Re: [vchkpw] NFS Clustering
Nicholas Harring wrote: If you haven't yet bought hardware for the NFS, NetApp makes this a snap with SnapMirror. I don't remember all of the ins and outs, but its perfect for situations like this, its very bandwidth efficient, and its got the same bullet-proof reliability their products are known for. We currently use a Solaris Enterprise 250, old, but stone cold reliable. I'll need something in the other NOC. I've not looked at NetAPP. Otherwise I'd think your SAN vendor should have some form of block level replication available. This is where I am headed. We are looking at SANiq (Lefthand Networks) which can do volume replication in realtime. I am thinking that a NFS server in each location, sharing a iSCSI volume, would be worth looking into. Let the SAN keep the two volumes in sync and let NFS handle the multiple access to the volume. Hope that helps, Absolutely, thanks. DAve Nick -Original Message- From: DAve [mailto:[EMAIL PROTECTED] Sent: Monday, January 29, 2007 3:59 PM To: vpopmail Subject: [vchkpw] NFS Clustering Good afternoon/evening/morning, We have been tasked with splitting our mail services between our two NOCs. We have ordered a 1GB fiber connection between both locations. We will be moving one of two mailgateways, two of four pop toasters, and one of two smtp servers to the second NOC. Both border routers will be BGP advertising the same IP range and each location will have hardware load balancing. I can easily setup replication for my MySQL backend, but my NFS mail store is another concern. Is anyone else working with this type of configuration? I've not yet looked into NFS clustering or what may be involved. (I will have a iSCSI based SAN available which will have nodes/modules in both geographical locations, which may help). Any advice on what methods/tools work well is appreciated. Thanks, DAve -- Three years now I've asked Google why they don't have a logo change for Memorial Day. Why do they choose to do logos for other non-international holidays, but nothing for Veterans? Maybe they forgot who made that choice possible.
RE: [vchkpw] NFS Clustering
Another option possibly is DRBD (http://www.drbd.org). Version 8 is nearing gold which will allow concurrent access to 2 block devices. Of course, I'm not entirely sure if this is a linux only solution and am only tossing it out as an option for those looking for a cheaper/free solution ;) t. -Original Message- From: DAve [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 30, 2007 5:49 AM To: vchkpw@inter7.com Subject: Re: [vchkpw] NFS Clustering Nicholas Harring wrote: If you haven't yet bought hardware for the NFS, NetApp makes this a snap with SnapMirror. I don't remember all of the ins and outs, but its perfect for situations like this, its very bandwidth efficient, and its got the same bullet-proof reliability their products are known for. We currently use a Solaris Enterprise 250, old, but stone cold reliable. I'll need something in the other NOC. I've not looked at NetAPP. Otherwise I'd think your SAN vendor should have some form of block level replication available. This is where I am headed. We are looking at SANiq (Lefthand Networks) which can do volume replication in realtime. I am thinking that a NFS server in each location, sharing a iSCSI volume, would be worth looking into. Let the SAN keep the two volumes in sync and let NFS handle the multiple access to the volume. Hope that helps, Absolutely, thanks. DAve Nick -Original Message- From: DAve [mailto:[EMAIL PROTECTED] Sent: Monday, January 29, 2007 3:59 PM To: vpopmail Subject: [vchkpw] NFS Clustering Good afternoon/evening/morning, We have been tasked with splitting our mail services between our two NOCs. We have ordered a 1GB fiber connection between both locations. We will be moving one of two mailgateways, two of four pop toasters, and one of two smtp servers to the second NOC. Both border routers will be BGP advertising the same IP range and each location will have hardware load balancing. I can easily setup replication for my MySQL backend, but my NFS mail store is another concern. Is anyone else working with this type of configuration? I've not yet looked into NFS clustering or what may be involved. (I will have a iSCSI based SAN available which will have nodes/modules in both geographical locations, which may help). Any advice on what methods/tools work well is appreciated. Thanks, DAve -- Three years now I've asked Google why they don't have a logo change for Memorial Day. Why do they choose to do logos for other non-international holidays, but nothing for Veterans? Maybe they forgot who made that choice possible.
RE: [vchkpw] Qmail with Simscan, SA and ClamAv
whats your incomming and out going sessions are u using spamc and a spamd ? if so r u running sufficient spamd clients for the qty of incoming... most mail we receive is proced calmav/spamassasin in under 5s with a box 50% your power... but id increase your ram by 2x... are u running rbls b4 the spam checks? kenneth gf brown ceo shadowplay.net -Original Message- From: Max Esquivel [mailto:[EMAIL PROTECTED] Sent: January 30, 2007 20:15 To: vchkpw@inter7.com Subject: [vchkpw] Qmail with Simscan, SA and ClamAv I have also posted this to vchkpw list: I have a server with qmail running some 600 email accounts over some 30 domains. I recently installed simscan, Spamassassin and ClamAv. It all works really well, but during peak hours (say 300 to 500k per sec inbound traffic) Thee server starts to bog down and progressively gets slower and slower until 120 connections are maxed out and the server starts rejecting smtp connections first and then pop connections. This is a new AMD 64 bit with 1Gig Ram running on Debian and running also Apache with php, mysql, and Horde webmail (with very very few hits per day). If I turn off simscan, situation returns to normal after a while. I have tried finding some documentation about how many users and traffic qmail with simscan, SA and Clam may handle, but it seems there is nothing out there other than very general stuff like many users, thousands of users Perhaps the problem is in my setup and some configuration for simscan, SA or clam that I have set/not set incorrectly, ot I have not realized this number of users and trafffic is just too much for one server. Any suggestions or links to appropriate docs will be most appreciated. Thanks! Max Esquivel
