how to control tagged queueing?
I'm experimenting with the effects of SCSI tagged queueing on file system performance. Is there any kind of global toggle somewhere in the kernel to turn tagged queueing on and off, and/or knob to limit the number of outstanding tags? Tagged queue management all seems to be done at the device level, and I haven't found hooks for controlling it at a higher level (but I thought I'd ask before running off to write something). I'm running 4.6.2p4, in case things have changed. (If there's a nicer interface in 4.7, I'll install it immediately!) Thanks, -Dan To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-hackers in the body of the message
Re: how to control tagged queueing?
On Tue, 12 Nov 2002, Chris Dillon wrote: I'm experimenting with the effects of SCSI tagged queueing on file system performance. Is there any kind of global toggle somewhere in the kernel to turn tagged queueing on and off, and/or knob to limit the number of outstanding tags? Tagged queue management all seems to be done at the device level, and I haven't found hooks for controlling it at a higher level (but I thought I'd ask before running off to write something). I'm running 4.6.2p4, in case things have changed. (If there's a nicer interface in 4.7, I'll install it immediately!) man camcontrol Specifically: camcontrol tags [device id] [generic args] [-N tags] [-q] [-v] camcontrol negotiate [device id] [generic args] [-T enable|disable] Thanks, that's exactly what I needed. And thanks to the other people who have responded! -Dan To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-hackers in the body of the message
Re: gigabit NIC of choice?
On Fri, 6 Sep 2002, Terry Lambert wrote: Terry Lambert wrote: Dan Ellard wrote: What's the gigabit ethernet NIC of choice these days? (I've had good experiences with the NetGear G620T, but apparently this card is no longer being sold.) The Tigon II has the best performances, but that's because software people rewrote the firmware, instead of hardware engineers moonlighting as programmers. 8-) 8-). Is anyone still making cards with the Tigon II chipset? I'm not finding them for sale anywhere... Thanks, -Dan To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-hackers in the body of the message
gigabit NIC of choice?
What's the gigabit ethernet NIC of choice these days? (I've had good experiences with the NetGear G620T, but apparently this card is no longer being sold.) I'm looking for: - Easy FreeBSD integration. - Reliability. - High performance. Thanks, -Dan To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-hackers in the body of the message
Re: gigabit NIC of choice?
On Fri, 6 Sep 2002, Luigi Rizzo wrote: i have had good results with the single-port Intel em cards They are reasonably priced too, at least the copper version. Thanks for the note. (and thanks for reminding me that I meant to ask about copper! I hope to never deal with fiber again...) -Dan To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-hackers in the body of the message
again: FreeBSD NFS server benchmarks vs. OpenBSD, NetBSD?
There have been some useful responses to my original question, but I guess I didn't make it clear enough what the question was, because I got a lot of responses comparing the NFS servers on systems other than FreeBSD, NetBSD, and OpenBSD. I'm only interested in comparing the performance of these three systems (at least for the short run). If you've got a comparison of these three systems, or if someone has these systems running in-house and would be willing to benchmark them, I'd love to see the results! Thanks, -Dan To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-hackers in the body of the message
FreeBSD NFS server benchmarks vs. OpenBSD, NetBSD?
Has anyone done a side-by-side benchmark of the FreeBSD, OpenBSD, and NetBSD NFS servers on the same hardware? Note that I'm interested in server performance, not client performance. I'm particularly interested in read performance, but anything would be interesting. In lieu of actual data, which system do people think makes the best NFS server for heavily-loaded systems? Thanks, -Dan To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-hackers in the body of the message
Thanks! (Re: multi-disk file systems on FreeBSD?)
Thanks to everyone who responded to my query. It looks like vinum and/or ccd will do exactly what I want and they look very straightforward to configure. I probably could have discovered this myself (as several people pointed out), but I was blinded by my assumption that RAID implied redundancy-- so I didn't look at the RAID stuff at all. Now I know better. Thanks, -Dan To Unsubscribe: send mail to [EMAIL PROTECTED] with unsubscribe freebsd-hackers in the body of the message
