On 08/08/2014 11:54 AM, [email protected] wrote:
Is glusterfs bug ? i want to know whether have some way to avoid this split-brain?
Please explore client quorum and server quorum options in gluster.
#gluster volume set help|grep quorum


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[email protected]

    *From:* Roman <mailto:[email protected]>
    *Date:* 2014-08-08 14:16
    *To:* [email protected] <mailto:[email protected]>
    *CC:* gluster-users <mailto:[email protected]>
    *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 [email protected] <mailto:[email protected]>
    <[email protected] <mailto:[email protected]>>:

        Yes, I do not wait for synchronization to complete.

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        [email protected] <mailto:[email protected]>

            *From:* Roman <mailto:[email protected]>
            *Date:* 2014-08-08 13:53
            *To:* [email protected] <mailto:[email protected]>
            *CC:* gluster-users <mailto:[email protected]>
            *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 [email protected]
            <mailto:[email protected]> <[email protected]
            <mailto:[email protected]>>:

                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

                
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                [email protected] <mailto:[email protected]>

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-- Best regards,
            Roman.




-- Best regards,
    Roman.



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