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3 way mirror Can Disk mirroring/db snapshots replace the usage of taking database backups?
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I have another concern. You say Falconstor will make a snapshot every N minutes. Do you really want to have the server blocked even once an hour for the several minutes it will take to make the snapshot? Or are they claiming that the snapshots are nearly instantaneous? If so, how are they doing that? By blocking the DB, breaking some mirror, then unblocking the DB, and making a copy of the mirror offline? Where's your redundancy until the mirror is reestablished? Or is it a three way mirror? In that case you don't even need Falconstor, you can do the three way mirror yourself, _script_ the snapshots/external archives, and save a bundle of $$$! There have been IDS users doing that for years! Art S. Kagel Oninit JP, if your assumption is right that it uses an onmode -c block then you would have a recoverable/rollforwardable image.... IF anything goes wrong during the time the snapshot is taken.... then everybody waits till it is fixed... cuz the DB is blocked... this would appear to be no different than you yourself issuing the block/unblock commands... but if the auto-software (falconstor) introduced between the block/unblock goes haywire for any reason... well... there u are... blocked.. and so are your users.... it would be wise at the least to build some type of monitoring/page-out to DBAs in the process in the event there is a snag and a manual unblock is needed. (this falconstor should be able to page-out on that) if the software builds in a block/unblock... then it is still in your best interest to back up the DB logs via informix onbar because it will be onbar, not falconstor, restoring/rolling those logs forward. (same with RMAN i would guess) how big is your data_base_?... how is this software going to make your life any easier? what prevents you from _script_ing a block/split/unblock yourself today without this software?... is this software being pushed on you by management? i only have 2 brain cells, but i can't imagine any value in adding this to an IDS system. do they really really support IDS or is that only lip service because they want u to buy it for oracle and/or sqlserver or something?.... some, if not all of your questions should be posed to falconstor.... if they truly support informix, they should be able to answer your concerns. if they really want your business, they should help u set it up for free on a free test server to see the value.... i searched their web site for informix, it came up with 2 tiny references... one in legal smallprint and the other in a news article... but if you search for oracle or sql server on their site... .. sqlserver has 2 pages of references and oracle has 3 pages. so they really support informix? put the ball in their court to prove it... sorry... feeling critical today... Norma Jean
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The administrator has disabled public write access. |
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3 way mirror Can Disk mirroring/db snapshots replace the usage of taking database backups?
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so they really support informix? put the ball in their court to prove it... sorry... feeling critical today... Norma Jean
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The administrator has disabled public write access. |
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3 way mirror Can Disk mirroring/db snapshots replace the usage of taking database backups?
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I have another concern. You say Falconstor will make a snapshot every N minutes. Do you really want to have the server blocked even once an hour for the several minutes it will take to make the snapshot? Or are they claiming that the snapshots are nearly instantaneous? If so, how are they doing that? By blocking the DB, breaking some mirror, then unblocking the DB, and making a copy of the mirror offline? Where's your redundancy until the mirror is reestablished? Or is it a three way mirror? In that case you don't even need Falconstor, you can do the three way mirror yourself, _script_ the snapshots/external archives, and save a bundle of $$$! There have been IDS users doing that for years! Art S. Kagel Oninit JP, if your assumption is right that it uses an onmode -c block then you would have a recoverable/rollforwardable image.... IF anything goes wrong during the time the snapshot is taken.... then everybody waits till it is fixed... cuz the DB is blocked... this would appear to be no different than you yourself issuing the block/unblock commands... but if the auto-software (falconstor) introduced between the block/unblock goes haywire for any reason... well... there u are... blocked.. and so are your users.... it would be wise at the least to build some type of monitoring/page-out to DBAs in the process in the event there is a snag and a manual unblock is needed. (this falconstor should be able to page-out on that) if the software builds in a block/unblock... then it is still in your best interest to back up the DB logs via informix onbar because it will be onbar, not falconstor, restoring/rolling those logs forward. (same with RMAN i would guess) how big is your data_base_?... how is this software going to make your life any easier? what prevents you from _script_ing a block/split/unblock yourself today without this software?... is this software being pushed on you by management? i only have 2 brain cells, but i can't imagine any value in adding this to an IDS system. do they really really support IDS or is that only lip service because they want u to buy it for oracle and/or sqlserver or something?.... some, if not all of your questions should be posed to falconstor.... if they truly support informix, they should be able to answer your concerns. if they really want your business, they should help u set it up for free on a free test server to see the value.... i searched their web site for informix, it came up with 2 tiny references... one in legal smallprint and the other in a news article... but if you search for oracle or sql server on their site... .. sqlserver has 2 pages of references and oracle has 3 pages. so they really support informix? put the ball in their court to prove it... sorry... feeling critical today... Norma Jean
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The administrator has disabled public write access. |
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3 way mirror Can Disk mirroring/db snapshots replace the usage of taking database backups?
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Keep in mind again that if you are not running IDS 11.10 or later you will not be able to roll forward any logical logs after a restore. Why?
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The administrator has disabled public write access. |
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3 way mirror Can Disk mirroring/db snapshots replace the usage of taking database backups?
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I have another concern. You say Falconstor will make a snapshot every N minutes. Do you really want to have the server blocked even once an hour for the several minutes it will take to make the snapshot? Or are they claiming that the snapshots are nearly instantaneous? If so, how are they doing that? By blocking the DB, breaking some mirror, then unblocking the DB, and making a copy of the mirror offline? Where's your redundancy until the mirror is reestablished? Or is it a three way mirror? In that case you don't even need Falconstor, you can do the three way mirror yourself, _script_ the snapshots/external archives, and save a bundle of $$$! There have been IDS users doing that for years! Art S. Kagel Oninit JP, if your assumption is right that it uses an onmode -c block then you would have a recoverable/rollforwardable image.... IF anything goes wrong during the time the snapshot is taken.... then everybody waits till it is fixed... cuz the DB is blocked... this would appear to be no different than you yourself issuing the block/unblock commands... but if the auto-software (falconstor) introduced between the block/unblock goes haywire for any reason... well... there u are... blocked.. and so are your users.... it would be wise at the least to build some type of monitoring/page-out to DBAs in the process in the event there is a snag and a manual unblock is needed. (this falconstor should be able to page-out on that) if the software builds in a block/unblock... then it is still in your best interest to back up the DB logs via informix onbar because it will be onbar, not falconstor, restoring/rolling those logs forward. (same with RMAN i would guess) how big is your data_base_?... how is this software going to make your life any easier? what prevents you from _script_ing a block/split/unblock yourself today without this software?... is this software being pushed on you by management? i only have 2 brain cells, but i can't imagine any value in adding this to an IDS system. do they really really support IDS or is that only lip service because they want u to buy it for oracle and/or sqlserver or something?.... some, if not all of your questions should be posed to falconstor.... if they truly support informix, they should be able to answer your concerns. if they really want your business, they should help u set it up for free on a free test server to see the value.... i searched their web site for informix, it came up with 2 tiny references... one in legal smallprint and the other in a news article... but if you search for oracle or sql server on their site... .. sqlserver has 2 pages of references and oracle has 3 pages. so they really support informix? put the ball in their court to prove it... sorry... feeling critical today... Norma Jean
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The administrator has disabled public write access. |
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