Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
One of the client sites that we setup we configured a matched set of VMWare servers. They had a need for a clustered Exchange server and a clustered SQL server. They also had a limited budget for what they wanted. Here is what we did. We setup VMWare on the two servers and created 3 virtual servers each. Node one was the linux-HA running DRBD and iscsi-target. Node two was Exchange and node three was the SQL server. Duplicated this on second environment. It works like a champ. Cost ~$5k for the two name brand servers, dual Xeons, 4gb ram and 250gb raid drives... So yes, it can be done on the same box and it can work great. I would recommend that you have the iscsi server running on the node that's not running everything else (otherwise disk performance becomes your issue). > -----Original Message----- > From: drbd-user-bounces at lists.linbit.com [mailto:drbd-user- > bounces at lists.linbit.com] On Behalf Of Michael Paesold > Sent: Wednesday, April 05, 2006 12:29 PM > To: Luciano Miguel Ferreira Rocha; drbd-user at lists.linbit.com; drbd- > user at linbit.com > Subject: Re: [DRBD-user] Sensible maximum number of drbd devices > > Luciano Miguel Ferreira Rocha wrote: > > Another option to consider is iSCSI. It would at least allow you to > > decouple drbd and xen. > > That's an option I thought about, too. Would you use iSCSI on a dedicated > server? Or can iSCSI server and client be on the same host? Otherwise that > would add much higher infrastructure costs. We are trying to build really > low cost clusters (from a hardware perspective at least). > > Unfortunately, iSCSI introduces even another overhead -- SCSI is not > really > a light-weight protocol. Another option would be gnbd, but that requires a > dedicated "SAN" server cluster, again. > > Best Regards, > Michael Paesold > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user