On Aug 10, 2009, at 2:29 PM, Carlos André wrote:
Bruce, no... you're right. I'm describing a situation where my server
died... i need mount fail faster (10 or 15 secs max) than 3 minutes
and 9 seconds...
The 189 second timeout is likely how long it takes the kernel to give
up trying to connect a TCP socket to the server (6 SYN attempts with
exponential retries, or something like that). For stock CentOS 5.3, I
think user space does only a DNS lookup for normal NFSv4 mounts -- the
kernel just tries to connect a TCP socket to port 2049, with no
preceding rpcbind request.
Carlos, let us know if you have replaced any NFS-related CentOS
components (kernel, nfs-utils) with something you've built yourself.
2009/8/7 J. Bruce Fields <bfields@xxxxxxxxxxxx>:
On Fri, Aug 07, 2009 at 09:42:18AM +0300, Benny Halevy wrote:
On Aug. 07, 2009, 3:18 +0300, Carlos André <candrecn@xxxxxxxxx>
wrote:
Anyone ?
2009/7/29 Carlos André <candrecn@xxxxxxxxx>:
PPL, I need put a CentOS 5.3 (updated) NFSv4 server to work with
Kerberos
and AutoFS, but i got a problem: If NFS server goes down i get a
LOOOOOOONG
mount timeout on CentOS 5.3 (updated) NFSv4 client...
Since i need mount some (3 to 6) dirs at user logon process, if
mount hangs,
user logon hangs. Then i want configure it to timeout (if server
down) after
10-15 secs (MAX) on each mount attempt.
I already make a lab and tried a LOT of combinations, there my
findings
(server DOWN IP: 172.16.0.10 / client IP: 172.16.1.10) using
basic command
(time mount 172.16.0.10:/remotedir /localdir/ -t nfs4 -o
sec=krb5,proto=<tcp/udp>) from NFS client:
- Once i try access mount point using AutoFS (proto=tcp OR
proto=udp) it
hangs for 189 secs (3m9s: real 3m9.001s) until show error
(mount: mount to
NFS server '172.16.0.10' failed: timed out (giving up))
Sounds like you're hitting the server's grace period.
I thought he was describing a situation where the server the server
is completely gone and isn't coming back, and wondering how to make
the
mount fail faster. But I may be misunderstanding.
--b.
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--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com
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