Re: What is Quorum device ? (not Oracle)
Sindary, I didn't see a reply from anyone else your question so I'll take a stab at it but I have very limited knowledge about this so don't take it as doctrine. A quorum device is a disk that is shared between clustered servers to keep cluster configuration information current. I also think it is dependent upon the servers O/S as to how it is implemented and if the quorum device can be used for user data or not. From Sun. quorum device A disk shared by two or more nodes that contributes votes used to establish a quorum for the cluster to run. The cluster can operate only when a quorum of votes is available. The quorum device is used when a cluster becomes partitioned into separate sets of nodes to establish which set of nodes constitutes the new cluster. Cluster Members FAQ Is the order in which nodes are booted significant? In most cases, no. However, the boot order is important to prevent amnesia (refer to Quorum and Quorum Devices for details on amnesia). For example, if node two was the owner of the quorum device and node one is down, and then you bring node two down, you must bring up node two before bringing back node one. This prevents you from accidentally bringing up a node with out of date cluster configuration information. Take a look at this link for more in-depth information. http://docs.sun.com/ab2/coll.572.7/CLUSTCONCEPTS/@Ab2PageView/2025?DwebQuery=Quorum+OR+deviceoqt=Quorum+deviceAb2Lang=CAb2Enc=iso-8859-1 - Brian --- Sinardy Xing [EMAIL PROTECTED] wrote: Date: Thu, 07 Jun 2001 04:10:54 -0800 To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Reply-to: [EMAIL PROTECTED] From: Sinardy Xing [EMAIL PROTECTED] Subject: What is Quorum device ? (not Oracle) Organization: Fat City Network Services, San Diego, California Hi all, Can someone explain what is Quorum device, what it is the different from disk and quorum device ? Thank you, Sinardy __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Brian Wisniewski INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: What is Quorum device ? (not Oracle)
Hi Brian, Thank you so much for your information, you are really helpful. Sinardy -Original Message- Wisniewski Sent: Friday, 8 June 2001 8:17 PM To: Multiple recipients of list ORACLE-L Sindary, I didn't see a reply from anyone else your question so I'll take a stab at it but I have very limited knowledge about this so don't take it as doctrine. A quorum device is a disk that is shared between clustered servers to keep cluster configuration information current. I also think it is dependent upon the servers O/S as to how it is implemented and if the quorum device can be used for user data or not. From Sun. quorum device A disk shared by two or more nodes that contributes votes used to establish a quorum for the cluster to run. The cluster can operate only when a quorum of votes is available. The quorum device is used when a cluster becomes partitioned into separate sets of nodes to establish which set of nodes constitutes the new cluster. Cluster Members FAQ Is the order in which nodes are booted significant? In most cases, no. However, the boot order is important to prevent amnesia (refer to Quorum and Quorum Devices for details on amnesia). For example, if node two was the owner of the quorum device and node one is down, and then you bring node two down, you must bring up node two before bringing back node one. This prevents you from accidentally bringing up a node with out of date cluster configuration information. Take a look at this link for more in-depth information. http://docs.sun.com/ab2/coll.572.7/CLUSTCONCEPTS/@Ab2PageView/2025?DwebQuery =Quorum+OR+deviceoqt=Quorum+deviceAb2Lang=CAb2Enc=iso-8859-1 - Brian --- Sinardy Xing [EMAIL PROTECTED] wrote: Date: Thu, 07 Jun 2001 04:10:54 -0800 To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Reply-to: [EMAIL PROTECTED] From: Sinardy Xing [EMAIL PROTECTED] Subject: What is Quorum device ? (not Oracle) Organization: Fat City Network Services, San Diego, California Hi all, Can someone explain what is Quorum device, what it is the different from disk and quorum device ? Thank you, Sinardy __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Brian Wisniewski INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Sinardy Xing INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: What is Quorum device ? (not Oracle)
Same holds true... pretty much identical concept that is incase you are talking VMS on VAX or Alpha. Ken _ Clinical and Regulatory Informatics - Groton/New London Coordinator, Business and Technical Services Tel: (860) 732-0026Fax: (860) 715-8346 Email: [EMAIL PROTECTED] -Original Message- Sent: Friday, June 08, 2001 8:17 AM To: Multiple recipients of list ORACLE-L Sindary, I didn't see a reply from anyone else your question so I'll take a stab at it but I have very limited knowledge about this so don't take it as doctrine. A quorum device is a disk that is shared between clustered servers to keep cluster configuration information current. I also think it is dependent upon the servers O/S as to how it is implemented and if the quorum device can be used for user data or not. From Sun. quorum device A disk shared by two or more nodes that contributes votes used to establish a quorum for the cluster to run. The cluster can operate only when a quorum of votes is available. The quorum device is used when a cluster becomes partitioned into separate sets of nodes to establish which set of nodes constitutes the new cluster. Cluster Members FAQ Is the order in which nodes are booted significant? In most cases, no. However, the boot order is important to prevent amnesia (refer to Quorum and Quorum Devices for details on amnesia). For example, if node two was the owner of the quorum device and node one is down, and then you bring node two down, you must bring up node two before bringing back node one. This prevents you from accidentally bringing up a node with out of date cluster configuration information. Take a look at this link for more in-depth information. http://docs.sun.com/ab2/coll.572.7/CLUSTCONCEPTS/@Ab2PageView/2025?DwebQuery =Quorum+OR+deviceoqt=Quorum+deviceAb2Lang=CAb2Enc=iso-8859-1 - Brian --- Sinardy Xing [EMAIL PROTECTED] wrote: Date: Thu, 07 Jun 2001 04:10:54 -0800 To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Reply-to: [EMAIL PROTECTED] From: Sinardy Xing [EMAIL PROTECTED] Subject: What is Quorum device ? (not Oracle) Organization: Fat City Network Services, San Diego, California Hi all, Can someone explain what is Quorum device, what it is the different from disk and quorum device ? Thank you, Sinardy __ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Brian Wisniewski INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). LEGAL NOTICE Unless expressly stated otherwise, this message is confidential and may be privileged. It is intended for the addressee(s) only. Access to this E-mail by anyone else is unauthorized. If you are not an addressee, any disclosure or copying of the contents of this E-mail or any action taken (or not taken) in reliance on it is unauthorized and may be unlawful. If you are not an addressee, please inform the sender immediately. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Fowler, Kenneth R INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
