[Gluster-users] about split-brain

[hwh at sangfor.com]

Is glusterfs bug ?  i want to know whether have some way to avoid this split-brain?



hwh at sangfor.com
 
From: Roman
Date: 2014-08-08 14:16
To: hwh at sangfor.com
CC: gluster-users
Subject: Re: Re: [Gluster-users] about split-brain
So try your tests again, but wait for synchronization first. You can check the state of files on servers with getfattr -d -m. -e hex /path-to-file-on-gluster-server
both should return 0x000000000000000000000000


2014-08-08 9:11 GMT+03:00 hwh at sangfor.com <hwh at sangfor.com>:
Yes, I do not wait for synchronization to complete.



hwh at sangfor.com
 
From: Roman
Date: 2014-08-08 13:53
To: hwh at sangfor.com
CC: gluster-users
Subject: Re: [Gluster-users] about split-brain
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

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-- 
Best regards,
Roman. 



-- 
Best regards,
Roman. 
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