Hello,
I install recently a DEC Ultimate - 2x533 Mhz processors - 2 Gbytes of RAM -
4.3 + 18 Gbytes of Ultra Wide SCSI disk under AdvFS, under Digital Unix 4.0d.
This machine is a CPU-intensive server and a NFS server for a cluster of Unix
boxes. It is connected to a 10 Mbs switch, like other Unix boxes.
Globally the NFS usage on the cluster is small and not intensive or frequent.
Since three days, I observe that when the machine makes a lot of swapping
(typically 2 or 3 jobs greater than 2.5 or 3 Gbytes of virtual memory), the NFS
services are **completely out**, nobody can telnet or rlogin any more.
ping is the only network service available.
The "black hole" keeps a few minutes (5, 10 or more) and the situation is
back. Later (a hour ?) a new black hole ..
Thanks for any idea !
Best regards,
Joel Marchand
remark : I will move in the future the NFS service on a dedicated Unix box, but
I would understand this problem. From my experience with others Unix (SunOS,
Solaris, Linux, AIX, Concentrix, Ultrix) I have never observed a so hard NFS
hangup, even with very busy servers.
-----
Laboratoire GAGE - Unite Mixte de Service MEDICIS
Ecole Polytechnique - 91128 PALAISEAU CEDEX - FRANCE
E-mail : Joel.Marchand_at_polytechnique.fr
Tel : +33 1 69 33 34 95 Fax : +33 1 69 33 30 50
WEB :
http://medicis.polytechnique.fr/gage/marchand.html
Received on Tue Jul 28 1998 - 16:32:07 NZST