Re: [Moosefs-users] How many mfs clients can be supported by thesame master at the same time!!

[Thomas S H. <tha...@gm...>]

The last thing I want to do start a flame war, but I don't understand how
you are setting up your cloud infrastructure where a 2T vm image is a good
idea.

My initial impression is that there is something about the deployment that
would justify that kind of vm image.

If you need to access large amounts of data storage from a vm, then the vm
should mount the moosefs share, maintaining a virtual machine disk image of
that size is bad for performance (every write translates into large scale
chunk changes)

If you want to use a distributed file system for a cloud infrastructure (and
mooseFS is an excellent choice) then I am going to recommended that you
limit the writes to the virtual machine image, and offload as much as you
can to mounts of the master moosefs filesystem.

In my deployments I have all storage class file access on moosefs mounts and
it has greatly improved the performance of the filesystem and the virtual
machines.

-Tom Hatch

On Fri, Jan 14, 2011 at 10:19 PM, 颜秉珩 <rw...@12...> wrote:

>
> we use MFS to create virtual block device,
>
> A block device larger than 2T is much popular nowadays!
>
> So I think 2T limitation impacts the MFS application in this area
> (cloud storage environment)
>
>
>  ------------------------------
>  *发件人：* Michal Borychowski
> *发送时间：* 2010-12-30  15:25:39
> *收件人：* 'yanbh'
> *抄送：* 'moosefs-users'
> *主题：* Re: [Moosefs-users] How many mfs clients can be supported by thesame
> master at the same time!!
>
> Hi!
>
> *From:* yanbh [mailto:ya...@in...]
> *Sent:* Thursday, December 30, 2010 7:49 AM
> *To:* moosefs-users
> *Subject:* [Moosefs-users] How many mfs clients can be supported by the
> same master at the same time!!
>
>
>
> Dear all!
>
>
>
> I have some questions about MFS, as following!
>
> 1. how many mfsclient can  be supported by the same master server at the
> same time?
>
> what about 100 client mounting the same mfs master  at the same? what about
> the performace?
>
> *[MB] 100 clients would not be a problem. Performance should also not be
> affected (metadata in mfs master are kept in RAM for speed). Please have a
> look here:
> http://80.48.16.122/mfs.cgi?masterport=9421&mastername=bellona_main&sections=MSfor our installation.
> *
>
>
>
> 2. we know the mfs can only support a file whose size less than 2T, this is
> a bad limitation, when to remove it ?
>
> any plan?
>
> *[MB] Is it really a big problem for you? Can’t you divide the files to be
> not bigger than 2TB? For the moment removing this limiation doesn’t have big
> priority.*
>
> * *
>
>
>
> whatever, Thx for the developers giving us a execlent DFS!!
>
> *[MB] :)*
>
> * *
>
> *If you need any further assistance please let us know.*
>
> * *
>
> *Kind regards*
>
> *Micha?Borychowski *
>
> *MooseFS Support Manager*
>
> *_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _*
>
> *Gemius S.A.*
>
> *ul. Woska 7, 02-672 Warszawa*
>
> *Budynek MARS, klatka D*
>
> *Tel.: +4822 874-41-00*
>
> *Fax : +4822 874-41-01*
>
>
>
> Best
>
> Regards!
>
>
>
> 2010-12-30
>  ------------------------------
>
> *yanbh*
>
>
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