Gluster users - Jan 2015 - two questions regarding glusterfs cluster: tierd storage and hotspare brick

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2. As sata disks fails often(relatively, when you got lots of disks...), each
time a disk fails, i will have to manually replace the disks, and replace the
bricks;

Your disks should be part of a RAID set. (you choose the RAID level!)
If a disk fails, the RAID controller will keep the RAID running, and will
rebuild when a new disk is inserted.
Or you can have hot spare disks of course.

But yes - unless you have a robot arm in the server room you will have to
manually change the failed disks!




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Thanks John.
I got your idea, raid at OS/HW level; But that means you will have two
layer of duplication:
   Raid at HW level;
   And another replication at glusterfs level;
   Too much storage waste;

But anyway, yes, there is no such feature called spare disks in glusterfs
volume set;
Hope this is put into feature list :)

On Mon, Dec 29, 2014 at 7:10 PM, John Hearns <John.Hearns at viglen.co.uk>
wrote:
>
>  ------------------------------
>
>
>  2. As sata disks fails often(relatively, when you got lots of disks...),
> each time a disk fails, i will have to manually replace the disks, and
> replace the bricks;
>
>  Your disks should be part of a RAID set. (you choose the RAID level!)
> If a disk fails, the RAID controller will keep the RAID running, and will
> rebuild when a new disk is inserted.
> Or you can have hot spare disks of course.
>
>  But yes - unless you have a robot arm in the server room you will have
> to manually change the failed disks!
>
>
>
>
>
>
***********************************Viglen***********************************
> Viglen Ltd, Registered in England No 1208441. Registered Office: 7,
> Handley Page Way, Colney Street, St. Albans, Hertfordshire AL2 2DQ.
>
> Information in this electronic mail message is confidential and may be
> legally privileged. It is intended solely for the addressee. Access to this
> message by anyone else is unauthorised. If you are not the intended
> recipient any use, disclosure, copying or distribution of this message is
> prohibited and may be unlawful. When addressed to our customers, any
> information contained in this message is subject to Viglen Terms &
> Conditions. Please rely on your own virus checker and procedures with
> regard to any attachment to this message.
>
>
***********************************Viglen***********************************
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
> For more information please visit http://www.symanteccloud.com
> ______________________________________________________________________
>


-- 
Regards
Zhu Chao
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Thanks John.
I got your idea, raid at OS/HW level; But that means you will have two layer of
duplication:
   Raid at HW level;
   And another replication at glusterfs level;
   Too much storage waste;


I disagree with that remark.
Storage is cheap. You do not want to depend on reconstructing data from a
mirrored copy if you can have a reliable local copy.

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Information in this electronic mail message is confidential and may be legally
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