Comments on: Gathering CDP Info for My Tome on DR http://www.drunkendata.com/?p=2620 A blog for storage administrators and data managers. Fri, 23 Jul 2010 14:27:46 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: az990tony http://www.drunkendata.com/?p=2620&cpage=1#comment-19841 az990tony Tue, 24 Nov 2009 17:47:02 +0000 http://www.drunkendata.com/?p=2620#comment-19841 Hi Jon, Another bleg for more info? The FilesX product has been rename IBM Tivoli Storage Manager FastBack, including FastBack for Microsoft Exchange, and FastBack Bare Machine Recovery: http://www-01.ibm.com/software/tivoli/products/storage-mgr-fastback/ SAN Volume Controller offers Vdisk Mirroring, Metro Mirror and Global Mirror, comparable to EMC SRDF options: http://www.redbooks.ibm.com/Redbooks.nsf/RedbookAbstracts/sg247574.html IBM DS8000 series offers Metro Mirror, Global Mirror, and three-site Metro/Global Mirror: ftp://ftp.software.ibm.com/common/ssi/pm/sp/n/tss00241usen/TSS00241USEN.PDF http://www.redbooks.ibm.com/abstracts/sg246788.html http://www.redbooks.ibm.com/abstracts/sg246787.html Of course, our DS4000, DS5000, and N series have copy services: http://www.redbooks.ibm.com/abstracts/sg247591.html Let me know if you need anything else! Tony Pearson (IBM) Hi Jon,
Another bleg for more info?

The FilesX product has been rename IBM Tivoli Storage Manager FastBack, including FastBack for Microsoft Exchange, and FastBack Bare Machine Recovery:
http://www-01.ibm.com/software/tivoli/products/storage-mgr-fastback/

SAN Volume Controller offers Vdisk Mirroring, Metro Mirror and Global Mirror, comparable to EMC SRDF options:
http://www.redbooks.ibm.com/Redbooks.nsf/RedbookAbstracts/sg247574.html

IBM DS8000 series offers Metro Mirror, Global Mirror, and three-site Metro/Global Mirror:
ftp://ftp.software.ibm.com/common/ssi/pm/sp/n/tss00241usen/TSS00241USEN.PDF
http://www.redbooks.ibm.com/abstracts/sg246788.html
http://www.redbooks.ibm.com/abstracts/sg246787.html

Of course, our DS4000, DS5000, and N series have copy services:
http://www.redbooks.ibm.com/abstracts/sg247591.html

Let me know if you need anything else!

Tony Pearson (IBM)

]]> By: Administrator http://www.drunkendata.com/?p=2620&cpage=1#comment-19838 Administrator Fri, 20 Nov 2009 14:07:02 +0000 http://www.drunkendata.com/?p=2620#comment-19838 I agree with you, Ernst. CDP should mean something different, but the marketects are blending it with snapshots ("good enough"). I suspect this is because the CDP products introduced a few years back didn't resonate with consumers and didn't sell well into the headwinds created by the marketing pushback of vendors of traditional backup and on-array replication. The same holds true for so many technologies that were bandied about in the past decade. I agree with you, Ernst. CDP should mean something different, but the marketects are blending it with snapshots (“good enough”). I suspect this is because the CDP products introduced a few years back didn’t resonate with consumers and didn’t sell well into the headwinds created by the marketing pushback of vendors of traditional backup and on-array replication.

The same holds true for so many technologies that were bandied about in the past decade.

]]> By: Ernst Lopes Cardozo http://www.drunkendata.com/?p=2620&cpage=1#comment-19823 Ernst Lopes Cardozo Sun, 15 Nov 2009 23:15:21 +0000 http://www.drunkendata.com/?p=2620#comment-19823 Jon, I am, again, baffled by the storage industries ability to mix up their terminology. Continuous Data Protection, like the words say, would indicate that data is _always_ protected, not once a day, once a hour or once a second. It makes data protection part of doing a transaction. If the protection fails, the transaction fails. OK, call me purist, but I like to be able to look up words in a generic dictionary rather than have to consult a vendor-specific glossary. (Continuous: marked by uninterrupted extension in space, time, or sequence). I'm not saying that anybody needs CDP, just that the term should mean something different from Backup, Snapshots or (A)Synchronous replication. CDP is not replication, because CDP would allow me to undo a bad transaction or a data corruption by the application, malware or the OS, whereas the replication would faithfully corrupt the replica. So "on a routine basis" -> "on a continuous basis". It seems reasonable to distinguish three forms of CDP, each offering protection against a different set of threats: local CDP keeps the history on the same volume. If something happens to the volume, your data is still gone. Replicated CDP would store the history on a different volume/storage box, but in the same premise. Remote CDP would ship the history to a remote site, so that remote backup + history can restore your data up to the transaction where things went wrong. It is a transaction log of the storage layer, rather than the file system or database. If CDP just means “regular data protection”, what have we gained this century? Jon,

I am, again, baffled by the storage industries ability to mix up their terminology. Continuous Data Protection, like the words say, would indicate that data is _always_ protected, not once a day, once a hour or once a second. It makes data protection part of doing a transaction. If the protection fails, the transaction fails. OK, call me purist, but I like to be able to look up words in a generic dictionary rather than have to consult a vendor-specific glossary. (Continuous: marked by uninterrupted extension in space, time, or sequence). I’m not saying that anybody needs CDP, just that the term should mean something different from Backup, Snapshots or (A)Synchronous replication. CDP is not replication, because CDP would allow me to undo a bad transaction or a data corruption by the application, malware or the OS, whereas the replication would faithfully corrupt the replica.

So “on a routine basis” -> “on a continuous basis”.

It seems reasonable to distinguish three forms of CDP, each offering protection against a different set of threats: local CDP keeps the history on the same volume. If something happens to the volume, your data is still gone. Replicated CDP would store the history on a different volume/storage box, but in the same premise. Remote CDP would ship the history to a remote site, so that remote backup + history can restore your data up to the transaction where things went wrong. It is a transaction log of the storage layer, rather than the file system or database.

If CDP just means “regular data protection”, what have we gained this century?

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