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<DIV dir=ltr align=left><SPAN class=932213115-20112008><FONT face=Arial
color=#0000ff size=2>I built it from glusterfs-1.3.12.tag.gz
source.</FONT></SPAN></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> basavanagowda@gmail.com
[mailto:basavanagowda@gmail.com] <B>On Behalf Of </B>Basavanagowda
Kanur<BR><B>Sent:</B> Wednesday, November 19, 2008 10:50 PM<BR><B>To:</B>
Aleynikov, Serge<BR><B>Cc:</B> gluster-users@gluster.org<BR><B>Subject:</B>
Re: [Gluster-users] Gluster setup question<BR></FONT><BR></DIV>
<DIV></DIV>Serge,<BR> I am assuming you are not using source code from
repository.<BR> 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.<BR><BR>
<DIV class=gmail_quote>On Thu, Nov 20, 2008 at 6:13 AM, Aleynikov, Serge <SPAN
dir=ltr><<A
href="mailto:Serge.Aleynikov@gs.com">Serge.Aleynikov@gs.com</A>></SPAN>
wrote:<BR>
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<P><FONT face=Arial size=2>Hi,</FONT> </P>
<P><FONT face=Arial size=2>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:</FONT></P>
<P><FONT face=Arial size=2>1. Does every write of a process to a local
directory managed by glusterfs client involve syncronous replication of data
to glusterfs server?</FONT></P></DIV></BLOCKQUOTE>
<DIV>yes. it involves synchronous replication.
<BR><BR>glusterfs--mailine--3.0--patch-621 (onwards) in our source
repository has an AFR feature called quick-unwind, which would make
replication asychronous.<BR><BR></DIV>
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<P><FONT face=Arial size=2></FONT></P>
<P><FONT face=Arial size=2>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?</FONT></P></DIV></BLOCKQUOTE>
<DIV>yes. fops on glusterfs will block.<BR></DIV>
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<P><FONT face=Arial size=2></FONT></P>
<P><FONT face=Arial size=2>Thanks.</FONT> </P>
<P><FONT face=Arial size=2>Serge</FONT>
</P></DIV><BR>_______________________________________________<BR>Gluster-users
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clear=all><BR>-- <BR>gowda<BR></BLOCKQUOTE></BODY></HTML>