[Gluster-devel] Input/output error when files in .shard folder are deleted

[Pranith Kumar Karampuri]

+Krutika

On Mon, Oct 24, 2016 at 4:10 PM, qingwei wei <tchengwee at gmail.com> wrote:

> Hi,
>
> I am currently running a simple gluster setup using one server node
> with multiple disks. I realize that if i delete away all the .shard
> files in one replica in the backend, my application (dd) will report
> Input/Output error even though i have 3 replicas.
>
> My gluster version is 3.7.16
>
> gluster volume file
>
> Volume Name: testHeal
> Type: Replicate
> Volume ID: 26d16d7f-bc4f-44a6-a18b-eab780d80851
> Status: Started
> Number of Bricks: 1 x 3 = 3
> Transport-type: tcp
> Bricks:
> Brick1: 192.168.123.4:/mnt/sdb_mssd/testHeal2
> Brick2: 192.168.123.4:/mnt/sde_mssd/testHeal2
> Brick3: 192.168.123.4:/mnt/sdd_mssd/testHeal2
> Options Reconfigured:
> cluster.self-heal-daemon: on
> features.shard-block-size: 16MB
> features.shard: on
> performance.readdir-ahead: on
>
> dd error
>
> [root at fujitsu05 .shard]# dd of=/home/test if=/mnt/fuseMount/ddTest
> bs=16M count=20 oflag=direct
> dd: error reading ‘/mnt/fuseMount/ddTest’: Input/output error
> 1+0 records in
> 1+0 records out
> 16777216 bytes (17 MB) copied, 0.111038 s, 151 MB/s
>
> in the .shard folder where i deleted all the .shard file, i can see
> one .shard file is recreated
>
> getfattr -d -e hex -m.  9061198a-eb7e-45a2-93fb-eb396d1b2727.1
> # file: 9061198a-eb7e-45a2-93fb-eb396d1b2727.1
> trusted.afr.testHeal-client-0=0x000000010000000100000000
> trusted.afr.testHeal-client-2=0x000000010000000100000000
> trusted.gfid=0x41b653f7daa14627b1f91f9e8554ddde
>
> However, the gfid is not the same compare to the other replicas
>
> getfattr -d -e hex -m.  9061198a-eb7e-45a2-93fb-eb396d1b2727.1
> # file: 9061198a-eb7e-45a2-93fb-eb396d1b2727.1
> trusted.afr.dirty=0x000000000000000000000000
> trusted.afr.testHeal-client-1=0x000000000000000000000000
> trusted.bit-rot.version=0x0300000000000000580dde99000e5e5d
> trusted.gfid=0x9ee5c5eed7964a6cb9ac1a1419de5a40
>
> Is this consider a bug?
>
> Regards,
>
> Cwtan
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-- 
Pranith
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