Duplicity to Amazon S3 on FreeBSD: Building on the work of others
(This post adds only a couple small details to work described at randys.org and cenolan.com – go there for background on this post and useful scripts for automated Duplicity backup to S3.) First off,...
View ArticleRunning NetApp’s aggrSpaceCheck without turning on RSH
When upgrading a NetApp filer from a pre-7.3 release to 7.3, metadata is apparently moved from within the FlexVol into the containing aggregate. If your aggregate is tight on space – more than 96% full...
View ArticleReplacing a Failed NetApp Drive with an Un-zeroed Spare
Jason Boche has a post on the method he used to replace a failed drive on a filer with an un-zeroed spare (transferred from a lab machine); my procedure was a little different. In this example, I’ll be...
View ArticleFilling in the Missing Parts of NetApp’s API
Late last year, NetApp released long-overdue Python and Ruby support in their SDK, officially known as the NetApp Manageability SDK. The SDK download is – oddly and unfortunately – still buried behind...
View Articlefio vs. ZFS compression
Summary: When testing ZFS read performance with fio, compression settings on the file system may cause you to test cache performance instead of physical disk performance. Background: Testing was done...
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VMware’s Comparison of Storage Protocol Performance
VMware has just released a paper entitled Comparison of Storage Protocol Performance (seen at Scale the Mind and blog.scottlowe.org); maybe this will help deflate some of the too-often repeated...
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On Parity Lost
I just finished reading a paper presented at FAST ’08 from the University of Wisconsin, Madison (including the first and senior authors) and NetApp: Parity Lost and Parity Regained. The paper discusses...
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Amazon Elastic Block Store is out!
Amazon’s much-awaited Elastic Block Store for EC2 is out this morning; I’m excited to give this a try. A couple downers from the announcement: The pricing is somewhat high – $0.10 per allocated GB per...
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Practical Limits of NetApp Deduplication
I’ve blogged before about the limits of NetApp’s A-SIS (Deduplication). In practical use, however, those limits can be even lower – here’s why: Suppose, for example, that you have a FAS2050; the...
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