Matt Simmons
Chris Cowley
@standaloneSA this argument annoys me, there is a blog post coming on the subject soon.
So what are the modern arguments for / against hardware / software RAID? I don't get out much. #sysadmin
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@chriscowleyunix you do it, I'll link to it. :-) -
@standaloneSA Voila: http://is.gd/BaBkmH Question: do you self-Reddit your posts, or is that frowned upon? -
@chriscowleyunix I'd be happy to post it. You'd get way more traffic tomorrow 9am-1pm EDT though. Want me to wait? -
@standaloneSA Feel free, like I said, is self-posting frowned upon on /r/sysadmin? - View other replies
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@chriscowleyunix It's not entirely frowned upon. Contributing only your own blog entries is, though. That's considered "blogspam".
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@standaloneSA Doesn't software RAID add more overhead? Perhaps not with multicore. -
@fferret it does, but it's minimal, and honestly, we are almost never pegging modern processors, like you suggested.
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@standaloneSA we should talk about software raid in the cloud space. Stripe over multiple disks on a single instance for improved IO. -
@chuhnk interesting. I hadn't thought of that. Have you tried it with EBS? -
@standaloneSA not personally tried this but there are some interesting old posts out there http://victortrac.com/blog/2010/01/02/ec2-ephemeral-disks-vs-ebs-volumes-in-raid/ …http://www.gabrielweinberg.com/blog/2011/05/raid0-ephemeral-storage-on-aws-ec2.html …
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@standaloneSA +1 for ZFS if you care about the data. If not, SW RAID is portable, HW RAID is faster (til it screws up). So... ZFS.#sysadmin -
@standaloneSA we want integrity from end-to-end checksumming and as little black-box goo between apps & data, i.e. "#ZFS or GTFO." :) -
@standaloneSA software: no rational ones against, hardware: card is SPF, performance ofteen inferior, but people just "feel" it is better -
@standaloneSA I vastly prefer software RAID because it is far more amenable to inspection and fixing if and when things go wrong. -
@standaloneSA which is to say, ZFS effing rocks :) -
@standaloneSA My view is that the performance advantages of hardware RAID are usually oversold. Measure before you believe them. -
@standaloneSA software, because you can't puppetize hardware -
@standaloneSA most have to do with huge rebuild times on >1TB spindles; also lower perf using sw instead of hw -
@standaloneSA just migrate to raidz and be done with it
fferret
Asim Aslam
(((Nahum Shalman)))
Eric Sproul
Chris Siebenmann
Douglas J Hunley
Ben Cotton
Jim Millard
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