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		<title>Challenge with NetApp deduplication (ASIS)</title>
		<description>Discuss Challenge with NetApp deduplication (ASIS)</description>
		<link>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html</link>
		<lastBuildDate>Fri, 10 Feb 2012 20:56:38 +0000</lastBuildDate>
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			<title>Dang backup apps</title>
			<link>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-648</link>
			<description><![CDATA[You'd think they'd keep me updated on things like new features. ;-) Thanks for the update. I've updated the article to reflect the new information.]]></description>
			<dc:creator>W. Curtis Preston</dc:creator>
			<pubDate>Thu, 09 Jul 2009 14:20:47 +0000</pubDate>
			<guid>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-648</guid>
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			<title>ASIS &amp; SM2T additions &amp; comments</title>
			<link>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-647</link>
			<description><![CDATA[Hi Curtis, some additions, corrections and additional comments: SM2T can be done today by 6 backup software: TSM since 5.5.2 official supported (I have a very large german TSM customer, who replaced all NDMP DUMP by NDMP SM2T in February). BakBone, NBU, BakBone, CommVault, Atempo and SyncSort are also able to control it (hope more in future). SM2T is only a solution for Disaster backup2tape. But this is fine for everybody, who hold enough Snapshots for Single-File Restores. The benefit is, that every Snapshot is back at desaster restore (Customers do not like to loose any of their sometimes over 100 snapshots, whenever a restore has to be done for their secondary storage). The next great thing is: SM2T works with full speed for the million-of-file NAS-volume usecase (which is a speed problem for any file-level-backup). VolumeSnapMirror became very famous and recommended the last months for the Remote Office Backup use case: Customer stores their data on a NetApp filer (often a small FAS2020). They activate ASIS (Dedupe) for every volume and use snapshot for data protection. They do at night one ASIS run, followed by a Snapshot, followed by one VSM transfer. That gives them since OTNAP 7.3 the benefit, that the dedupe benefit can be kept for the WAN line and for the target filer in the Datacenter. BTW, some Customer had already added Network Compression (today under PVR) to reduce another 50% of WAN-traffic. But the best for this use case is: Every Restore at Reomote-Office can be done from local snapshots (no problem for big full volume restores over the WAN wire). The replicated data in the data center are only needed in case of disaster. All together, that's the perfect Remote Office Backup Solution. Do you know anything on the market that compares? Comparing different dedupe implementations and the benefit out of them, I expect, that many come in the future to the following conclusion: It makes most sense to begin with dedupe at primary storage and keep the benefit for every replication (on wire and target) and keep the benefit for any backup2tape. Avoiding duplication is better than to duplicate data with all the transport overhead (for example by doing file-level fullbackups) and to dedupe only at the end for the backup target (VTL or B2D-Diskcache). On a high level, that's the target, where NetApp want's to get.]]></description>
			<dc:creator>Dieter Unterseher</dc:creator>
			<pubDate>Thu, 09 Jul 2009 14:03:36 +0000</pubDate>
			<guid>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-647</guid>
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			<title>Srinath Alapati says:</title>
			<link>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-646</link>
			<description><![CDATA[Curtis, Nice to see you here. Its been a long time since we connected. I would like to comment on the following statement. Volume SnapMirror (VSM) is more popular with NetApp customers. VSM provides mirroring functionality and therefore a good fit for DR. For backups, many people prefer SnapVault, which is qtree-based replication. Maybe you meant to say many people prefer SnapVault for backup purposes? "However, many people prefer qtree snapmirror, so they should be aware of this limitation."]]></description>
			<dc:creator>Srinath Alapati</dc:creator>
			<pubDate>Wed, 08 Jul 2009 14:29:57 +0000</pubDate>
			<guid>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-646</guid>
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			<title>Good to hear!</title>
			<link>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-645</link>
			<description><![CDATA[@Sirisak I don't follow Netvault very closely, so it's good to hear that it has this functionality. @Juan Orlandini Kinda hard to know about undocumented features unless you're using them! Thanks for telling me about that.]]></description>
			<dc:creator>W. Curtis Preston</dc:creator>
			<pubDate>Wed, 08 Jul 2009 13:43:22 +0000</pubDate>
			<guid>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-645</guid>
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			<title>you can manage SM2T with backup apps</title>
			<link>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-644</link>
			<description><![CDATA[FYI - NBU can use the "set type = smtape" directive in the policy controling the backup. This must be put ahead of any volume paths. Believe it or not, this has been in NBU since 4.5. It's not documented on any NBU docs that I can find, but NetApp has this: https://now.netapp.com/Knowledgebase/solutionarea.asp?id=kb22417 Also, TSM 6.1 now allows you to control SM2T as well.]]></description>
			<dc:creator>Juan Orlandini</dc:creator>
			<pubDate>Wed, 08 Jul 2009 09:17:27 +0000</pubDate>
			<guid>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-644</guid>
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			<title>Sirisak says:</title>
			<link>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-643</link>
			<description><![CDATA[NetVault Backup has plugin to handle SnapMirror to Tape. http://www.bakbone.com/Product.aspx?id=1328]]></description>
			<dc:creator>Sirisak</dc:creator>
			<pubDate>Wed, 08 Jul 2009 01:00:30 +0000</pubDate>
			<guid>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-643</guid>
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			<title>Andrew Miller says:</title>
			<link>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-642</link>
			<description><![CDATA[Completely understood...and always glad to see discussion that fall in areas where I spend a lot of time. :-)]]></description>
			<dc:creator>Andrew Miller</dc:creator>
			<pubDate>Tue, 07 Jul 2009 17:30:19 +0000</pubDate>
			<guid>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-642</guid>
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			<title>Thanks</title>
			<link>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-641</link>
			<description><![CDATA[Like I said, it's something I should have known about before. It's not like I'm breaking the story or anything. Just bringing it up for discussion. (It does seem news to some.)]]></description>
			<dc:creator>W. Curtis Preston</dc:creator>
			<pubDate>Tue, 07 Jul 2009 17:27:48 +0000</pubDate>
			<guid>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-641</guid>
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			<title>Andrew Miller says:</title>
			<link>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-640</link>
			<description><![CDATA[Exactly right -- there are a few more wrinkles even actually. SnapVault (D2D product -- uses snapshots but allows keeping more snapshots at the destination than the source) as of ONTap 7.3 does support deduplication. Given SnapVault is based off of qtrees, support for deduplicated qtree SnapMirror can't be too far behind. On a practical level, while it is a drawback we find that we don't run into it as an issue very often (am a NetApp partner engineer). Technically speaking, if the replication happens at the volume level, things work swimmingly (since deduplication happens to the blocks at a volume level). Given qtree SnapMirror has to handle things at the file level (and is slower when there are tons of files), it doesn't work natively with a volume-level blocked deduplication. It's definitely a good point although in all fairness something that's been out there for a while (at least if you have good NetApp partner engineers to work with ;-).]]></description>
			<dc:creator>Andrew Miller</dc:creator>
			<pubDate>Tue, 07 Jul 2009 17:18:39 +0000</pubDate>
			<guid>http://www.backupcentral.com/mr-backup-blog-mainmenu-47/13-mr-backup-blog/250-netapp-asis.html#comment-640</guid>
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