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From Todd Lipcon <t...@cloudera.com>
Subject Re: Heads up wrt last upgrade-able version on 0.23
Date Sat, 24 Mar 2012 00:03:19 GMT
Seems reasonable to me. I haven't seen anyone running versions <0.18.3
in the last 2-3 years, and given the growth in Hadoop usage, I'd say
95+% of the user community didn't even start using Hadoop until
0.20.x. 0.18 seems like a reasonable (and still conservative) cut-off


On Fri, Mar 23, 2012 at 4:43 PM, Eli Collins <eli@cloudera.com> wrote:
> Hey gang,
> I filed HDFS-3137 so that the 0.23 releases would only support
> upgrades from Hadoop version 0.18 or later.  People on versions before
> 0.18 (don't think there are many, if any, people running these) would
> have to upgrade to a version like 1.0 and then upgrade again from
> there if they wanted to move to 0.23.  I think that should be fine but
> wanted to call it out here, give people an opportunity to chime in on
> the jira.
> The motivation is that I'd like to do some HDFS cleanup to enable
> another change that would break v0.17 and earlier.
> Thanks,
> Eli

Todd Lipcon
Software Engineer, Cloudera

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