RE: Double Take and Oracle
I'm always dubious of these types of products (especially when there are no reference sites available) and would opt for a batched up standby database solution (syncing every 5/10/15 minutes or so) myself. I'm not saying Double-Take is not good - I've got no experience of it and am sorry it's not any help but you have an option should Double-Take not work correctly. Lewis Bishop --- Barclays Enable - ISS - E-NTRUST/Bexleyheath NT Oracle Database Consultant Watling Street, Bexleyheath, Kent, DA6 7RR (Mail Van R) Phone : 020 8298 3418 Mobile: 07950 380857 Email : [EMAIL PROTECTED] Enabling Competitive Advantage for Barclays in IT and Business Processing -Original Message- Sent: 15 October 2002 08:28 To: Multiple recipients of list ORACLE-L This header confirms that this email message has been swept for the presence of computer viruses. Corporate IT THE WOOLWICH -- Hello Esteemed Gurus Pls advise... We are trying to get Double Take to work on our site. Does anyone actually have this product working??? Salesperson claims Double Take is certified by Oracle - does anyone know? Where could I find out, other than the company itself? For those of you who don't know this product pls give your opinion. Double Take is a software that copies your database files and parameter files etc across to a disaster recovery machine, bit for bit. At failure of the production the recovery becomes the production system and starts up the database. Basicly the datafiles are still open?? We get the following error when we start up the database on the recovery system in tests: ORA-01172: recovery of thread 1 stuck at bloack 176624 of file 2. I would just like to add that when this happens we resync the databases and try again to test and guess what - it is the turn of file 3 to give the above error, and so back and forth we go. To say the very least I am frustrated beyond comprihension. To make this worse there is no one else in South Africa that uses this software with Oracle, apparently in France. Convienant - I'd say. So I have no one to turn to about this. (Apparently it works well with MSSQL). Anyone any ideas? The Enviroment is Windows 2K SP3. Oracle 817 Regards Denham Eva Oracle DBA UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity. Dennis Ritchie. DISCLAIMER This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. TFMC, its holding company, and any of its subsidiaries each reserve the right to monitor and manage all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be views of any such entity. This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Bishop Lewis INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - 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: Double Take and Oracle
Denham - I searched Oracle's site and could find no mention of Double Take. My guess is that they work successfully with SQL Server, but that has a different architecture that lends itself to being backed up without it being aware of it. I hope you haven't mailed that check yet. Dennis Williams DBA Lifetouch, Inc. [EMAIL PROTECTED] -Original Message- Sent: Tuesday, October 15, 2002 2:28 AM To: Multiple recipients of list ORACLE-L Hello Esteemed Gurus Pls advise... We are trying to get Double Take to work on our site. Does anyone actually have this product working??? Salesperson claims Double Take is certified by Oracle - does anyone know? Where could I find out, other than the company itself? For those of you who don't know this product pls give your opinion. Double Take is a software that copies your database files and parameter files etc across to a disaster recovery machine, bit for bit. At failure of the production the recovery becomes the production system and starts up the database. Basicly the datafiles are still open?? We get the following error when we start up the database on the recovery system in tests: ORA-01172: recovery of thread 1 stuck at bloack 176624 of file 2. I would just like to add that when this happens we resync the databases and try again to test and guess what - it is the turn of file 3 to give the above error, and so back and forth we go. To say the very least I am frustrated beyond comprihension. To make this worse there is no one else in South Africa that uses this software with Oracle, apparently in France. Convienant - I'd say. So I have no one to turn to about this. (Apparently it works well with MSSQL). Anyone any ideas? The Enviroment is Windows 2K SP3. Oracle 817 Regards Denham Eva Oracle DBA UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity. Dennis Ritchie. _ DISCLAIMER This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. TFMC, its holding company, and any of its subsidiaries each reserve the right to monitor and manage all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be views of any such entity. _ _ This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit http://www.marshalsoftware.com www.marshalsoftware.com _ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: DENNIS WILLIAMS INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - 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: RE: Double Take and Oracle
Title: RE: RE: Double Take and Oracle Thanks for the input so far. Double-Take works real time so the database is never down. I also followed their setup direction to the letter. Problem on our site is that this product is being used for SQL Server and Exchange (Appears to work fine there, but Oracle is a beast of another color compared to these Access on Steroids databases), management are insisting for the sake of conformity that this must work. At ever attempted startup another file gives an error, most frustrating of all is that there is almost no consistency to the errors. Denham Eva -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 15, 2002 4:04 PM To: Multiple recipients of list ORACLE-L Subject: Re:RE: Double Take and Oracle Lewis, I can understand where Eva is coming from. I had a demo of a similar product some time ago. Their BIG selling point is that you have a production server and a backup that is close in time with your production server at half (or less) the cost of a hot standby. Their reasoning is that you don't have Oracle running on the standby and consequently don't have to pay Oracle a license fee for the second server since only one server is running at any point in time. Logically their point is well taken. Regrettably and understandably that is NOT Oracle's point of view. Dick Goulet Reply Separator Author: Bishop Lewis [EMAIL PROTECTED] Date: 10/15/2002 2:23 AM I'm always dubious of these types of products (especially when there are no reference sites available) and would opt for a batched up standby database solution (syncing every 5/10/15 minutes or so) myself. I'm not saying Double-Take is not good - I've got no experience of it and am sorry it's not any help but you have an option should Double-Take not work correctly. Lewis Bishop --- Barclays Enable - ISS - E-NTRUST/Bexleyheath NT Oracle Database Consultant Watling Street, Bexleyheath, Kent, DA6 7RR (Mail Van R) Phone : 020 8298 3418 Mobile: 07950 380857 Email : [EMAIL PROTECTED] Enabling Competitive Advantage for Barclays in IT and Business Processing -Original Message- Sent: 15 October 2002 08:28 To: Multiple recipients of list ORACLE-L This header confirms that this email message has been swept for the presence of computer viruses. Corporate IT THE WOOLWICH -- Hello Esteemed Gurus Pls advise... We are trying to get Double Take to work on our site. Does anyone actually have this product working??? Salesperson claims Double Take is certified by Oracle - does anyone know? Where could I find out, other than the company itself? For those of you who don't know this product pls give your opinion. Double Take is a software that copies your database files and parameter files etc across to a disaster recovery machine, bit for bit. At failure of the production the recovery becomes the production system and starts up the database. Basicly the datafiles are still open?? We get the following error when we start up the database on the recovery system in tests: ORA-01172: recovery of thread 1 stuck at bloack 176624 of file 2. I would just like to add that when this happens we resync the databases and try again to test and guess what - it is the turn of file 3 to give the above error, and so back and forth we go. To say the very least I am frustrated beyond comprihension. To make this worse there is no one else in South Africa that uses this software with Oracle, apparently in France. Convienant - I'd say. So I have no one to turn to about this. (Apparently it works well with MSSQL). Anyone any ideas? The Enviroment is Windows 2K SP3. Oracle 817 Regards Denham Eva Oracle DBA UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity. Dennis Ritchie. DISCLAIMER This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. TFMC, its holding company, and any of its subsidiaries each reserve the right to monitor and manage all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be views of any such entity. This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com -- Please see the official ORACLE-L FAQ: http
RE: RE: Double Take and Oracle
Eva - just checking - from their docs have you verified that the transactional applications option is selected on the optimisations screen? This seems the most likely omission - and are you also sure that you are including all necessary files in the selected copy? Lewis Bishop --- Barclays Enable - ISS - E-NTRUST/Bexleyheath NT Oracle Database Consultant Watling Street, Bexleyheath, Kent, DA6 7RR (Mail Van R) Phone : 020 8298 3418 Mobile: 07950 380857 Email : [EMAIL PROTECTED] Enabling Competitive Advantage for Barclays in IT and Business Processing -Original Message- Sent: 15 October 2002 16:09 To: Multiple recipients of list ORACLE-L Thanks for the input so far. Double-Take works real time so the database is never down. I also followed their setup direction to the letter. Problem on our site is that this product is being used for SQL Server and Exchange (Appears to work fine there, but Oracle is a beast of another color compared to these Access on Steroids databases), management are insisting for the sake of conformity that this must work. At ever attempted startup another file gives an error, most frustrating of all is that there is almost no consistency to the errors. Denham Eva -Original Message- Sent: Tuesday, October 15, 2002 4:04 PM To: Multiple recipients of list ORACLE-L Lewis, I can understand where Eva is coming from. I had a demo of a similar product some time ago. Their BIG selling point is that you have a production server and a backup that is close in time with your production server at half (or less) the cost of a hot standby. Their reasoning is that you don't have Oracle running on the standby and consequently don't have to pay Oracle a license fee for the second server since only one server is running at any point in time. Logically their point is well taken. Regrettably and understandably that is NOT Oracle's point of view. Dick Goulet -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Bishop Lewis INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - 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:RE: RE: Double Take and Oracle
and guess what - it is the turn of file 3 to give the above error, and so back and forth we go. To say the very least I am frustrated beyond comprihension. To make this worse there is no one else in South Africa that uses this software with Oracle, apparently in France. Convienant - I'd say. So I have no one to turn to about this. (Apparently it works well with MSSQL). Anyone any ideas? The Enviroment is Windows 2K SP3. Oracle 817 Regards Denham Eva Oracle DBA UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity. Dennis Ritchie. DISCLAIMER This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. TFMC, its holding company, and any of its subsidiaries each reserve the right to monitor and manage all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be views of any such entity. This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Bishop Lewis INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - 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: INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - 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). _ DISCLAIMER This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. TFMC, its holding company, and any of its subsidiaries each reserve the right to monitor and manage all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be the views of any such entity. _ This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal For more information please visit www.marshalsoftware.com _ !DOCTYPE HTML PUBLIC -//W3C//DTD HTML 3.2//EN HTML HEAD META HTTP-EQUIV=Content-Type CONTENT=text/html; charset=iso-8859-1 META NAME=Generator CONTENT=MS Exchange Server version 5.5.2653.12 TITLERE: RE: Double Take and Oracle/TITLE /HEAD BODY PFONT SIZE=2Thanks for the input so far. Double-Take works real time so the database is never down./FONT BRFONT SIZE=2I also followed their setup direction to the letter. Problem on our site is that this product is being used for SQL Server and Exchange (Appears to work fine there, but Oracle is a beast of another color compared to these quot;Access on Steroidsquot; databases), management are insisting for the sake of conformity that this must work. At ever attempted startup another file gives an error, most
RE: RE: RE: Double Take and Oracle
Title: RE: RE: RE: Double Take and Oracle Dick, Thank you, atleast you have given me something to work with. I had already began making plans of approaching management for some serious downtime. I have been holding back as I am awaiting response from Double-Take's Source - Sunbelt Software on this issue, I have logged a call with them about 8hrs ago already! But you have given me alot to chew on until I do that - Many Thanks!!! -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 15, 2002 6:44 PM To: Multiple recipients of list ORACLE-L Subject: Re:RE: RE: Double Take and Oracle Eva, First things first, Oracle gets to be a bear when your trying to move a database as you are while it's running. The first point to settle is that Double Take is not doing something that is incompatible with Oracle, like making an ASCII vs. BINARY copy of the datafiles. To determine that you need to do a move with the source/production database shutdown. Yeah, I know that can be hard to schedule but it's necessary. If the copy won't start at that point then Double Take is completely incompatible with Oracle and you can't go much further. Now if that passes, allow Double Take to copy the production DB to the backup server and while it's doing so check the hotbackup status of the database using the following: SELECT COUNT(*) FROM DBA_DATA_FILES DF, SYS.V_$BACKUP B WHERE FILE_ID = FILE# AND DF.STATUS = 'AVAILABLE' AND B.STATUS = 'ACTIVE'; The number you get back should equal the number of datafiles in your database. If it comes back as 0 then the database has not switched and the backup is worthless. You may have to do this manually before running Double Take. Also your production/source DB has to be in archive log mode or else hotbackup does not work. The reasons for this are wrapped around Oracle's write as little as needed and do so as seldomly as possible idea. With this idea data block changes are not sent to the datafiles until there is a need to. MicroSlop and Exchange work on the exact opposite idea which makes them IO hogs, although Oracle can be the same. In your case I would suspect that the hotbackup is the problem. Dick Goulet Reply Separator Author: Denham Eva [EMAIL PROTECTED] Date: 10/15/2002 7:08 AM Thanks for the input so far. Double-Take works real time so the database is never down. I also followed their setup direction to the letter. Problem on our site is that this product is being used for SQL Server and Exchange (Appears to work fine there, but Oracle is a beast of another color compared to these Access on Steroids databases), management are insisting for the sake of conformity that this must work. At ever attempted startup another file gives an error, most frustrating of all is that there is almost no consistency to the errors. Denham Eva -Original Message- Sent: Tuesday, October 15, 2002 4:04 PM To: Multiple recipients of list ORACLE-L Lewis, I can understand where Eva is coming from. I had a demo of a similar product some time ago. Their BIG selling point is that you have a production server and a backup that is close in time with your production server at half (or less) the cost of a hot standby. Their reasoning is that you don't have Oracle running on the standby and consequently don't have to pay Oracle a license fee for the second server since only one server is running at any point in time. Logically their point is well taken. Regrettably and understandably that is NOT Oracle's point of view. Dick Goulet Reply Separator Author: Bishop Lewis [EMAIL PROTECTED] Date: 10/15/2002 2:23 AM I'm always dubious of these types of products (especially when there are no reference sites available) and would opt for a batched up standby database solution (syncing every 5/10/15 minutes or so) myself. I'm not saying Double-Take is not good - I've got no experience of it and am sorry it's not any help but you have an option should Double-Take not work correctly. Lewis Bishop --- Barclays Enable - ISS - E-NTRUST/Bexleyheath NT Oracle Database Consultant Watling Street, Bexleyheath, Kent, DA6 7RR (Mail Van R) Phone : 020 8298 3418 Mobile: 07950 380857 Email : [EMAIL PROTECTED] Enabling Competitive Advantage for Barclays in IT and Business Processing -Original Message- Sent: 15 October 2002 08:28 To: Multiple recipients of list ORACLE-L This header confirms that this email message has been swept for the presence of computer viruses. Corporate IT THE WOOLWICH -- Hello Esteemed Gurus Pls advise... We are trying to get Double Take to work on our site. Does anyone actually have this product working??? Salesperson claims Double Take is certified by Oracle - does anyone know? Where could I find out, other than the company itself? For those of you
RE: RE: Double Take and Oracle
Title: RE: RE: Double Take and Oracle Yes I believe that I have all the files necessary. The database does not complain about missing files but corrupt files ie the redolog etc. I'll have to check on the transactional applications options though, if you mean Oracle they are exact, but I'll take it up with the Double-Take techie. Thanks -Original Message- From: Bishop Lewis [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 15, 2002 6:35 PM To: Multiple recipients of list ORACLE-L Subject: RE: RE: Double Take and Oracle Eva - just checking - from their docs have you verified that the transactional applications option is selected on the optimisations screen? This seems the most likely omission - and are you also sure that you are including all necessary files in the selected copy? Lewis Bishop --- Barclays Enable - ISS - E-NTRUST/Bexleyheath NT Oracle Database Consultant Watling Street, Bexleyheath, Kent, DA6 7RR (Mail Van R) Phone : 020 8298 3418 Mobile: 07950 380857 Email : [EMAIL PROTECTED] Enabling Competitive Advantage for Barclays in IT and Business Processing -Original Message- Sent: 15 October 2002 16:09 To: Multiple recipients of list ORACLE-L Thanks for the input so far. Double-Take works real time so the database is never down. I also followed their setup direction to the letter. Problem on our site is that this product is being used for SQL Server and Exchange (Appears to work fine there, but Oracle is a beast of another color compared to these Access on Steroids databases), management are insisting for the sake of conformity that this must work. At ever attempted startup another file gives an error, most frustrating of all is that there is almost no consistency to the errors. Denham Eva -Original Message- Sent: Tuesday, October 15, 2002 4:04 PM To: Multiple recipients of list ORACLE-L Lewis, I can understand where Eva is coming from. I had a demo of a similar product some time ago. Their BIG selling point is that you have a production server and a backup that is close in time with your production server at half (or less) the cost of a hot standby. Their reasoning is that you don't have Oracle running on the standby and consequently don't have to pay Oracle a license fee for the second server since only one server is running at any point in time. Logically their point is well taken. Regrettably and understandably that is NOT Oracle's point of view. Dick Goulet -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Bishop Lewis INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services - 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). DISCLAIMER This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. TFMC, its holding company, and any of its subsidiaries each reserve the right to monitor and manage all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorized to state them to be views of any such entity. This e-mail message has been scanned for Viruses and Content and cleared by MailMarshal - For more information please visit www.marshalsoftware.com
RE: RE: RE: Double Take and Oracle
Title: RE: RE: RE: Double Take and Oracle A little clarification ---cut--- The reasons for this are wrapped around Oracle's write as little as needed and do so as seldomly as possible idea. ---end cut--- is not really true. When a tablespace is placed into hot backup mode, Oracle does not delay any writes to the datafiles. It continues to write to them like nothing changed. However, the major change (and performance hit) occurs because Oracle write more info to the redo logs. Instead of just writing the changes for that row to the redo log, it will now write the entire database block to the redo log. This is a reason why a lot of hot backup scripts, place only the tablespaces your are currently copying into hot backup mode. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, October 15, 2002 9:44 AM To: Multiple recipients of list ORACLE-L Subject: Re:RE: RE: Double Take and Oracle Eva, First things first, Oracle gets to be a bear when your trying to move a database as you are while it's running. The first point to settle is that Double Take is not doing something that is incompatible with Oracle, like making an ASCII vs. BINARY copy of the datafiles. To determine that you need to do a move with the source/production database shutdown. Yeah, I know that can be hard to schedule but it's necessary. If the copy won't start at that point then Double Take is completely incompatible with Oracle and you can't go much further. Now if that passes, allow Double Take to copy the production DB to the backup server and while it's doing so check the hotbackup status of the database using the following: SELECT COUNT(*) FROM DBA_DATA_FILES DF, SYS.V_$BACKUP B WHERE FILE_ID = FILE# AND DF.STATUS = 'AVAILABLE' AND B.STATUS = 'ACTIVE'; The number you get back should equal the number of datafiles in your database. If it comes back as 0 then the database has not switched and the backup is worthless. You may have to do this manually before running Double Take. Also your production/source DB has to be in archive log mode or else hotbackup does not work. The reasons for this are wrapped around Oracle's write as little as needed and do so as seldomly as possible idea. With this idea data block changes are not sent to the datafiles until there is a need to. MicroSlop and Exchange work on the exact opposite idea which makes them IO hogs, although Oracle can be the same. In your case I would suspect that the hotbackup is the problem. Dick Goulet Reply Separator Author: Denham Eva [EMAIL PROTECTED] Date: 10/15/2002 7:08 AM Thanks for the input so far. Double-Take works real time so the database is never down. I also followed their setup direction to the letter. Problem on our site is that this product is being used for SQL Server and Exchange (Appears to work fine there, but Oracle is a beast of another color compared to these Access on Steroids databases), management are insisting for the sake of conformity that this must work. At ever attempted startup another file gives an error, most frustrating of all is that there is almost no consistency to the errors. Denham Eva -Original Message- Sent: Tuesday, October 15, 2002 4:04 PM To: Multiple recipients of list ORACLE-L Lewis, I can understand where Eva is coming from. I had a demo of a similar product some time ago. Their BIG selling point is that you have a production server and a backup that is close in time with your production server at half (or less) the cost of a hot standby. Their reasoning is that you don't have Oracle running on the standby and consequently don't have to pay Oracle a license fee for the second server since only one server is running at any point in time. Logically their point is well taken. Regrettably and understandably that is NOT Oracle's point of view. Dick Goulet Reply Separator Author: Bishop Lewis [EMAIL PROTECTED] Date: 10/15/2002 2:23 AM I'm always dubious of these types of products (especially when there are no reference sites available) and would opt for a batched up standby database solution (syncing every 5/10/15 minutes or so) myself. I'm not saying Double-Take is not good - I've got no experience of it and am sorry it's not any help but you have an option should Double-Take not work correctly. Lewis Bishop --- Barclays Enable - ISS - E-NTRUST/Bexleyheath NT Oracle Database Consultant Watling Street, Bexleyheath, Kent, DA6 7RR (Mail Van R) Phone : 020 8298 3418 Mobile: 07950 380857 Email : [EMAIL PROTECTED] Enabling Competitive Advantage for Barclays in IT and Business Processing -Original Message- Sent: 15 October 2002 08:28 To: Multiple recipients of list ORACLE-L This header confirms that this email message has been swept for the presence of computer viruses. Corporate IT THE WOOLWICH
Re:RE: RE: RE: Double Take and Oracle
Eva, Your welcome. Please let all of us know how things work out for future reference. And don't be afraid to ask for more. Dick Goulet -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - 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).
