Take the 2-minute tour ×
Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

This is a question about a problematic interaction between Apache and Samba.

Our Linux server (on a private intranet) mounts a Windows share, which is physically thousands of miles away, and serves it via Apache. This lets our users view files on the share via HTTP rather than by file:// URLs. Sometimes, however, a single HTTP hit produces multiple Apache threads all accessing the same SMB file simultaneously for 10 minutes or more in the "Sending Reply" ("W") state. Apache's server-status page shows many identical threads like the following, which is 1434 seconds old, all with slightly different lifetimes (in the "SS" column):

Srv     PID     Acc          M   CPU   SS   Req   Conn   Child  Slot     Client         VHost       Request
33-1    28411   0/146/27463  W   9.20  1434 0     0.0    0.56   689.97   192.168.0.25   someserver  GET /share/foo/myfile.xlsx HTTP/1.1

Does anybody know why this happens and how we can prevent it? Is there a better way to accomplish our goal of HTTP connections to a Windows share?

Our /etc/fstab entry is:

//server//sharename /mnt/foo cifs ro,auto,credentials=/my/file,nosuid,nodev 0 0

The httpd.conf entry is:

Alias /share/foo "/mnt/foo"
<Directory "/mnt/foo">
    EnableSendfile Off
    Options Indexes MultiViews
    AllowOverride None
    Order allow,deny
    Allow from all
</Directory>

We are also seeing load spikes on this server, where load average jumps from normal (1.00) to 20.00 or higher, which might be attributable to this problem.

Thank you very much.

share|improve this question

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.