http://www.unitek.com/training/netapp/blog Train. Certify. Succeed. Mon, 06 Apr 2009 22:30:06 +0000 http://wordpress.org/?v=2.7.1 en hourly 1 http://feedproxy.google.com/~r/UnitekNetappTrainingBlog/~3/9-W3FMEomKU/ http://www.unitek.com/training/netapp/blog/2009/04/data-ontap-and-space-management-%e2%80%93-part-8/#comments Mon, 06 Apr 2009 22:30:06 +0000 Unitek NetApp Blog http://www.unitek.com/training/netapp/blog/?p=82 Let’s take a look at the snap autodelete command.  We will begin by checking the autodelete status: The command: “snap autodelete vol1 show” returns the current status of the autodelete options for vol1. By default, autodelete is turned off, so let’s start by turning it on: It is now turned on.  The commitment option is set to try.  [...]<p>Post from: <a href="http://www.unitek.com/training/netapp/blog">Unitek NetApp Training Blog</a></p> Related posts brought to you by <a href='http://mitcho.com/code/yarpp/'>Yet Another Related Posts Plugin</a>.<img src="http://feeds.feedburner.com/~r/UnitekNetappTrainingBlog/~4/9-W3FMEomKU" height="1" width="1"/> http://www.unitek.com/training/netapp/blog/2009/04/data-ontap-and-space-management-%e2%80%93-part-8/feed/ http://www.unitek.com/training/netapp/blog/2009/04/data-ontap-and-space-management-%e2%80%93-part-8/ http://feedproxy.google.com/~r/UnitekNetappTrainingBlog/~3/O-hdI7PUrmI/ http://www.unitek.com/training/netapp/blog/2009/03/data-ontap-and-space-management-%e2%80%93-part-7/#comments Wed, 18 Mar 2009 19:37:25 +0000 Unitek NetApp Blog http://www.unitek.com/training/netapp/blog/?p=79 With the combination of Data ONTAP 7.2 and flexible volumes we have some new options for managing space in volumes that contain LUNs.  Obviously, we still have to provide a free block when the host wants to write, but now we have a new block pool in the aggregate we can pull from.  We also [...]<p>Post from: <a href="http://www.unitek.com/training/netapp/blog">Unitek NetApp Training Blog</a></p> Related posts brought to you by <a href='http://mitcho.com/code/yarpp/'>Yet Another Related Posts Plugin</a>.<img src="http://feeds.feedburner.com/~r/UnitekNetappTrainingBlog/~4/O-hdI7PUrmI" height="1" width="1"/> http://www.unitek.com/training/netapp/blog/2009/03/data-ontap-and-space-management-%e2%80%93-part-7/feed/ http://www.unitek.com/training/netapp/blog/2009/03/data-ontap-and-space-management-%e2%80%93-part-7/ http://feedproxy.google.com/~r/UnitekNetappTrainingBlog/~3/T-QDjQxuc5g/ http://www.unitek.com/training/netapp/blog/2009/03/space-management-and-data-ontap%e2%80%93-part-6/#comments Tue, 03 Mar 2009 23:04:25 +0000 Unitek NetApp Blog http://www.unitek.com/training/netapp/blog/?p=76 We have been looking at snapshot space management primarily from a NAS perspective.  From this perspective the primary technique used to deal with storage tied to the snapshots is the mechanism of the snapshot reserve.  And we have seen that all the snapshot reserve really does is set aside some space when the volume is [...]<p>Post from: <a href="http://www.unitek.com/training/netapp/blog">Unitek NetApp Training Blog</a></p> Related posts brought to you by <a href='http://mitcho.com/code/yarpp/'>Yet Another Related Posts Plugin</a>.<img src="http://feeds.feedburner.com/~r/UnitekNetappTrainingBlog/~4/T-QDjQxuc5g" height="1" width="1"/> http://www.unitek.com/training/netapp/blog/2009/03/space-management-and-data-ontap%e2%80%93-part-6/feed/ http://www.unitek.com/training/netapp/blog/2009/03/space-management-and-data-ontap%e2%80%93-part-6/ http://feedproxy.google.com/~r/UnitekNetappTrainingBlog/~3/kBqXiAlXBo8/ http://www.unitek.com/training/netapp/blog/2009/02/space-management-and-data-ontap%e2%80%93-part-5/#comments Tue, 17 Feb 2009 23:41:52 +0000 Unitek NetApp Blog http://www.unitek.com/training/netapp/blog/?p=73 Eventually, as more files are changed, more and more blocks will be assigned from the snapshot reserve.  The df –k command will show the amount of space being used within the active file system and in the .snapshot directory. There is nothing magical about the 20% number.  Sometimes we may want to decrease the percentage allocated [...]<p>Post from: <a href="http://www.unitek.com/training/netapp/blog">Unitek NetApp Training Blog</a></p> Related posts brought to you by <a href='http://mitcho.com/code/yarpp/'>Yet Another Related Posts Plugin</a>.<img src="http://feeds.feedburner.com/~r/UnitekNetappTrainingBlog/~4/kBqXiAlXBo8" height="1" width="1"/> http://www.unitek.com/training/netapp/blog/2009/02/space-management-and-data-ontap%e2%80%93-part-5/feed/ http://www.unitek.com/training/netapp/blog/2009/02/space-management-and-data-ontap%e2%80%93-part-5/ http://feedproxy.google.com/~r/UnitekNetappTrainingBlog/~3/zouacQ8Kkf0/ http://www.unitek.com/training/netapp/blog/2009/02/space-management-and-data-ontap%e2%80%93-part-4/#comments Tue, 03 Feb 2009 21:37:50 +0000 Unitek NetApp Blog http://www.unitek.com/training/netapp/blog/?p=70 We’ve been discussing how the WAFL file system allocates space for volumes, including the   meaning of space guarantees, space reservations and fractional reserve.  Now I’d like to look a little deeper at snapshots and space management from a snapshot perspective. Basically, when a snapshot occurs all the blocks associated with data in the volume are frozen.  [...]<p>Post from: <a href="http://www.unitek.com/training/netapp/blog">Unitek NetApp Training Blog</a></p> Related posts brought to you by <a href='http://mitcho.com/code/yarpp/'>Yet Another Related Posts Plugin</a>.<img src="http://feeds.feedburner.com/~r/UnitekNetappTrainingBlog/~4/zouacQ8Kkf0" height="1" width="1"/> http://www.unitek.com/training/netapp/blog/2009/02/space-management-and-data-ontap%e2%80%93-part-4/feed/ http://www.unitek.com/training/netapp/blog/2009/02/space-management-and-data-ontap%e2%80%93-part-4/ http://feedproxy.google.com/~r/UnitekNetappTrainingBlog/~3/13yRmrss_3o/ http://www.unitek.com/training/netapp/blog/2009/01/space-management-and-data-ontap-%e2%80%93-part-3/#comments Tue, 06 Jan 2009 22:30:16 +0000 Unitek NetApp Blog http://www.unitek.com/training/netapp/blog/?p=66 The next term I want to take a look at is fractional reserve.  This term is often misunderstood. Fractional reserve is applied to the space reserved blocks.  Without space reservations, fractional reserve has no meaning.  In the previous discussion, I described how space reservation is used to make sure there are enough free blocks in the [...]<p>Post from: <a href="http://www.unitek.com/training/netapp/blog">Unitek NetApp Training Blog</a></p> Related posts brought to you by <a href='http://mitcho.com/code/yarpp/'>Yet Another Related Posts Plugin</a>.<img src="http://feeds.feedburner.com/~r/UnitekNetappTrainingBlog/~4/13yRmrss_3o" height="1" width="1"/> http://www.unitek.com/training/netapp/blog/2009/01/space-management-and-data-ontap-%e2%80%93-part-3/feed/ http://www.unitek.com/training/netapp/blog/2009/01/space-management-and-data-ontap-%e2%80%93-part-3/ http://feedproxy.google.com/~r/UnitekNetappTrainingBlog/~3/L6P8rvKrCOU/ http://www.unitek.com/training/netapp/blog/2008/12/space-management-and-data-ontap%e2%80%93-part-two/#comments Wed, 10 Dec 2008 00:20:22 +0000 Unitek NetApp Blog http://www.unitek.com/training/netapp/blog/?p=65 The next topic I’d like to examine is space reservations.  Space reservation applies, not to volumes, but to files and LUNs.  In many ways, space reservations for files (and LUNs are a special case of a file) are very similar to space guarantees for volumes.  Volume space guarantees mean that space is set aside to support [...]<p>Post from: <a href="http://www.unitek.com/training/netapp/blog">Unitek NetApp Training Blog</a></p> Related posts brought to you by <a href='http://mitcho.com/code/yarpp/'>Yet Another Related Posts Plugin</a>.<img src="http://feeds.feedburner.com/~r/UnitekNetappTrainingBlog/~4/L6P8rvKrCOU" height="1" width="1"/> http://www.unitek.com/training/netapp/blog/2008/12/space-management-and-data-ontap%e2%80%93-part-two/feed/ http://www.unitek.com/training/netapp/blog/2008/12/space-management-and-data-ontap%e2%80%93-part-two/ http://feedproxy.google.com/~r/UnitekNetappTrainingBlog/~3/Ik8maryhMiE/ http://www.unitek.com/training/netapp/blog/2008/11/space-management-and-data-ontap%e2%80%93-part-one/#comments Wed, 26 Nov 2008 22:08:34 +0000 Unitek NetApp Blog http://www.unitek.com/training/netapp/blog/?p=64 The subject of space management always seems to generate some interesting discussions, particularly in my Data ONTAP Fundamentals class.  I think part of the reason for this is the terminology surrounding some of these concepts. The first concept I want to clarify is space guarantees as they apply to flexible volumes.  A flexible volume is actually [...]<p>Post from: <a href="http://www.unitek.com/training/netapp/blog">Unitek NetApp Training Blog</a></p> Related posts brought to you by <a href='http://mitcho.com/code/yarpp/'>Yet Another Related Posts Plugin</a>.<img src="http://feeds.feedburner.com/~r/UnitekNetappTrainingBlog/~4/Ik8maryhMiE" height="1" width="1"/> http://www.unitek.com/training/netapp/blog/2008/11/space-management-and-data-ontap%e2%80%93-part-one/feed/ http://www.unitek.com/training/netapp/blog/2008/11/space-management-and-data-ontap%e2%80%93-part-one/ http://feedproxy.google.com/~r/UnitekNetappTrainingBlog/~3/1ESg0LmONBs/ http://www.unitek.com/training/netapp/blog/2008/11/flash-drives-and-netapp/#comments Tue, 11 Nov 2008 23:04:02 +0000 Unitek NetApp Blog http://www.unitek.com/training/netapp/blog/?p=63 NetApp recently announced their direction on flash drives. The most interesting aspect of this was not just that they intend to support them, but that support will be implemented not just as plug in disk drives, but also as an extension of the WAFL cache. One of the problems with spinning disk drives as we [...]<p>Post from: <a href="http://www.unitek.com/training/netapp/blog">Unitek NetApp Training Blog</a></p> Related posts brought to you by <a href='http://mitcho.com/code/yarpp/'>Yet Another Related Posts Plugin</a>.<img src="http://feeds.feedburner.com/~r/UnitekNetappTrainingBlog/~4/1ESg0LmONBs" height="1" width="1"/> http://www.unitek.com/training/netapp/blog/2008/11/flash-drives-and-netapp/feed/ http://www.unitek.com/training/netapp/blog/2008/11/flash-drives-and-netapp/ http://feedproxy.google.com/~r/UnitekNetappTrainingBlog/~3/mCB5u-HZPSA/ http://www.unitek.com/training/netapp/blog/2008/10/qtrees-and-data-ontap-continued/#comments Wed, 29 Oct 2008 17:31:48 +0000 Unitek NetApp Blog http://www.unitek.com/training/netapp/blog/?p=58 Last time I began talking a little about qtrees. I described qtrees as a kind of mini volume or sub volume, because the have many of the qualities of a volume. Qtrees often seem to be a little controversial in class. Many people decide not to use them, not seeing any particular advantage, or [...]<p>Post from: <a href="http://www.unitek.com/training/netapp/blog">Unitek NetApp Training Blog</a></p> Related posts brought to you by <a href='http://mitcho.com/code/yarpp/'>Yet Another Related Posts Plugin</a>.<img src="http://feeds.feedburner.com/~r/UnitekNetappTrainingBlog/~4/mCB5u-HZPSA" height="1" width="1"/> http://www.unitek.com/training/netapp/blog/2008/10/qtrees-and-data-ontap-continued/feed/ http://www.unitek.com/training/netapp/blog/2008/10/qtrees-and-data-ontap-continued/