What about something similar to drbd where the actual data being written to one disk node on server A is written to another on server B via TCP/IP as well? Heartbeat in this case would depend on drbd writing the data to both servers... Can this be accomplished with Solaris/AVS/ZFS?
Thanks, Ryan -----Original Message----- From: storage-discuss-boun...@opensolaris.org [mailto:storage-discuss-bounces at opensolaris.org] On Behalf Of Fredrich Maney Sent: Thursday, March 11, 2010 9:43 AM To: Anton Altaparmakov Cc: ha-clusters-discuss at opensolaris.org; Unix Support; storage-discuss at opensolaris.org Subject: Re: [storage-discuss] [ha-clusters-discuss] How to setup up highly available zfs file system replicated synchronously across two sites? In order for a filesystem (any filesystem on any OS) to failover between nodes, that filesystem needs to be on shared storage that is external to all nodes. This is because if the node that hosts the storage fails, i.e. has a system board failure, there is no way for the other node to see it. You are already doing this in your working example on Linux - the iSCSI LUNs are presented to both nodes in the cluster from whatever device is hosting the iSCSI LUNs. You just need to do the same thing thing on the Solaris side. However, remember that ZFS is not multi-initiator aware, so you can not mount the zpools on both nodes at once without disk corruption. You will probably want to wrap the service, ip and storage in a zone and fail that over all together instead of separately at the global zone level. Google is your friend. I'd suggest searching for "Solaris Cluster iSCSI zone". fpsm On Thu, Mar 11, 2010 at 9:18 AM, Anton Altaparmakov <aia21 at cam.ac.uk> wrote: > Hi, > > I have been trying to setup Solaris Storage AVS with Sun Cluster in the hope of having a ZFS file system replicated synchronously (via TCP/IP only) between two machines so that it is mounted on one machine read-write and if that machine fails it is mounted read-write on the other machine. > > I have been reading all sorts of documentation and man pages and experimenting but everything I have tried immediately asks for configuration of shared storage which we don't have as the two machines are only connected by TCP/IP. > > We have such a system running at the moment using Linux, iSCSI plus software raid for the replication and XFS as the file system and heartbeat v2 for the failover and that works well. ?We then have an NFS server which exports the XFS file system and the NFS server is migrated together with the service ip address and the XFS file system between the two nodes in the heartbeat cluster but I have now spent ages trying to figure out what to do with Sun Cluster and AVS to achieve the same and I am completely failing to do it. ?)-: > > Would someone, pretty please with sugar on top, point me at the documentation I am failing to find or alternatively giving me some pointers as to which commands it is I should be using? > > Thank you very much in advance! > > Best regards, > > ? ? ? ?Anton > -- > Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @) Unix > Support, Computing Service, University of Cambridge, CB2 3QH, UK Linux > NTFS maintainer, http://www.linux-ntfs.org/ > > _______________________________________________ > ha-clusters-discuss mailing list > ha-clusters-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/ha-clusters-discuss > _______________________________________________ storage-discuss mailing list storage-discuss at opensolaris.org http://mail.opensolaris.org/mailman/listinfo/storage-discuss
