Da Chun schrieb: > > Thanks for sharing! Kurt. > > Yes. I have read the article you mentioned. But I also read another > one: > http://www.hastexo.com/resources/hints-and-kinks/turning-ceph-rbd-images-san-storage-devices. > It uses LIO, which is the current standard Linux kernel SCSI target.
That has a major disadvantage, which is, that you have to use the kernel rbd module, which is not feature equivalent to ceph userland code, at least in kernel-versions which are shipped with recent distributions. > > There is another doc in the ceph > site: http://ceph.com/w/index.php?title=ISCSI&redirect=no > <http://ceph.com/w/index.php?title=ISCSI&redirect=no> Quite outdated I think, last update nearly 3 years ago, I don't understand what the box in the middle should depict. > I don't quite understand how the multi path works here. Are the two > ISCSI targets on the same system or two different ones? > Has anybody tried this already? > Leen has illustrated that quite well. > ------------------ Original ------------------ > *From: * "Kurt Bauer"<[email protected]>; > *Date: * Tue, Jun 18, 2013 03:52 PM > *To: * "Da Chun"<[email protected]>; > *Cc: * "ceph-users"<[email protected]>; > *Subject: * Re: [ceph-users] ceph iscsi questions > > Hi, > > > Da Chun schrieb: >> Hi List, >> >> I want to deploy a ceph cluster with latest cuttlefish, and export it >> with iscsi interface to my applications. >> Some questions here: >> 1. Which Linux distro and release would you recommend? I used Ubuntu >> 13.04 for testing purpose before. > For the ceph-cluster or the "iSCSI-GW"? We use Ubuntu 12.04 LTS for > the cluster and the iSCSI-GW, but tested Debian wheezy as iSCSI-GW > too. Both work flawless. >> 2. Which iscsi target is better? LIO, SCST, or others? > Have you read > http://ceph.com/dev-notes/adding-support-for-rbd-to-stgt/ ? That's > what we do and it works without problems so far. > >> 3. The system for the iscsi target will be a single point of failure. >> How to eliminate it and make good use of ceph's nature of distribution? > That's a question we asked aourselves too. In theory one can set up 2 > iSCSI-GW and use multipath but what does that do to the cluster? Will > smth. break if 2 iSCSI targets use the same rbd image in the cluster? > Even if I use failover-mode only? > > Has someone already tried this and is willing to share their knowledge? > > Best regards, > Kurt > >> >> Thanks! >> _______________________________________________ >> ceph-users mailing list >> [email protected] >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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