[Gluster-devel] Direct IO and Async IO

Gareth Bult gareth at encryptec.net
Wed Jan 30 10:51:00 UTC 2008


I was using 2.6.22, but have downgraded to 2.6.18 because that's the Xen development version ... so .. I really need to be on 2.6.22 .. fantastic .. ;-) 

I'm using the z-research fuse, is that good enough or do I actually need a complete 2.6.22 kernel ? 


----- Original Message ----- 
step 3.: "Anand Avati" <avati at zresearch.com> 
To: "Gareth Bult" <gareth at encryptec.net> 
Cc: "gluster-devel Glister Devel List" <gluster-devel at nongnu.org> 
Sent: 30 January 2008 10:12:16 o'clock (GMT) Europe/London 
Subject: Re: [Gluster-devel] Direct IO and Async IO 

Fuse supports AIO on non direct-io file descriptors after 2.6.19. which kernel version are you using? 


2008/1/30, Gareth Bult < gareth at encryptec.net >: 


I'm trying to get XEN instances to run on Gluster .. and they run on the "file:" driver no problems at all. 

However I'm being recommended the "tap:aio" driver as the "file:" driver has many problems with regards to flushing and data loss. 

It does appear however that aio:tap does not get on (at all) with Gluster. 

The requirements appear to be Direct IO and Async transfers ... can anyone think of a reason why the XEN driver might not want to talk to Gluster? 
(apparently it works fine on other network filesystems such as NFS) 

(I've tried mounting the glusterfs with Direct IO enabled and disabled, but it makes no difference ...) 
Gluster-devel mailing list 
Gluster-devel at nongnu.org 

If I traveled to the end of the rainbow 
As Dame Fortune did intend, 
Murphy would be there to tell me 
The pot's at the other end. 

More information about the Gluster-devel mailing list