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From Jack Krupansky <jack.krupan...@gmail.com>
Subject Re: UML sequence diagrams on Wiki for explaining read/write path
Date Mon, 30 Nov 2015 16:56:11 GMT
Great stuff!

You wrote "When the replica node comes back online the coordinator node
will send the data to the replica node", which is partially true - if the
replica comes back online within the timeout window of three hours. So, you
probably want to say something like:

"If the replica node comes back online within the hinted handoff window the
coordinator node will send the data to the replica node, otherwise the
replica node will need to be repaired."

And maybe mention the configuration of the window. Change "The data is
stored for a default period of 3 hours" to "The data is stored for a
default period of 3 hours, configurable using the
max_hint_window_in_ms property
in cassandra.yaml."

-- Jack Krupansky

On Mon, Nov 30, 2015 at 2:24 AM, Michael Edge <edge.michael@gmail.com>
wrote:

> Write path docs updated on Wiki - please review diagram/text and let me
> have your comments (or update text in place).
>
> https://wiki.apache.org/cassandra/WritePathForUsers
>
> Cheers,
>
> Michael
>
> On 26 November 2015 at 11:25, Michael Shuler <michael@pbandjelly.org>
> wrote:
>
> > On 11/25/2015 07:36 PM, Michael Edge wrote:
> > > I'd like to update the read/write path description on the wiki (see
> link
> > > below) by adding a couple of UML sequence diagrams I drew a while ago.
> I
> > > think they are much better than long textual descriptions for
> describing
> > > the order of operations on components. Before publishing them I'd
> prefer
> > a
> > > knowledgeable volunteer to review them to ensure they are accurate.
> > >
> > > Let me know if you're interested and I'll send you a copy.
> > >
> > > https://wiki.apache.org/cassandra/ArchitectureOverview
> >
> > I don't think the mailing list likes attachments, so throw them up on a
> > web server somewhere and send the list link(s) to your diagrams.
> > Alternatively, go ahead and post them on the wiki and ask for feedback.
> >
> > --
> > Kind regards,
> > Michael
> >
>

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