[Gluster-devel] Re; Bug #21918

[Gareth Bult]

Well, I must admit I have the same problem, my initial testing on this was flawed and I jumped the gun a little. 

xen block-detach and xen block-attach "should" do this, but there is a problem, which I'm "hoping" is attached to the "file:" driver. 
At the moment I'm working on a 2.6.21 kernel which should support AIO on gluster (?!) and my next target is to see whether this driver performs better then "file:" with regards to xen detatch and attach. 

If this does work, it should be possible to script drive removal / re-add from the Dom0 after you restart glusterfsd .... 

(?!) 

----- Original Message ----- 
step 3.: "Jonathan Galentine" <j.galentine at gmail.com> 
To: "Gareth Bult" <gareth at encryptec.net>, gluster-devel at nongnu.org 
Sent: 31 January 2008 13:22:01 o'clock (GMT) Europe/London 
Subject: Re: [Gluster-devel] Re; Bug #21918 

I tried this, how did you handle the case when a node fails? You can't remount the glusterfs client partition when the node comes back up, because it is marked in use/busy and umount -f does not seem to work (it has a file 'open', but you receive a transport error when trying to access it or the mount.) Does the gluster client have a remount option? 


On Jan 29, 2008 4:27 AM, Gareth Bult < gareth at encryptec.net > wrote: 


Hi, 

Many thanks .. fyi; I found a way around the self-heal issue for XEN users, this also leads to a huge performance boost. 

I'm running two gluster filesystems (no self heal on either) then running software raid "inside" the DomU across file images, one on each system. 
Read-thruput on the DomU is 95%+ of the speed of the local disk. 

(and self-heal is performed by software raid rather than gluster) 

Regards, 
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: 29 January 2008 03:02:00 o'clock (GMT) Europe/London 
Subject: Re: [Gluster-devel] Re; Bug #21918 

Gareth, 
this will be addressed in the next afr commit, self heal is being worked on AFR. We are even working on self healing files with holes, but that might be a week beyond. 

avati 


2008/1/28, Gareth Bult < gareth at encryptec.net >: 

Hi, 

There's one issue that's stopping me going production atm, which is documented in #21918. 

Any news on this .. it does seem fairly "critical" to Gluster being usable ... ??? 

tia 
Gareth. 
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