Michael - iSCSI on Gluster works well in theory and not so well in practice. When you create a new iSCSI device you have no way of knowing on what node of the Gluster cluster the file will actually be created on. In a replica environment the iSCSI layer makes it difficult to ensure synchronous writes. Thanks, Craig Gluster ----- Original Message ----- From: "Michael McGlothlin" <michaelm at plumbersstock.com> To: gluster-users at gluster.org Sent: Monday, April 4, 2011 1:13:21 PM Subject: Re: iSCSI? I have a 10Gb dedicated network for data storage. Do you think it'd still be a problem? Thanks, Michael McGlothlin On Mon, Apr 4, 2011 at 1:47 PM, R.C. <milanraf at gmail.com> wrote: > I don't think this would be a great idea. Not just for the iSCSI targets but > for ESXi datastore use. When a GlusterFS brick fails and resumes, replica > reconstruction (given you use it), will eat almost the whole available > bandwidth, making ESXi fail writing to virtual disks. > I had the same problem in my test environments. > > JM2C > > Raf > > > ----- Original Message ----- From: "Michael McGlothlin" > <michaelm at plumbersstock.com> > To: <gluster-users at gluster.org> > Sent: Monday, April 04, 2011 9:33 PM > Subject: iSCSI? > > >> Has anyone had any success using gluster as a backend for iSCSI >> targets? I want to create 1TB target files which will be shared by >> three iSCSI servers for access by ESXi. I am wondering how gluster >> handles updates to large files such as that - I assume it's smart >> enough to update only the changed blocks and not try to copy the >> entire file around on each update? Also wondering how well it will >> handle multiple servers accessing the same file at the same time. The >> same blocks, iSCSI files, should never be being written to from >> different servers at the same time but the target file would be. Will >> this work? Do I need to do anything special? >> >> >> Thanks, >> Michael McGlothlin >> _______________________________________________ >> Gluster-users mailing list >> Gluster-users at gluster.org >> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users >> > > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://gluster.org/cgi-bin/mailman/listinfo/gluster-users > _______________________________________________ Gluster-users mailing list Gluster-users at gluster.org http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
