HI all, I have an httpd-2.2.3 server running on centos5.4 x86_64 I have a couple of nfs mounted subdirectories like so;xx.xx.xx.xx:imagesXXX on /var/www/html/images/imagesXXX type nfs4 (ro,soft,timeo=10,retrans=0,proto=tcp,intr,addr=xx.xx.xx.xx)
Every so often the nfs server goes away, this has been due to hardware failure, disk corruption, or human error.
However despite trying lots of different mount settings, including hard/soft nfs/nfs4, tcp/udp, various timeo/retrans, if the nfs server is down, then the nfs client blocks on the request for at least a minute - (even soft, timeo=0, retrans=0, intr)
As there is reasonable load on the server, very quickly all the available client connections are blocked on the nfs request, and performance goes bad.
Are there any strategies to isolate the /var/www/html/images/imagesXXX so apache does not wait for more than say 5 seconds for the filesystem to return?
(i don't want to make any system wide changes, say to tcp, apache or system IO settings, as apache is running perfectly well in all other regards)
Many thanks Tom # cat /etc/redhat-release CentOS release 5.4 (Final) # uname -aLinux serverXX 2.6.18-164.11.1.el5 #1 SMP Wed Jan 20 07:32:21 EST 2010 x86_64 x86_64 x86_64 GNU/Linux
# rpm -qa | grep httpd httpd-2.2.3-43.el5.centos --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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