[Gluster-users] GlusterFS Changing Hash of Large Files?

[Strahil]

I never thought that replica 4  is allowed optiion. I always thought that 3 copies is the maximum.

Best Regards,
Strahil NikolovOn Jul 27, 2019 16:30, Matthew Evans <runmatt at live.com> wrote:
>
> Hi Ravishankar - I figured out the issue. The 4th node was showing "online" under 'gluster peer status' as well as 'gluster volume status' - but 'gluster volume status' wasn't showing a TCP port for that 4th node. When I opened 49152 in firewalld and then re-copied the ISO, the hash didn't change.
>
> So, now I guess the question would be, why would having one malfunctioning node override 3 functioning nodes and cause a file to be altered? I wasn't performing the initial copy onto the malfunctioning node.
>
> matt at docker1:~$ sudo glusterfs --version
> glusterfs 6.3
>
> matt at docker1:~$ sudo gluster volume info
>
> Volume Name: swarm-vols
> Type: Replicate
> Volume ID: 0b51e6b3-786e-454e-8a16-89b47e94828a
> Status: Started
> Snapshot Count: 0
> Number of Bricks: 1 x 4 = 4
> Transport-type: tcp
> Bricks:
> Brick1: docker1:/gluster/data
> Brick2: docker2:/gluster/data
> Brick3: docker3:/gluster/data
> Brick4: docker4:/gluster/data
> Options Reconfigured:
> performance.client-io-threads: off
> nfs.disable: on
> transport.address-family: inet
> auth.allow: 10.5.22.*
>
> ________________________________
> From: Ravishankar N <ravishankar at redhat.com>
> Sent: Saturday, July 27, 2019 2:04 AM
> To: Matthew Evans <runmatt at live.com>; gluster-users at gluster.org <gluster-users at gluster.org>
> Subject: Re: [Gluster-users] GlusterFS Changing Hash of Large Files?
>  
>
>
> On 26/07/19 6:50 PM, Matthew Evans wrote:
>>
>> I've got a new glusterfs 4 node replica cluster running under CentOS 7.  All hosts are backed by SSD drives and are connected to a 1Gbps Ethernet network. 3 nodes are running on CentOS 7 under ESXi on the same physical host, 1 is running on CentOS 7 under Hyper-V. I use this for my docker swarm persistent storage and all seems to work well.
>>
>> Yesterday however, I copied a 4GB .ISO file to my volume for a friend to download. I noticed the SHA256 hash of the ISO was altered. I downloaded a fresh copy to my desktop, verified the hash, scp'd it to the local glusterfs host storage and again, re-verified the hash. The moment I copied it to my glusterfs volume, the file hash changed. When my friend downloaded the ISO, his hash matched changed hash.
>
> Can you provide the below details?
> - glusterfs version
>
> -`gluster volume info`
>
>
>>
>> I am new to glusterfs, having deployed this as my first cluster ever about a week ago. Can someone help me work through why this file
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