[Gluster-users] No space left on device (when there is actually lots of free space)

[Brandon Ooi]

Actually this is my biggest qualm about Gluster and is both it's greatest
weakness and greatest strength. It's great as cluster storage where storage
requirements don't change, but doesn't work well as just general storage. In
real life usage, storage requirements change and it's necessary to
add/remove heterogeneous storage nodes depending on business needs. There
currently isn't a working configuration of Gluster for this after the unify
translator was removed. The unify translator isn't scalable at the high-end
anyway.

It may just be a general design decision that prevents this because there's
no master node that can manage replication/rebalancing. If anybody knows a
good open-source solution please pipe up!

Brandon



On Mon, Apr 5, 2010 at 11:54 PM, Kali Hernandez <kali at thenetcircle.com>wrote:

>
>
> On 04/06/2010 02:32 PM, Amar Tumballi wrote:
>
>>
>>
>>  /usr/lib64/glusterfs/3.0.3/xlator/cluster/stripe.so(stripe_stack_unwind_inode_cbk+0x1aa)[0x7f49e0de19ba]
>>
>>  /usr/lib64/glusterfs/3.0.3/xlator/cluster/replicate.so(afr_mkdir_unwind+0x113)[0x7f49e0ffa4c3]
>>
>>  /usr/lib64/glusterfs/3.0.3/xlator/cluster/replicate.so(afr_mkdir_wind_cbk+0xbe)[0x7f49e0ffb1de]
>>
>>  /usr/lib64/glusterfs/3.0.3/xlator/protocol/client.so(client_mkdir_cbk+0x405)[0x7f49e1242d35]
>>
>>
>> I can see that you have used 'cluster/replicate' as subvolume of
>> 'cluster/stripe' in the volume file. This setup is not supported with
>> GlusterFS as of now. (Both RAID 10, or RAID 01 are not supported).
>>
>> Please use volume files generated by 'glusterfs-volgen' tool.
>>
>> Regards,
>> Amar
>>
>
>
> Well, to me it _does_ work, meaning I can see the paired and mirrored nodes
> are having all the same copies of the files, and the same disk usage. If one
> node goes down for some reason I can recover the info from the mirrored
> pair.
>
> The reason for this error seems to be related to what Krzysztof replied in
> this same thread.
>
> -Kali-
>
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