The with a RAM disk is that memory speed is rated in nano seconds where as hard disk speeds are rated in mili seconds. So if it is setup correctly, it seems to make a lot of sense that it greatly increase performance of the POST mod. However, I have not tried it. Thanks for the pennies !
Regards, DGo -----Original Message----- From: Steve Garrett [mailto:[EMAIL PROTECTED] Sent: Friday, April 02, 2004 12:52 PM To: inFusion Support List Subject: Re: [iMS] RAMDisk results Just thought I would add to this post. In another life, and some time ago, I explored Ramdisks in various configurations. In my results the bottom line was that it was the fastest method for disk IO bound applications, _as long as there is sufficient CPU bandwidth available_. In other words, the problem just spread elsewhere as now the CPU had to actually move memory around and could not make use of any DMA devices (directly). The _absolute_ best method for a RAM disk is an external device, that connects via Fibre or SCSI hi-bandwidth. This way, all of the I/Os can happen within the original Disk I/O subsystem. You end up with basically zero latency, and the I/O can happen via DMA access, while the CPU is doing other things. Downside was $$$$. If you google for "Solid state ram disk" you can find various products. An example is: http://www.superssd.com/products/ramsan-320/index.htm Please note that I HAVE NO INTEREST IN THIS COMPANY. I JUST GOOGLED... But they do claim 250,000 I/Os per second, with 3 GB/Sec of thruput. That is a lot of email... My $0.02, Steve At 07:34 AM 4/1/2004, Phillip Beazley wrote: >At 10:22 AM 4/1/2004, you wrote: > > >I installed and tested the RAMDisk mentioned in an earlier thread with > >disappointing results. I configured the RAMDisk to hold the POST spool > >directory. While I did see a slight performance increase for creating files > >with CFX_iMSMail, the net improvement in my overall sending speed was > >marginal. Also, after sending about 1 million emails my server locked-up > >with some odd memory related errors in the event log. I have removed the > >RAMDisk from my server. > > > >I have tried several approaches now to increase the rate at which iMS POST > >will send emails. No matter what I try, it seems like 23K-24K per hour is > >the limit. We would like to double this rate to around 50K/hour. Has anyone > >achieved this speed from a single server? If so, how? Note that we send > >unique emails that average about 15KB in size. We have no bandwidth > >restrictions. We have the full enterprise version (1024 threads). > >Were you logging to RAM as well? I don't have any specific thoughts on >this, I'm presumably entering this late and you've addressed any other >server-related performance issues. > > >-- >Phillip Beazley >Onvix -- Website Hosting, Development & E-commerce >Visit http://www.onvix.com/ or call 727-578-9600. > ==^======================================================= This list server is Powered by iMS "The Swiss Army Knife of Mail Servers" -------------------------------------------------------------------------------------- This list is provided as a free service. Although we will try to address issues in a timely manner, support via this list is not guaranteed. If you require expedited support then a support contract is required. Support may be purchased from http://www.coolfusion.com/commerce. Details regarding support options may be reviewed at: http://www.coolfusion.com/SupportOptions.cfm -------------------------------------------------------------------------------------- To leave this list please complete the form at http://www.coolfusion.com/Support/ Need an iMS Developer license? Sign up for a free license here: http://www.coolfusion.com/Developers/ List archives: http://www.mail-archive.com/infusion-email%40eoscape.com/ Note: You are subscribed as [EMAIL PROTECTED] ==^=======================================================
