Re: [Gluster-devel] performance

[Chris Johnson]

On Tue, 6 Nov 2007, Kevan Benson wrote:

> 1) Stock fuse, or glusterfs patched fuse?  See 
> http://ftp.zresearch.com/pub/gluster/glusterfs/fuse/.  The Glusterfs team has 
> some changes to some default values in fuse to make it perform better for 
> common glusterfs scenarios, as well as a fix for locking, so you are better 
> off using the glusterfs supplied fuse if you want better performance and or 
> locking.

     Stock because I could get an RPM for it.

> 2) The read-ahead and write-behind translators are there to boost performance 
> for certain scenarios if you know the types of access your mount will be 
> doing much of the time.

     Serial reads and writes mostly.  Very little if any random stuff.

> 3) The real speed benefits arise when you are able to span reads across 
> multiple servers, increasing response and transfer rate.  This is where the 
> real benefits are (as well as redundancy), which NFS can't really compete 
> with (unless you're using Solaris).

     Striping?  I thought that was frowned upon.

> 4) That's a real close benchmark.  Are you sure the medium over which you are 
> transferring the data isn't maxed?  IB or TCP/IP?  100Mbit or 1000Mbit (and 
> server grade or workstation grade cards if gigabit).

     The servers are on gigabit.  It was a preliminary test.  I need
to do it over known gigabit on both ends.  That's next.

------------------------------------------------------------------------------- 
Chris Johnson               |Internet: address@hidden
Systems Administrator       |Web:      http://www.nmr.mgh.harvard.edu/~johnson
NMR Center                  |Voice:    617.726.0949
Mass. General Hospital      |FAX:      617.726.7422
149 (2301) 13th Street      |Man's a kind of missing link
Charlestown, MA., 02129 USA |fondly thinking he can think.  Piet Hein
-------------------------------------------------------------------------------