HDP - Response to Marc Farley

Below are some notes to the above videos (especially for those in quiet offices who can’t watch the video yet).   I posted the video in response to Marc Farleys recent video and comments on Hitachi Dynamic Provisioning, as well as other comments that have been made in blogs and on twitter etc….. All of these comments have been slating HDP for being chubby and the likes. Hopefully this post and the video will help set the record straight.   The 42MB page   On the topic of HDP being chubby. While I…

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Dynamic Provisioning: No mouldy beans for me thanks!

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The Full "Extent" of Dynamic Provisioning

Recently Hitachi added Zero Page Reclaim functionality to its Dynamic Provisioning (DP) on the USP V.  This feature is one from a fairly long list of enhancements on most peoples DP wish list.  Other improvements are hopefully in the pipeline.  In this post I'm going to talk about Zero Page Reclaim as well as a possible interesting shift towards the "extent" as basic unit of the entire array...... Dynamic Provisioning 101 (I'll keep this bit short) When I talk about dynamic provisioning (DP) I am also referring to Thin Provisioning.......... Under…

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Dynamic Provisioning: Zero Page Reclaim

Check out the below links for info direct from HDS on the Zero Page Reclaim feature that works with Dynamic Provisioning as of ucode 60-04-04 on the USP V - Webex playback - requires registration PDF of the PPT accompanying the above Webex session - If the above pages move, you can see all publically available WebTech sessions from www.hds.com/webtech On the Webex session there is also mention of the anticipated availability of being able to dynamically re-balance page distribution within a Pool.  This is another feature that lots of people have talked to me about, basically…

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Dynamic Provisioning: v1.2 of Unofficial Best Practice guide available

As stated in the title, version 1.2 of the HDP/ThP Unofficial Best Practice Guide is available for download. New/updated in this version are - Two page section on theory.  Not quite a deep dive but hopefully of use. Updates and clarifications on availability of dynamic expansion of DP-VOLs as of ucode v04a. Addition of new Zero Page Reclamation functionality. Thoughts on multiple Pool. Updated comments on Heterogeneous Pools. ........... Many thanks to everybody reading and using the document, Im amazed at how widely it is circulating among HDS and HP customers.  Please feel free to pass…

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Dynamic Provisioning: Best Practice Guide (unofficial)

A while ago I put together an HDP/ThP Cheat Sheet come Best Practice Guide for a large UK financial house.  I mentioned it recently on the HDS and HP storage forums and as a result have had several requests for it. As a result of positive feedback, I have worked on it while at home in the evenings and believe it is now at a good enough standard to make available for anyone to download. Please note though, I do not currently work for Hitachi, HDS or HP so am therefore not an authority on  the USPV…

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Dynamic Provisioning: What's with V-VOL Groups?

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