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April 25, 2007


Chris M Evans

Chuck, I commented on Optimizer last week and I'm currently running a poll to see how many people actually trust it to do the job. On the subject of neeting products like Optimizer in the first place, I think that current array designs make these products necessary. Although architecture is a "shared everything" disks are still stored on back-end loops and data is stored in discrete packets (e.g. hypers on EMC) which makes moving data around to balance performance a necessary evil. Perhaps we need a fundamentally better architecture where we move away from the requirement to map LUNs directly to physical drives and the array microcode writes data to the least busy part of the array on a dynamic basis. Thought Moshe was working on something like this (but perhaps not with EMC)?

Chuck Hollis

Hi Chris

I've found that there's a trust-building exercise with all dynamic optimization products (servers, storage, etc.).

Thankfully, Symm Optimizer has been out there long enough that you'll probably find more than a few people that trust it to do its magic in the background, but that trust relationship didn't happen in the first week!

As far as future architectures minimizing the need for data relocation, I would argue that we're seeing more dynamic range between disk alternatives, and not less.

This leads me to believe that -- at some level -- there will be a need to shuffle the data chunks from one place to another to optimize.

Now, that being said, I think there's huge room for improvement on how that's done, e.g. more granular chunks (as opposed to LUN slices), being able to do so quickly and without impacting production, and so on.

I think this is one area where our thoughts line up a bit!

The comments to this entry are closed.

Chuck Hollis

  • Chuck Hollis
    SVP, Oracle Converged Infrastructure Systems

    Chuck now works for Oracle, and is now deeply embroiled in IT infrastructure.

    Previously, he was with VMware for 2 years, and EMC for 18 years before that, most of them great.

    He enjoys speaking to customer and industry audiences about a variety of technology topics, and -- of course -- enjoys blogging.

    Chuck lives in Vero Beach, FL with his wife and four dogs when he's not traveling. In his spare time, Chuck is working on his second career as an aging rock musician.

    Warning: do not ever buy him a drink when there is a piano nearby.

    Note: these are my personal views, and aren't reviewed or approved by my employer.
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