Re: [MooseFS-Users] Chunkserver is also a client

[Aleksander W. <ale...@mo...>]

Hi,
All depends.

MooseFS has "prefer local" chunks mechanism but only under certain
conditions.
If number of IO operations on your local chunkserver is low, you will
get chunks only from local machine.
In case of higher number IO operations on your local chunkserver, chunks
will be copied from other chunkservers.

Best regards
Aleksander Wieliczko
Technical Support Engineer
MooseFS.com <moosefs.com>

On 05/04/2016 04:49 AM, Michael Tinsay wrote:
> Hi.
>
> I've been meaning to ask this for some time now.
>
> My current setup now is MooseFS 2.x with 1 Master, 1 Metalogger, 3
> Chunkservers, and all files have copies=3 so that all chunkservers
> will each have a complete set of chunks.  There are >5 clients
> connecting to this setup.
>
> Now, suppose that in one of the chunkservers, I mount mfs' root
> directory and start copying files to an external USB hard drive.
>
> My question is: will the chunkserver retrieve chunks from the other
> chunkservers for the files I'm copying?  Or does the mfs client code
> contain logic to determine that the chunks needed are available
> locally and, thus, all chunks are read locally which would in theory
> make the copying process go as fast as it could.
>
>
> --- mike t.
>
>
> ------------------------------------------------------------------------------
> Find and fix application performance issues faster with Applications Manager
> Applications Manager provides deep performance insights into multiple tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
>
>
> _________________________________________
> moosefs-users mailing list
> moo...@li...
> https://lists.sourceforge.net/lists/listinfo/moosefs-users