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From Les Hazlewood <>
Subject Re: 99.999% uptime - Operations Best Practices?
Date Thu, 23 Jun 2011 00:31:57 GMT
Hi Thoku,

You were able to more concisely represent my intentions (and their
reasoning) in this thread than I was able to do so myself.  Thanks!

On Wed, Jun 22, 2011 at 5:14 PM, Thoku Hansen <> wrote:

> I think that Les's question was reasonable. Why *not* ask the community for
> the 'gotchas'?
> Whether the info is already documented or not, it could be an opportunity
> to improve the documentation based on users' perception.
> The "you just have to learn" responses are fair also, but that reminds me
> of the days when running Oracle was a black art, and accumulated wisdom made
> DBAs irreplaceable.

Yes, this was my initial concern.  I know that Cassandra is still young, and
I expect this to be the norm for a while, but I was hoping to make that
process a bit easier (for me and anyone else reading this thread in the

Some recommendations *are* documented, but they are dispersed / stale /
> contradictory / or counter-intuitive.
> Others have not been documented in the wiki nor in DataStax's doco, and are
> instead learned anecdotally or The Hard Way.
> For example, whether documented or not, some of the 'gotchas' that I
> encountered when I first started working with Cassandra were:
> * Don't use OpenJDK. Prefer the Sun JDK. (Wiki says this<>
> , Jira says that <>).
> * Its not viable to run without JNA installed.
> * Disable swap memory.
> * Need to run nodetool repair on a regular basis.
> I'm looking forward to Edward Capriolo's Cassandra book<>
> Les will probably find helpful.

Thanks for linking to this.  I'm pre-ordering right away.

And thanks for the pointers, they are exactly the kind of enumerated things
I was looking to elicit.  These are the kinds of things that are hard to
track down in a single place.  I think it'd be nice for the community to
contribute this stuff to a single page ('best practices', 'checklist',
whatever you want to call it).  It would certainly make things easier when
getting started.

Thanks again,


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