Re: [Veritas-ha] vxfencing >2 nodes
We currently do not have I/O fencing implemented on the VCS Windows package. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, June 12, 2008 4:37 PM To: veritas-ha@mailman.eng.auburn.edu Subject: Re: [Veritas-ha] vxfencing >2 nodes Agreed. But is it even possible to run fencing on a w*dows system? /A --- Andreas Lundgren Technical Account Manager | Steria AB Karlsrov 2D, Box 544, SE-182 15 Danderyd, Sweden Mobile: +46-709-214381 Email: [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: - To: "Shashi Kanth Boddula" <[EMAIL PROTECTED]>, "Mayank Vasa" <[EMAIL PROTECTED]> From: "Jim Senicka" <[EMAIL PROTECTED]> Sent by: [EMAIL PROTECTED] Date: 2008-06-12 17:33 cc: veritas-ha@mailman.eng.auburn.edu Subject: Re: [Veritas-ha] vxfencing >2 nodes For any cluster larger than 1 node, I/O fencing is highly recommended to protect data integrity in the event of a split brain. 2 nodes is not in any way more resistant to split brain than 3 nodes or more. VCS does not use any form of quorum based membership (quorum has a number of it's own ugly issues), so there is no difference in how our membership works when you have 2, 3, or 32 nodes -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Shashi Kanth Boddula Sent: Thursday, June 12, 2008 7:30 AM To: Mayank Vasa Cc: veritas-ha@mailman.eng.auburn.edu Subject: Re: [Veritas-ha] vxfencing >2 nodes Ok, thanks for clarification. I have seen many clustering products documentation which says that fencing/quorum is optional/not_required for more than 2 node clusters, and they says that there is very very less chance of happening split brain condition for more than 2 node clusters. -- Shashi Mayank Vasa wrote: > Shashi: > > The number of nodes is not a decision making factor for fencing. For a > cluster greater than 2 nodes, fencing helps to protect your data in > the case of a split brain scenario. > > SFRAC requires fencing. It is not supported without it. > > Regards, > + Mayank > > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Shashi > Kanth Boddula > Sent: Wednesday, June 11, 2008 12:23 AM > To: veritas-ha@mailman.eng.auburn.edu > Subject: [Veritas-ha] vxfencing >2 nodes > > Is vxfencing required if we go for >=3 node cluster ? Or, vxfencing > is optional if we go for >=3 node cluster ? > > > I am going for 4-node VCS5 SFRAC, still vxfencing required for me ? , > does all VCS5 SFRAC modules work properly without vxfencing ? > > > > ___ > Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha > > ___ Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha ___ Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha This email originates from Steria AB, Box 544, SE-182 15 Danderyd, Sweden, +46 8 622 42 00, http://www.steria.se. This email and any attachments may contain confidential/intellectual property/copyright information and is only for the use of the addressee(s). You are prohibited from copying, forwarding, disclosing, saving or otherwise using it in any way if you are not the addressee(s) or responsible for delivery. If you receive this email by mistake, please advise the sender and cancel it immediately. Steria may monitor the content of emails within its network to ensure compliance with its policies and procedures. Any email is susceptible to alteration and its integrity cannot be assured. Steria shall not be liable if the message is altered, modified, falsified, or even edited. ___ Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha
Re: [Veritas-ha] vxfencing >2 nodes
Agreed. But is it even possible to run fencing on a w*dows system? /A---Andreas LundgrenTechnical Account Manager | Steria ABKarlsrov 2D, Box 544, SE-182 15 Danderyd, SwedenMobile: +46-709-214381Email: [EMAIL PROTECTED][EMAIL PROTECTED] wrote: -To: "Shashi Kanth Boddula" <[EMAIL PROTECTED]>, "Mayank Vasa" <[EMAIL PROTECTED]>From: "Jim Senicka" <[EMAIL PROTECTED]>Sent by: [EMAIL PROTECTED]Date: 2008-06-12 17:33cc: veritas-ha@mailman.eng.auburn.eduSubject: Re: [Veritas-ha] vxfencing >2 nodesFor any cluster larger than 1 node, I/O fencing is highly recommended toprotect data integrity in the event of a split brain.2 nodes is not in any way more resistant to split brain than 3 nodes ormore.VCS does not use any form of quorum based membership (quorum has anumber of it's own ugly issues), so there is no difference in how ourmembership works when you have 2, 3, or 32 nodes-Original Message-From: [EMAIL PROTECTED][mailto:[EMAIL PROTECTED]] On Behalf Of ShashiKanth BoddulaSent: Thursday, June 12, 2008 7:30 AMTo: Mayank VasaCc: veritas-ha@mailman.eng.auburn.eduSubject: Re: [Veritas-ha] vxfencing >2 nodesOk, thanks for clarification.I have seen many clustering products documentation which says thatfencing/quorum is optional/not_required for more than 2 node clusters,and they says that there is very very less chance of happening splitbrain condition for more than 2 node clusters.-- ShashiMayank Vasa wrote:> Shashi:>> The number of nodes is not a decision making factor for fencing. For a> cluster greater than 2 nodes, fencing helps to protect your data in > the case of a split brain scenario.>> SFRAC requires fencing. It is not supported without it.>> Regards,> + Mayank>>> -Original Message-> From: [EMAIL PROTECTED]> [mailto:[EMAIL PROTECTED]] On Behalf Of Shashi> Kanth Boddula> Sent: Wednesday, June 11, 2008 12:23 AM> To: veritas-ha@mailman.eng.auburn.edu> Subject: [Veritas-ha] vxfencing >2 nodes>> Is vxfencing required if we go for >=3 node cluster ? Or, vxfencing > is optional if we go for >=3 node cluster ?>>> I am going for 4-node VCS5 SFRAC, still vxfencing required for me ? , > does all VCS5 SFRAC modules work properly without vxfencing ? ___> Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha>> ___Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.eduhttp://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha___Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.eduhttp://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha This email originates from Steria AB, Box 544, SE-182 15 Danderyd, Sweden, +46 8 622 42 00, http://www.steria.se. This email and any attachments may contain confidential/intellectual property/copyright information and is only for the use of the addressee(s). You are prohibited from copying, forwarding, disclosing, saving or otherwise using it in any way if you are not the addressee(s) or responsible for delivery. If you receive this email by mistake, please advise the sender and cancel it immediately. Steria may monitor the content of emails within its network to ensure compliance with its policies and procedures. Any email is susceptible to alteration and its integrity cannot be assured. Steria shall not be liable if the message is altered, modified, falsified, or even edited. ___ Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha
Re: [Veritas-ha] vxfencing >2 nodes
For any cluster larger than 1 node, I/O fencing is highly recommended to protect data integrity in the event of a split brain. 2 nodes is not in any way more resistant to split brain than 3 nodes or more. VCS does not use any form of quorum based membership (quorum has a number of it's own ugly issues), so there is no difference in how our membership works when you have 2, 3, or 32 nodes -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Shashi Kanth Boddula Sent: Thursday, June 12, 2008 7:30 AM To: Mayank Vasa Cc: veritas-ha@mailman.eng.auburn.edu Subject: Re: [Veritas-ha] vxfencing >2 nodes Ok, thanks for clarification. I have seen many clustering products documentation which says that fencing/quorum is optional/not_required for more than 2 node clusters, and they says that there is very very less chance of happening split brain condition for more than 2 node clusters. -- Shashi Mayank Vasa wrote: > Shashi: > > The number of nodes is not a decision making factor for fencing. For a > cluster greater than 2 nodes, fencing helps to protect your data in > the case of a split brain scenario. > > SFRAC requires fencing. It is not supported without it. > > Regards, > + Mayank > > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Shashi > Kanth Boddula > Sent: Wednesday, June 11, 2008 12:23 AM > To: veritas-ha@mailman.eng.auburn.edu > Subject: [Veritas-ha] vxfencing >2 nodes > > Is vxfencing required if we go for >=3 node cluster ? Or, vxfencing > is optional if we go for >=3 node cluster ? > > > I am going for 4-node VCS5 SFRAC, still vxfencing required for me ? , > does all VCS5 SFRAC modules work properly without vxfencing ? > > > > ___ > Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha > > ___ Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha ___ Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha
Re: [Veritas-ha] vxfencing >2 nodes
Ok, thanks for clarification. I have seen many clustering products documentation which says that fencing/quorum is optional/not_required for more than 2 node clusters, and they says that there is very very less chance of happening split brain condition for more than 2 node clusters. -- Shashi Mayank Vasa wrote: > Shashi: > > The number of nodes is not a decision making factor for fencing. For a > cluster greater than 2 nodes, fencing helps to protect your data in the > case of a split brain scenario. > > SFRAC requires fencing. It is not supported without it. > > Regards, > + Mayank > > > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Shashi > Kanth Boddula > Sent: Wednesday, June 11, 2008 12:23 AM > To: veritas-ha@mailman.eng.auburn.edu > Subject: [Veritas-ha] vxfencing >2 nodes > > Is vxfencing required if we go for >=3 node cluster ? Or, vxfencing is > optional if we go for >=3 node cluster ? > > > I am going for 4-node VCS5 SFRAC, still vxfencing required for me ? , > does all VCS5 SFRAC modules work properly without vxfencing ? > > > > ___ > Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha > > ___ Veritas-ha maillist - Veritas-ha@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha
