Hello Eric, Saturday, December 23, 2006, 6:26:22 AM, you wrote:
EE> Hi all, EE> I'm currently investigating solutions for disaster recovery, and would EE> like to go with a zfs-based solution. From what I understand, there EE> are two possible methods of achieving this: an iscsi mirror over a WAN EE> link, and remote replication with incremental zfs send/recv. Due to EE> performance considerations with the former, I'm looking mostly at EE> incremental replication over set intervals. EE> My main question is: does anyone have experience doing this in EE> production? It looks good on html and man pages, but I would like to EE> know if there are any caveats I should be aware of. Various threads EE> I've read in the alias archives do not really seem to talk about EE> people's experiences with implementing it. Lately I've started to investigate it in a production. My first observation is that first full synchronization isn't that fast - at least on RAID-Z2. We'll see about incremental. Earlier tests are very promising for incremental synchronizations. Have you also looked at SNDR? Especially when it comes to Open Solaris next month. btw: I haven't looked at zfs send/recv code (yet) but it looks like zfs send is traversing meta-data - it probably would be much faster if it would send/read data linearly - perhaps upto some specified buffer size, I wouldn't mind to design 2GB of RAM just for replication if it would speed it up considerably. EE> Additionally, are there any plans for tools to facilitate such a EE> system? Something along the lines of a zfsreplicated service, which EE> could be more robust than a cron job? I don't know any. There's still open question for me - if I do 30 zfs sends in parallel or one-by-one the total time will be quicker with ...? I'll have to check it later. I'm also thinking about writing simple daemon which would make use of libzfs and send/recv streams between hosts instead of scripts and command line tools. But it's after I'll have first conclusions about send/recv approach. -- Best regards, Robert mailto:[EMAIL PROTECTED] http://milek.blogspot.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
