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From Ran Tavory <ran...@gmail.com>
Subject Re: how to delete data
Date Sat, 01 May 2010 21:05:26 GMT
alright, I've uploaded another patch with these updates:

https://issues.apache.org/jira/secure/attachment/12443391/CASSANDRA-531.patch

In this patch I completed all the thrift wiring work, including internal
messaging to all hosts in the cluster.
The patch includes all previous changes, no need to use the previous
patches.
I've changed the truncate method definition in cassandra.thrift and removed
the timestamp from the truncation signature since it's not used.
More changes are in the patch, including system test, thrift and messaging
implementation, taking a snapshot and deleting the actual files.

TODO:
Add truncate to the JMX interface
Add truncate to nodetool
Add system tests to test nodetool + JMX


On Wed, Apr 28, 2010 at 2:53 PM, Gary Dusbabek <gdusbabek@gmail.com> wrote:

> You bet.  Take a look at CFS.snapshot().  You basically supply a name
> and a hard link is created.
>
> Gary.
>
> On Wed, Apr 28, 2010 at 06:49, Ran Tavory <rantav@gmail.com> wrote:
> > Thanks Gary, can you send a code pointer how snapshot is done?
> >
> > On Wed, Apr 28, 2010 at 2:46 PM, Gary Dusbabek <gdusbabek@gmail.com>
> wrote:
> >>
> >> I think it's in the right direction.  You've handled the memtable,
> >> sstables and commit log.  Other than what's listed in the todos, I
> >> can't think of anything else.
> >>
> >> As for the files, it's probably best to snapshot before truncating.
> >> That's the approach I was encouraged to take for the DROP CF
> >> operation.
> >>
> >> Gary.
> >>
> >> On Wed, Apr 28, 2010 at 03:59, Ran Tavory <rantav@gmail.com> wrote:
> >> > Finally I found the time to start this work...
> >> > It's half baked, but I listed all the missing parts so I'll continue
> the
> >> > work if the patch is good so far. No need to apply the patch, just
> have
> >> > look
> >> > and lmk if I'm at the right direction
> >> >
> >> >
> https://issues.apache.org/jira/secure/attachment/12443055/CASSANDRA-531.patch
> >> >
> >> >
> >> > <
> https://issues.apache.org/jira/secure/attachment/12443055/CASSANDRA-531.patch
> >
> >> > Thanks
> >> >
> >> > On Thu, Mar 25, 2010 at 9:32 PM, Jonathan Ellis <jbellis@gmail.com>
> >> > wrote:
> >> >
> >> >> Commented on the Jira issue.
> >> >>
> >> >> Curious how badly out of date that patch is now. :)
> >> >>
> >
> >
>

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