[Gluster-devel] Direct IO and Async IO

[Gareth Bult]

Heh, 

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 ? 

Gareth. 


----- 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? 

avati 


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

Hi, 

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 ...) 
tia 
Gareth. 
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