RE: {bb} The bb_rename error problem

[<Erwin.Furth@postbankmail.nl>]

Title: Message

Brent,

 

Have you considered using RAM disks to increase performance? [bb]/www/html amd [bbvar]/logs are easily configured as tmpfs in /etc/vfstab. If you use a start/stop script in /etc/*.d you can add lines to preserve and restore these directories after stopping and before starting the BB server process using tar.

 

Hints (my bb server uses /opt/bb and /opt/bbvar):

swap    -       /opt/bb/www/html    tmpfs   -       yes     size=10M
swap    -       /opt/bbvar/logs        tmpfs   -       yes     size=10M

(You will probably want to increase the 10M)

#!/sbin/sh
BBDIR=/opt/bb
BBVAR=/opt/bbvar
BBUSER=bb
if [ -x $BBDIR/runbb.sh ]
then
        if [ "start" = "$1" ]
        then
                if [ -f $BBDIR/bbtmp.tar ]
                then
                        /usr/bin/tar xf $BBDIR/bbtmp.tar $BBDIR/www/html $BBVAR/logs
                fi
                /usr/bin/su - $BBUSER -c "cd $BBDIR;/usr/bin/nohup ./runbb.sh start"
        else
                /usr/bin/su - $BBUSER -c "cd $BBDIR;./runbb.sh stop"
                /usr/bin/tar cf $BBDIR/bbtmp.tar $BBDIR/www/html $BBVAR/logs
        fi
fi

 

Hope this helps with reducing the disk i/o.

 

Erwin

 

 -----Original Message-----
From: owner-bb@bb4.com [mailto:owner-bb@bb4.com]On Behalf Of brent.mccrackin@bell.ca
Sent: Wednesday, 26 January, 2005 20:58
To: bb@bb4.com
Subject: {bb} The bb_rename error problem

I have a very large and very busy BB server, and notice a lot of bb_rename errors logged to BBOUT where new status logs are unable to be renamed, with an errno 2 message.

 

Wed Jan 26 08:56:23 2005 bbd bb_rename Could not rename /bbvar/logs/.somehost.http to /bbvar/logs/somehost.http - errno: 2

 

I've looked through the list archives, and suggestions have been that this is a result of a host appearing multiple times in the BB-HOSTS file either on the server or the client.  This is most definitley not the case for me.

 

The root cause of the problem is high I/O wait times on the disks where the logs are stored, with the affected disks running at a fairly constant 80% to 90% busy.  This can be alleviated with faster disks, higher I/O bandwidth, and separating the BBVAR directory across multiple filesystems.

...

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