

----- Original Message -----

...

Special ioctl doesn't work unless you use directfs (you're using ext4); see: https://mariadb.com/kb/en/fusionio-directfs-atomic-write-support/

On Wednesday, 11 June 2014, Daniel Black < daniel.black@openquery.com<mailto:daniel.black@openquery.com>

...

wrote:

Hi,

I'm trying to get innodb_use_atomic_writes = 1 working on an ext4 on top of LVM on a ioDrive device with a RHEL6 kernel 2.6.32-358.6.2.el6.x86_64

and getting the following error. Which bit(s) need to change to get it working?

140611 7:43:46 InnoDB: Operating system error number 25 in a file operation. InnoDB: Error number 25 means 'Inappropriate ioctl for device'. InnoDB: Some operating system error numbers are described at InnoDB: http://dev.mysql.com/doc/refman/5.5/en/operating-system-error-codes.html InnoDB: File name ./ibdata1 InnoDB: File operation call: 'ioctl'. InnoDB: Error in opening ./ibdata1

-- -- Daniel Black, Engineer @ Open Query ( http://openquery.com.au ) Remote expertise & maintenance for MySQL/MariaDB server environments.

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-- -- Daniel Black, Engineer @ Open Query (http://openquery.com.au) Remote expertise & maintenance for MySQL/MariaDB server environments.

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-- Mark Callaghan mdcallag@gmail.com<mailto:mdcallag@gmail.com>

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