Gluster users - Aug 2014 - about split-brain

hi:

I have a problem about split-brain, details as below:

PC1 and PC2 is AFR, stored a file 1.txt

1. write "123" to 1.txt, then 1.txt in pc1 is same with 1.txt in PC2,
content is "123"

2. PC1  network disconnect, write "45" to 1.txt, then  content of
1.txt in pc1 is "123",
  
   content of 1.txt in pc2 is "12345"

3. PC2  network disconnect, but PC1 network is good, write "67" to
1.txt, then  content of 1.txt in pc1 is "12367",
  
   content of 1.txt in pc1 is "12345"

4. so split brain occur


how glusterfs avoid this? Have some ways to solve? this is my questions. thank
you



hwh at sangfor.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://supercolony.gluster.org/pipermail/gluster-users/attachments/20140808/95e7306c/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: CatchC5D8.jpg
Type: image/jpeg
Size: 13852 bytes
Desc: not available
URL:
<http://supercolony.gluster.org/pipermail/gluster-users/attachments/20140808/95e7306c/attachment.jpg>

Hello,

Did you wait for synchronization to complete before plugging second server
off? Usually it need 10-15 minutes. Sometimes faster.


2014-08-08 5:19 GMT+03:00 hwh at sangfor.com <hwh at sangfor.com>:
> hi:
>
> I have a problem about split-brain, details as below:
>
> PC1 and PC2 is AFR, stored a file 1.txt
>
> 1. write "123" to 1.txt, then 1.txt in pc1 is same with 1.txt in
PC2,
> content is "123"
>
> 2. PC1  network disconnect, write "45" to 1.txt, then  content of
1.txt
> in pc1 is "123",
>
>    content of 1.txt in pc2 is "12345"
>
> 3. PC2  network disconnect, but PC1 network is good, write "67"
to 1.txt,
>  then  content of 1.txt in pc1 is "12367",
>
>    content of 1.txt in pc1 is "12345"
>
> 4. so split brain occur
>
>
> how glusterfs avoid this? Have some ways to solve? this is my questions.
> thank you
>
> ------------------------------
> hwh at sangfor.com
>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://supercolony.gluster.org/mailman/listinfo/gluster-users
>


-- 
Best regards,
Roman.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://supercolony.gluster.org/pipermail/gluster-users/attachments/20140808/ce18b171/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: CatchC5D8.jpg
Type: image/jpeg
Size: 13852 bytes
Desc: not available
URL:
<http://supercolony.gluster.org/pipermail/gluster-users/attachments/20140808/ce18b171/attachment.jpg>