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May 21, 2013

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Howard Marks

Chuck,

I agree Virsto is a lot more impressive than you would think at first glance. However it's really more of a clustered file system than a volume manager.

The key for me isn't really the acceleration, though that can be nice, but the per-VM snapshots. I can take an application consistant snap hourly and keep a day or two of them around without the performance penalty inferior snap providers impose.

Disclaimer: Virsto was a client before the VMware acquisition.

Chuck Hollis

Hi Howard

For some reason, your comment went into the spam folder and I had to go fish it out ...

Regarding taxonomy? I remember the story behind Hadacol (an alcohol-laden patent medicine) was that they had-to-call it something.

While you're quite correct in that it's a clustered file system, it can't really be used as one: doesn't support full POSIX, doesn't support NFS or CIFS. The only purpose of the Virsto file system is to support VMDK volumes, which is why I elected to call it a volume manager.

The snaps are what really shine -- agreed. But during performance testing, there were a number of profiles where it did quite well vs. native ESX+array. It also seems to be an extremely efficient users of a very small amount of SSDs.

Thanks


-- Chuck

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Chuck Hollis


  • Chuck Hollis
    Chief Strategist, VMware SAS BU
    @chuckhollis

    Chuck has recently joined VMware in a new role, and is quite enthused!

    Previously, he was with EMC for 18 years, 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 Holliston, MA with his wife, three kids and four dogs when he's not travelling. In his spare time, Chuck is working on his second career as an aging rock musician.

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