On Fri, 15 Oct 2004 20:08, Paul Dwerryhouse <[EMAIL PROTECTED]> wrote: > On Fri, Oct 15, 2004 at 06:56:21PM +1000, Russell Coker wrote: > > The machines were all running 2.4.2x last time I was there, but they > > may be moving to 2.6.x now. > > All the stores, relays and proxies are still on 2.4.x, but the LDAP > servers are now on 2.6.x (mainly because I could, not for any technical > reason. At the time I upgraded them I had enough redundancy to go around > that the downtime didn't affect anything).
In that case you should get the 4/4 kernel patch, it will make a huge improvement to your LDAP rebuild times which can come in handy in an emergency. From memory I had the slave machines rebuilding in about 15 minutes, I expect that I could get it down to 5 minutes with a 4/4 kernel, and less if the machine has 6G of RAM or more. For 4/4 the easiest thing to do is probably to get the Fedora kernel. > Four perdition/apache/imp servers now, rather than three. The webmail is > rather popular now, and three servers couldn't cut it on their own > anymore. Is there any way to optimise PHP for speed? Maybe PHP5 is worth trying? > Seven backend mailstores now, and I really want an eighth, but can't get > anyone to pay for it. I still think that using a umem device for journals is the right thing to do. You should be able to double performance by putting a umem device in each machine. It'll cost less than half as much as a new server to put a umem device in each machine, and give much more performance. I recall that none of those machines was even close to running out of disk space. You could probably handle the current load with 4 back-end machines if you used umem devices. -- http://www.coker.com.au/selinux/ My NSA Security Enhanced Linux packages http://www.coker.com.au/bonnie++/ Bonnie++ hard drive benchmark http://www.coker.com.au/postal/ Postal SMTP/POP benchmark http://www.coker.com.au/~russell/ My home page -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
