<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Jan 6, 2015, at 9:28 AM, Schweiss, Chip <<a href="mailto:chip@innovates.com" class="">chip@innovates.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote">On Tue, Jan 6, 2015 at 5:16 AM, Filip Marvan <span dir="ltr" class=""><<a href="mailto:filip.marvan@aira.cz" target="_blank" class="">filip.marvan@aira.cz</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="blue" vlink="purple" lang="CS" class=""><div class=""><p class="MsoNormal">Hi<u class=""></u><u class=""></u></p><p class="MsoNormal"><u class=""></u> <u class=""></u></p><p class="MsoNormal">as few guys before, I'm thinking again about High Availability storage with ZFS. I know, that there is great commercial RSF-1, but that's quite expensive for my needs.<u class=""></u><u class=""></u></p><p class="MsoNormal">I know, that Sašo did a great job about that on his blog <a href="http://zfs-create.blogspot.cz/" target="_blank" class="">http://zfs-create.blogspot.cz</a> but I never found the way, how to successfully configure that on current OmniOS versions.<u class=""></u><u class=""></u></p><p class="MsoNormal"><u class=""></u> <u class=""></u></p><p class="MsoNormal">So I'm thinking about something more simple. Arrange two LUNs from two OmniOS ZFS storages in one software mirror through fibrechannel. Arrange that mirror in client, for example mdadm in Linux. I know, that it will have performance affect and I will lost some ZFS advantages, but I still can use snapshots, backups with send/receive and some other interesting ZFS things, so it could be usable for some projects. <u class=""></u><u class=""></u></p><p class="MsoNormal">Is there anyone, who tried that before? Any eperience with that?</p></div></div></blockquote><div class=""><br class=""></div><div class="">While this sounds technically possible, it is not HA. Your client is the single point of failure. I would wager that mdadm would create more availability issues than it would be solving. <br class=""><br class=""></div><div class="">I run RSF-1 and HA is still hard to achieve. </div></div></div></div></div></blockquote><div><br class=""></div><div>HA: 98% perspiration, 2% good fortune :-)</div><div><br class=""></div><div>But seriously, providing HA services is much, much more than just running software.</div><div> -- richard</div><div><br class=""></div><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class="gmail_extra"><div class="gmail_quote"><div class="">I don't think I have gained any additional up-time overcoming failures, but it definitely helps with planned maintenance. Unfortunately, there are still too many ways a zfs pool can fail that having a second server connected does not help. <br class=""><br class=""></div><div class="">-Chip<br class=""></div><div class=""> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div link="blue" vlink="purple" lang="CS" class=""><div class=""><p class="MsoNormal"><u class=""></u><u class=""></u></p><p class="MsoNormal"><u class=""></u> <u class=""></u></p><p class="MsoNormal">Thank you,<span class="HOEnZb"><font color="#888888" class=""><u class=""></u><u class=""></u></font></span></p><span class="HOEnZb"><font color="#888888" class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p><p class="MsoNormal">Filip Marvan<u class=""></u><u class=""></u></p><p class="MsoNormal"><u class=""></u> <u class=""></u></p><p class="MsoNormal"><u class=""></u> <u class=""></u></p></font></span></div></div><br class="">_______________________________________________<br class=""> OmniOS-discuss mailing list<br class=""> <a href="mailto:OmniOS-discuss@lists.omniti.com" class="">OmniOS-discuss@lists.omniti.com</a><br class=""> <a href="http://lists.omniti.com/mailman/listinfo/omnios-discuss" target="_blank" class="">http://lists.omniti.com/mailman/listinfo/omnios-discuss</a><br class=""> <br class=""></blockquote></div><br class=""></div></div> _______________________________________________<br class="">OmniOS-discuss mailing list<br class=""><a href="mailto:OmniOS-discuss@lists.omniti.com" class="">OmniOS-discuss@lists.omniti.com</a><br class="">http://lists.omniti.com/mailman/listinfo/omnios-discuss<br class=""></div></blockquote></div><br class=""></body></html>