On 09/27/2016 05:15 AM, ML Wong wrote:
Have anyone in the list who has tried copying file which is bigger
than the individual brick/replica size?
Test Scenario:
Distributed-Replicated volume, 2GB size, 2x2 = 4 bricks, 2 replicas
Each replica has 1GB
When i tried to copy file this volume, by both fuse, or nfs mount. i
get I/O error.
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg0-brick1 1017M 33M 985M 4% /data/brick1
/dev/mapper/vg0-brick2 1017M 109M 909M 11% /data/brick2
lbre-cloud-dev1:/sharevol1 2.0G 141M 1.9G 7% /sharevol1
[xxxxxx@cloud-dev1 ~]$ du -sh /var/tmp/ovirt-live-el7-3.6.2.iso
1.3G/var/tmp/ovirt-live-el7-3.6.2.iso
[melvinw@lbre-cloud-dev1 ~]$ sudo cp /var/tmp/ovirt-live-el7-3.6.2.iso
/sharevol1/
cp: error writing ‘/sharevol1/ovirt-live-el7-3.6.2.iso’: Input/output
error
cp: failed to extend ‘/sharevol1/ovirt-live-el7-3.6.2.iso’:
Input/output error
cp: failed to close ‘/sharevol1/ovirt-live-el7-3.6.2.iso’:
Input/output error
Does the mount log give you more information? It it was a disk full
issue, the error you would get is ENOSPC and not EIO. This looks like
something else.
I know, we have experts in this mailing list. And, i assume, this is a
common situation where many Gluster users may have encountered. The
worry i have what if you have a big VM file sitting on top of Gluster
volume ...?
It is recommended to use sharding
(http://blog.gluster.org/2015/12/introducing-shard-translator/) for VM
workloads to alleviate these kinds of issues.
-Ravi
Any insights will be much appreciated.
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