Date: Wed, 27 Apr 2011 17:09:23 +0300 From: Mikolaj Golub <trociny@freebsd.org> To: Denny Schierz <linuxmail@4lin.net> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: way for failover zpool (no HAST needed) Message-ID: <861v0nrdkc.fsf@in138.ua3> In-Reply-To: <1303905911.4232.86.camel@pcdenny> (Denny Schierz's message of "Wed, 27 Apr 2011 14:05:11 %2B0200") References: <1301397421.11113.250.camel@pcdenny> <86ipv1ll4f.fsf@kopusha.home.net> <1303905911.4232.86.camel@pcdenny>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, 27 Apr 2011 14:05:11 +0200 Denny Schierz wrote: DS> hi, DS> Am Dienstag, den 29.03.2011, 23:36 +0300 schrieb Mikolaj Golub: >> >> 2) There are complaints from watchdog. DS> what happens, if the watchdog isn't available and one or both nodes are DS> rebooting or something else? Without receiving complaints secondary wont switch to primary. This is done intentionally, so the node does not make decision on its own. But you can have several watchdogs if this really worries you. DS> the other thing what could happen: the connection between the host and DS> the SAS switch is death. DS> carp, ifstate and hastmon looking for the reachable IP, but not, if the DS> local storage is available. So I have a closer look to devd and zfs and hastmon isn't just looking if the IP reachable. watchdog connects to a cluster node and ask its status. So the result depends on how smart the script one use to get the status. DS> shutdown in case of problems the carp interface / or whole machine, to DS> force a switch. DS> cu denny -- Mikolaj Golub
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?861v0nrdkc.fsf>