Date: Fri, 13 Nov 1998 01:39:50 -0600 (CST) From: Jim Bryant <jbryant@unix.tfs.net> To: tech@scsr.com (Tech1) Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Detailed info on Fail-safe cluster for Freebsd/unixes Message-ID: <199811130739.BAA15765@unix.tfs.net> In-Reply-To: <19981113062046320.AAA205@ff.scsr.com> from Tech1 at "Nov 13, 98 10:20:21 am"
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i was asking for details. you gave a minimal management overview. i'm not going to spend $350 unless i know how it operates. please give details if you are going to give details. do you have a paper on this high-availability system that would give details? if so please post it. what commercial systems are you familiar with? i was asking generically for a comparison to commercial systems as only one of my questions. what is involved in package configuration? i also find it hard to believe that if a service fails, that the lv's can be dismounted and remounted on the failover machine in a thousandth of a sec. i assume that this requires dual paths to the drives? and to add new questions: what mirroring techniques do you use? also please answer my original questions. i am interested, if it is something usable. merely saying it can fail over says nothing. In reply: > The down time will actually be between 0.001 sec to 1 sec. How's sun fail > safe features like? May be i can add more things to it. > > ---------- > > From: Jim Bryant <jbryant@unix.tfs.net> > > To: Tech1 <tech@scsr.com> > > Cc: freebsd-hackers@freebsd.org > > Subject: Re: Detailed info on Fail-safe cluster for Freebsd/unixes > > Date: Thursday, November 12, 1998 9:30 PM > > > > In reply: > > > 2) If the primary server is detected down, the auxiliary will take > over > > > all off TCP/IP > > > communications/services for the primary while doing its own > regular > > > activity assigned. > > > Example:When prime server down, when ftp to the downed server will > end > > > you up in the aux server. > > > > okie dokie. > > > > i assume that the same MAC's and IP's will be used on the failover > machine? > > > > > 4) Highly portable to all other mordern unixes like sun,hp,dec,ibm, > > > unixware, sco etc. > > > > well... i won't give up Sun-HA, MC/ServiceGuard, etc.. yet. > > > > > 5) the down time is reduced virtually to 0, instead of hours/days. > > > > be very careful what you say here. since you are charging a price, i > > assume you will be held liable for extended downtime. > > > > > [snip] > > > > how are locks handled? what about proc sync? what about rollback? > > > > is there anything more that could actually be useful? > > > > how does your product compare to other commercial HA products? in > > both features and operation? > > > > what lvm do you use? jim -- All opinions expressed are mine, if you | "I will not be pushed, stamped, think otherwise, then go jump into turbid | briefed, debriefed, indexed, or radioactive waters and yell WAHOO !!! | numbered!" - #1, "The Prisoner" ------------------------------------------------------------------------------ Inet: jbryant@tfs.net AX.25: kc5vdj@wv0t.#neks.ks.usa.noam grid: EM28pw voice: KC5VDJ - 6 & 2 Meters AM/FM/SSB, 70cm FM. http://www.tfs.net/~jbryant ------------------------------------------------------------------------------ HF/6M/2M: IC-706-MkII, 2M: HTX-212, 2M: HTX-202, 70cm: HTX-404, Packet: KPC-3+ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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