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Date: Wed, 28 Mar 2012 22:14:36 +1100
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Subject: Re: tombstones problem with 1.0.8
From: Ross Black <ross.w.black@gmail.com>
To: user@cassandra.apache.org
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Radim,

We are only deleting columns.  *Rows are never deleted.*
We are continually adding new columns that are then deleted. * Existing
columns (deleted or otherwise) are never updated.
*
Ross*

*
On 28 March 2012 13:51, John Laban <john@pagerduty.com> wrote:

> (Radim:  I'm assuming you mean "do not delete already deleted columns" as
> Ross doesn't delete his rows.)
>
> Just to be clear about Ross' situation:  he continually inserts columns
> and later deletes columns from the same set of rows.  As long as he *
> doesn't* *keep deleting already-deleted columns* (which refreshes the
> tombstone on them), the deleted columns *should* get cleaned up, right?
>  (Even though the row itself continually gets new columns inserted and
> other columns deleted?)
>
> Thanks,
> John
>
>
>
>
> On Tue, Mar 27, 2012 at 2:21 AM, Radim Kolar <hsn@filez.com> wrote:
>
>> Dne 27.3.2012 11:13, Ross Black napsal(a):
>>
>>  Any pointers on what I should be looking for in our application that
>>> would be stopping the deletion of tombstones?
>>>
>> do not delete already deleted rows. On read cassandra returns deleted
>> rows as empty in range slices.
>>
>
>

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Radim,<br><br>We are only deleting columns.=A0 <b>Rows are never deleted.</=
b><br>We are continually adding new columns that are then deleted.=A0<b> Ex=
isting columns (deleted or otherwise) are never updated.<br></b><br>Ross<b>=
<br>
<br></b><br><div class=3D"gmail_quote">On 28 March 2012 13:51, John Laban <=
span dir=3D"ltr">&lt;<a href=3D"mailto:john@pagerduty.com">john@pagerduty.c=
om</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"marg=
in:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1e=
x">
<div>(Radim: =A0I&#39;m assuming you mean &quot;do not delete already delet=
ed columns&quot; as Ross doesn&#39;t delete his rows.)</div><div><br></div>=
Just to be clear about Ross&#39; situation: =A0he continually inserts colum=
ns and later deletes columns from the same set of rows. =A0As long as he <b=
>doesn&#39;t</b>=A0<i>keep deleting already-deleted columns</i>=A0(which re=
freshes the tombstone on them), the deleted columns <b>should</b> get clean=
ed up, right? =A0(Even though the row itself continually gets new columns i=
nserted and other columns deleted?)<div>


<br></div><div>Thanks,</div><div>John<div><div class=3D"h5"><br><div><br></=
div><div><br></div><br><div class=3D"gmail_quote">On Tue, Mar 27, 2012 at 2=
:21 AM, Radim Kolar <span dir=3D"ltr">&lt;<a href=3D"mailto:hsn@filez.com" =
target=3D"_blank">hsn@filez.com</a>&gt;</span> wrote:<br>


<blockquote class=3D"gmail_quote" style=3D"margin:0pt 0pt 0pt 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">Dne 27.3.2012 11:13, Ross=
 Black napsal(a):<div><br>
<blockquote class=3D"gmail_quote" style=3D"margin:0pt 0pt 0pt 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">
Any pointers on what I should be looking for in our application that would =
be stopping the deletion of tombstones?<br>
</blockquote></div>
do not delete already deleted rows. On read cassandra returns deleted rows =
as empty in range slices.<br>
</blockquote></div><br></div></div></div>
</blockquote></div><br>

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