[Gluster-users] Gluster setup question

[Aleynikov, Serge]

Would the booster, writebehind or iothreads translators provide any help
in this setup to reduce potential blocking of the local client writer
due to NFS slowness? 


________________________________

	From: basavanagowda at gmail.com [mailto:basavanagowda at gmail.com]
On Behalf Of Basavanagowda Kanur
	Sent: Thursday, November 20, 2008 10:37 AM
	To: Aleynikov, Serge
	Cc: gluster-users at gluster.org
	Subject: Re: [Gluster-users] Gluster setup question
	
	


	On Thu, Nov 20, 2008 at 9:01 PM, Aleynikov, Serge
<Serge.Aleynikov at gs.com> wrote:
	

		I built it from glusterfs-1.3.12.tag.gz source.


	my replies in previous mail hold good. 
	
	

		


________________________________

			From: basavanagowda at gmail.com
[mailto:basavanagowda at gmail.com] On Behalf Of Basavanagowda Kanur
			Sent: Wednesday, November 19, 2008 10:50 PM
			To: Aleynikov, Serge
			Cc: gluster-users at gluster.org
			Subject: Re: [Gluster-users] Gluster setup
question
			
			
			Serge,
			  I am assuming you are not using source code
from repository.
			  If you are using source code directly from
repository, then answers below might not hold good. Please mention the
version, if you are using from source repository.
			
			
			On Thu, Nov 20, 2008 at 6:13 AM, Aleynikov,
Serge <Serge.Aleynikov at gs.com> wrote:
			

				Hi, 

				I am running several clients writing to
local disk that are setup to replicate data to N glusterfs server
processes that use NFS for storing this data.  I have the following
questions:

				1. Does every write of a process to a
local directory managed by glusterfs client involve syncronous
replication of data to glusterfs server?

			yes. it involves synchronous replication. 
			
			glusterfs--mailine--3.0--patch-621 (onwards) in
our source repository  has an AFR feature called quick-unwind, which
would make replication asychronous.
			
			

				

				2. Is it possible that if NFS is slow on
the glusterfs server side, then writing to local disk of a process on
the glusterfs client's machine would block?

			yes. fops on glusterfs will block.
			

				

				Thanks. 

				Serge 


	
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