Comments on: Configuring the LiteSpeed Engine for SQL Server http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/ Bringing you inside information about Quest Software's database management products. Thu, 27 May 2010 11:31:28 -0500 http://wordpress.org/?v=2.8.6 hourly 1 By: Brent Ozar http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/comment-page-1/#comment-365 Brent Ozar Thu, 28 Jan 2010 19:04:38 +0000 http://questkb.com/?p=210#comment-365 Andrew - hi, great question. It's completely different - we don't do NCS at all. Instead, we're using a file system filter driver. It's fully supported by Microsoft, and funny you mention it, one of our developers is at Microsoft this week testing an upcoming version with their help. Andrew – hi, great question. It’s completely different – we don’t do NCS at all. Instead, we’re using a file system filter driver. It’s fully supported by Microsoft, and funny you mention it, one of our developers is at Microsoft this week testing an upcoming version with their help.

]]> By: Andrew Calvett http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/comment-page-1/#comment-363 Andrew Calvett Tue, 26 Jan 2010 13:05:00 +0000 http://questkb.com/?p=210#comment-363 Hi, How does this functionality difer to Quest's previous product Native Command Substition (NCS)? My concern is around an issue that arose with NCS where by Microsoft still does not support the use of detours as per http://support.microsoft.com/kb/920925/en-us. So, are you achieving the functionality in a different way that is fully supported by Microsoft? Regards Andrew Hi,

How does this functionality difer to Quest’s previous product Native Command Substition (NCS)?

My concern is around an issue that arose with NCS where by Microsoft still does not support the use of detours as per http://support.microsoft.com/kb/920925/en-us.

So, are you achieving the functionality in a different way that is fully supported by Microsoft?

Regards

Andrew

]]> By: Brent Ozar http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/comment-page-1/#comment-356 Brent Ozar Mon, 18 Jan 2010 17:05:17 +0000 http://questkb.com/?p=210#comment-356 @SuperCoolMoss - yes, you can install it on log-shipped servers, but I would recommend this sequence: 1. Install the LiteSpeed Engine software on both servers 2. Configure the Engine to use a new backup extension (different than the one you're already using like BKP) 3. Change your log shipping plans to use the new extension That way you can restore both old and new backups without any changes. About the licensing - yes, you do have to purchase two licenses, but your salesperson might give you discounts on the second instance. @SuperCoolMoss – yes, you can install it on log-shipped servers, but I would recommend this sequence:
1. Install the LiteSpeed Engine software on both servers
2. Configure the Engine to use a new backup extension (different than the one you’re already using like BKP)
3. Change your log shipping plans to use the new extension

That way you can restore both old and new backups without any changes. About the licensing – yes, you do have to purchase two licenses, but your salesperson might give you discounts on the second instance.

]]> By: Brent Ozar http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/comment-page-1/#comment-355 Brent Ozar Mon, 18 Jan 2010 17:03:07 +0000 http://questkb.com/?p=210#comment-355 Balazs - only SQL Server 2008 Enterprise Edition has that feature, and since Enterprise costs roughly $25,000 per CPU, not everybody buys Enterprise. Marlon Ribunal did a comparison on his blog that might help: http://dbalink.wordpress.com/2010/01/14/sql-server-2008-backup-compression/ Balazs – only SQL Server 2008 Enterprise Edition has that feature, and since Enterprise costs roughly $25,000 per CPU, not everybody buys Enterprise. Marlon Ribunal did a comparison on his blog that might help:

http://dbalink.wordpress.com/2010/01/14/sql-server-2008-backup-compression/

]]> By: SuperCoolMoss http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/comment-page-1/#comment-353 SuperCoolMoss Thu, 14 Jan 2010 19:34:14 +0000 http://questkb.com/?p=210#comment-353 Hello Brent, Can you install this on a log-shipped pair of servers without having to interrupt log-shipping? And do you have to purchase two licenses if one of the log-shipping pair is dedicated DR server? Regards, SCM Hello Brent,

Can you install this on a log-shipped pair of servers without having to interrupt log-shipping? And do you have to purchase two licenses if one of the log-shipping pair is dedicated DR server?

Regards,

SCM

]]> By: Balazs Skublics http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/comment-page-1/#comment-350 Balazs Skublics Thu, 14 Jan 2010 10:13:48 +0000 http://questkb.com/?p=210#comment-350 Hi Brent, MSSQL 2008 has a built in backup compression feature. 3rd party tools are unable to use this feature. Do you have a comparison about compression rates of built-in MSSQL2008 feature and LightSpeed compressed backups? Microsoft made some measurements on his SAP ERP system, and published it in this blog: http://blogs.msdn.com/saponsqlserver/archive/2008/03/28/how-does-microsoft-perform-backups-in-their-sap-system-landscape.aspx Many thanks Balazs Hi Brent,

MSSQL 2008 has a built in backup compression feature.
3rd party tools are unable to use this feature. Do you have a comparison about compression rates of built-in MSSQL2008 feature and LightSpeed compressed backups?
Microsoft made some measurements on his SAP ERP system, and published it in this blog:
http://blogs.msdn.com/saponsqlserver/archive/2008/03/28/how-does-microsoft-perform-backups-in-their-sap-system-landscape.aspx

Many thanks
Balazs

]]> By: Brent Ozar http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/comment-page-1/#comment-347 Brent Ozar Wed, 13 Jan 2010 16:59:50 +0000 http://questkb.com/?p=210#comment-347 Steve - good questions. The compression is implemented at the server prior to its transmittal, before it's written to disk. We sort of stand between SQL Server and its file system so that when SQL Server writes a backup file, we're compressing it before those bits ever hit the network or the disks themselves. The same thing happens in reverse for restores - SQL Server requests bits off the disks, and we uncompress them in memory before handing them off to SQL Server. Therefore you'll need LiteSpeed in order to do the restore. Hope that helps! Let me know if you've got more questions. Steve – good questions. The compression is implemented at the server prior to its transmittal, before it’s written to disk. We sort of stand between SQL Server and its file system so that when SQL Server writes a backup file, we’re compressing it before those bits ever hit the network or the disks themselves. The same thing happens in reverse for restores – SQL Server requests bits off the disks, and we uncompress them in memory before handing them off to SQL Server. Therefore you’ll need LiteSpeed in order to do the restore.

Hope that helps! Let me know if you’ve got more questions.

]]> By: Steve Pendlebury http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/comment-page-1/#comment-344 Steve Pendlebury Tue, 12 Jan 2010 21:54:50 +0000 http://questkb.com/?p=210#comment-344 Nice video Brent! I have a few questions. 1. Is the compression implemented at the server prior to transmittal to its ultimate destination? For example, we back up to CIFS shares on the network; and we want to ensure bak file compression happens on the SQL Server PRIOR to it being transported across the network and then written to disk elswhere. 2. Once the backup has been compressed and written, how would a restore occur? And by that I mean does the same thing happen in reverse:- pull from network, decompression by the LiteSpeed engine driver on the SQL server, and then deposit at required location? Also with this in mind, I'm assuming we ould need an instance of this driver runing on any box we would anticipate restoring a database to in the future. Is this the case? Thanks a million, Steve Nice video Brent!
I have a few questions.
1. Is the compression implemented at the server prior to transmittal to its ultimate destination? For example, we back up to CIFS shares on the network; and we want to ensure bak file compression happens on the SQL Server PRIOR to it being transported across the network and then written to disk elswhere.
2. Once the backup has been compressed and written, how would a restore occur? And by that I mean does the same thing happen in reverse:- pull from network, decompression by the LiteSpeed engine driver on the SQL server, and then deposit at required location? Also with this in mind, I’m assuming we ould need an instance of this driver runing on any box we would anticipate restoring a database to in the future. Is this the case?

Thanks a million,
Steve

]]> By: Brent Ozar http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/comment-page-1/#comment-330 Brent Ozar Tue, 22 Dec 2009 18:35:51 +0000 http://questkb.com/?p=210#comment-330 That's an interesting question - I haven't used HyperBac's technology myself, so I can't say. That’s an interesting question – I haven’t used HyperBac’s technology myself, so I can’t say.

]]> By: Jeffrey Aven http://dbmanagement-blog.com/2009/12/22/configuring-the-litespeed-engine-for-sql-server/comment-page-1/#comment-329 Jeffrey Aven Tue, 22 Dec 2009 17:08:43 +0000 http://questkb.com/?p=210#comment-329 So is this a copy of what HyperBac has? So is this a copy of what HyperBac has?

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