[Gluster-users] Adding bricks to DHT

[Roland Rabben]

Can someone confirm if new files will be stored on the new bricks with this
option enabled, even if I don't create new directories?

If I understand the documentation correct, it will only help with reading
files.

Thanks,
Roland

2009/12/6 Deyan Chepishev <dchepishev at superhosting.bg>

> Hello Roland,
>
> I think you should consider the DHT option: lookup-unhashed
>
>
> http://gluster.com/community/documentation/index.php/Translators/cluster/distribute
>
>
> Please let us know if this does the job
>
> Regards,
> Deian
>
> Roland Rabben wrote:
>
>> My problem is that I can't change directory names without a lot of hassle.
>> We have a hashed directory structure in our application that we rely on
>> GlusterFS to store.
>>
>> Is there a way of copying files behind GlusterFS' back and have GlusterFS
>> pick up on the change with a self heal?
>>
>> It seems that a system designed for scalability should tolerate eh...
>> being
>> scaled...?
>>
>> Regards
>> Roland
>>
>> 2009/12/6 Vahriç Muhtaryan <vahric at doruk.net.tr>
>>
>>
>>
>>> One idea , docs said that you should create new directory. Could you
>>> create
>>> a new directory after add another server and copy files from old
>>> directory
>>> to new one, then everything will be distributed.
>>>
>>> I know that glusterfs do not have reallocation mechanism for distribute
>>> data to new added bricks for achive performance and capcity problem.
>>>
>>>
>>> *Now the question is what about adding a new server?
>>>
>>> Currently hash works based on directory level distribution. i.e, a given
>>> file's parent directory will have information of how the hash numbers are
>>> mapped to subvolumes. So, adding new node doesn't disturb any current
>>> setup
>>> as the files/dirs present already have its information preserved.
>>> Whatever
>>> new directory gets created, will start considering new volume for
>>> scheduling
>>> files.
>>>
>>> Regards
>>> Vahric
>>>
>>> -----Original Message-----
>>> From: gluster-users-bounces at gluster.org [mailto:
>>> gluster-users-bounces at gluster.org] On Behalf Of Roland Rabben
>>> Sent: Sunday, December 06, 2009 6:29 PM
>>> To: gluster-users at gluster.org
>>> Subject: [Gluster-users] Adding bricks to DHT
>>>
>>> Hi
>>> I have a GlusterFS DHT system that I need to expand in a few days.
>>> Reading
>>> up on the documentation it seems to me that adding bricks won't solve our
>>> problem because of how the hash works.
>>> I have a fairly static folder structure, but the number of files are
>>> growing fast. From what I understand, adding bricks will not allow new
>>> files
>>> to be stored on the new bricks unless they are stored in new directories.
>>>
>>> So my questions are:
>>> 1. How can I make sure the new bricks are used?
>>> 2. Is there a way to "rebalance" content over the new and old bricks?
>>>
>>> I can't tolerate much downtime on my FS.
>>>
>>> I am using GlusterFS 2.06.
>>>
>>> Regards
>>> Roland Rabben
>>>
>>>
>>>
>>>
>>
>>
>>  ------------------------------------------------------------------------
>>
>>
>> _______________________________________________
>> Gluster-users mailing list
>> Gluster-users at gluster.org
>> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
>>
>>
>
>


-- 
Roland Rabben
Founder & CEO Jotta AS
Cell: +47 90 85 85 39
Phone: +47 21 04 29 00
Email: roland at jotta.no