[Gluster-devel] more details about "No metadata dependencies" ??

[Yi Ling]

2009/7/31 Harald Stürzebecher <haralds at cs.tu-berlin.de>

> Hello!
>
> 2009/7/31 Yi Ling <lingyi.pro at gmail.com>:
> > there is a section about metadata on page
> http://www.gluster.com/news.php
> >
> > "No metadata dependencies - metadata management is frequently a source of
> > performance bottlenecks, particularly when there are a very large number
> of
> > files, and can be a single point of failure in traditional file systems.
> > GlusterFS eliminates this problem with intelligent data placement, an
> > automatic data distribution method that optimizes the use of resources
> and
> > eliminates metadata bottlenecks."
> >
> > yes,it's a advantage of GlusterFS. but yet i found no more detailed
> > information about the "intelligent data placement" "an automatic data
> > distribution methed". could anyone explain it in detail? and something
> about
> > file managemment~~~
>
> AFAIK, the GlusterFS metadata is stored as extended attributes to the
> files in the underlying filesystem.
>
> Hints can be found here:
>
>
> http://www.gluster.org/docs/index.php/Understanding_AFR_Translator#Locking_and_Change_Log
>
>
> http://www.gluster.org/docs/index.php/Setting_up_AFR_on_two_servers_with_pre-existing_data#Preparing_the_directories
>
>
> Harald Stürzebecher
>

thanks for replying~~ but im still confused~~~

in client, what's the routine of an operation like "create"/"read" ,from
client to server (even backend filesystem)?

"the GlusterFS metadata is stored as extended attributes to the files in the
underlying filesystem"
well, after storing, how could i read the file and how to know where the
file is located (or which server/brick the file is stored)
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