Hi,
Here's some explain of this:
The 'wsize' and 'rsize' negotiated between client and server, are affected
by the auto-sized memory available to incoming request to NFS server.
And the size is actually adjusted based on total available memory to the server.
The problem is when the client negotiates a large size, and then the server
fails over to a lower limit. You are likely to get:
"RPC: fragment too large"
And the failing over fails ......
So the idea is to enforce an same configuration everywhere, regardless the
total memory available to the server.
I also re attach the patch for your consideration.
Thanks.
2009/7/27 Raoul Bhatia [IPAX] <r.bha...@ipax.at>:
> hi,
>
> in your patch, you add the following:
>
>> + if [ -w /proc/fs/nfsd/max_block_size ]; then
>> + echo 65536 > /proc/fs/nfsd/max_block_size
>> + fi
>
> why are you enforcing max_block_size to 65536?
> on my system (debian lenny) i get
>
>> # cat /proc/fs/nfsd/max_block_size
>> 262144
>
> please elaborate.
>
> cheers,
> raoul
> --
> ____________________________________________________________________
> DI (FH) Raoul Bhatia M.Sc. email. r.bha...@ipax.at
> Technischer Leiter
>
> IPAX - Aloy Bhatia Hava OEG web. http://www.ipax.at
> Barawitzkagasse 10/2/2/11 email. off...@ipax.at
> 1190 Wien tel. +43 1 3670030
> FN 277995t HG Wien fax. +43 1 3670030 15
> ____________________________________________________________________
> _______________________________________________________
> Linux-HA-Dev: Linux-HA-Dev@lists.linux-ha.org
> http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev
> Home Page: http://linux-ha.org/
>
Index: heartbeat/resources/OCF/nfsserver
===================================================================
--- heartbeat.orig/resources/OCF/nfsserver 2008-11-14 20:21:21.000000000 +0800
+++ heartbeat/resources/OCF/nfsserver 2009-07-28 14:34:44.000000000 +0800
@@ -73,6 +73,16 @@
<content type="string" default="*" />
</parameter>
+<parameter name="nfs_max_block_size" unique="0" required="1">
+<longdesc lang="en">
+Memory available for incoming requests. In bytes.
+</longdesc>
+<shortdesc lang="en">
+/proc/fs/nfsd/max_block_size
+</shortdesc>
+<content type="string" default="65536" />
+</parameter>
+
</parameters>
<actions>
@@ -173,6 +183,16 @@
rm -f /var/lib/nfs/sm.ha/* > /dev/null 2>&1
cp -f /var/lib/nfs/sm/* /var/lib/nfs/sm.ha > /dev/null 2>&1
+ ocf_log info "Preparing /proc/fs/nfsd first"
+ if [ ! -f /proc/fs/nfsd/max_block_size ] ; then
+ mount -t nfsd nfsd /proc/fs/nfsd
+ fi
+
+ if [ -w /proc/fs/nfsd/max_block_size ]; then
+ echo ${OCF_RESKEY_nfs_max_block_size} > /proc/fs/nfsd/max_block_size
+ fi
+
+
ocf_log info "Starting NFS server ..."
fn=`/bin/mktemp`
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