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Date: Fri, 1 Nov 2013 17:00:25 -0400
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Subject: Re: Cassandra remove column using thrift
From: Jayadev Jayaraman <jdisalive@gmail.com>
To: user@cassandra.apache.org
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Hey guys,

False alarm, sorry about that. Our column-names are byte-concatenations of
short integers and we had been constructing the column names wrongly before
attempting a delete. We fixed the problem and we've been able to delete the
columns without issue.


On Fri, Nov 1, 2013 at 4:19 PM, Robert Coli <rcoli@eventbrite.com> wrote:

> On Fri, Nov 1, 2013 at 8:15 AM, Suruchi Deodhar <
> suruchi.deodhar@generalsentiment.com> wrote:
>
>> I provide the timestamp as the current time and
>> consistency_level=ConsistencyLevel.ALL.
>>
>> My questions wrt this are:
>> 1. Is there a log where I can check whether the remove command registered
>> successfully with the Cassandra nodes?
>> (In my case, the thrift call was successfully executed but my queries
>> still show data in the deleted column. I don't see logs in the system.log. )
>>
>
> This sounds unexpected. Have you tried deleting the same column via
> cassandra-cli or cqlsh (as applicable)? If so, does it work?
>
>
>> 2. Given that consistency_level=ConsistencyLevel.ALL, how much time does
>> cassandra take to commit the delete and cassandra client to get updated
>> data?
>>
>
> In my understanding, zero time. CL.ALL means all replicas have
> acknowledged the write, and therefore the write should be available in the
> memtables of all nodes.
>
> =Rob
>

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<div dir=3D"ltr">Hey guys,=A0<div><br></div><div style>False alarm, sorry a=
bout that. Our column-names are byte-concatenations of short integers and w=
e had been constructing the column names wrongly before attempting a delete=
. We fixed the problem and we&#39;ve been able to delete the columns withou=
t issue.=A0</div>
</div><div class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On Fri,=
 Nov 1, 2013 at 4:19 PM, Robert Coli <span dir=3D"ltr">&lt;<a href=3D"mailt=
o:rcoli@eventbrite.com" target=3D"_blank">rcoli@eventbrite.com</a>&gt;</spa=
n> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div class=3D"im">On Fri, N=
ov 1, 2013 at 8:15 AM, Suruchi Deodhar <span dir=3D"ltr">&lt;<a href=3D"mai=
lto:suruchi.deodhar@generalsentiment.com" target=3D"_blank">suruchi.deodhar=
@generalsentiment.com</a>&gt;</span> wrote:<br>
</div><div class=3D"gmail_extra">
<div class=3D"gmail_quote"><div class=3D"im"><blockquote class=3D"gmail_quo=
te" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"=
><div dir=3D"ltr"><div>I provide the timestamp as the current time and cons=
istency_level=3DConsistencyLevel.ALL.<br>

</div><div><br></div><div>My questions wrt this are:<br></div><div>1. Is th=
ere a log where I can check whether the remove command registered successfu=
lly with the Cassandra nodes?<br>
</div><div>(In my case, the thrift call was successfully executed but my qu=
eries still show data in the deleted column. I don&#39;t see logs in the sy=
stem.log. )<br></div></div></blockquote><div><br></div></div><div>This soun=
ds unexpected. Have you tried deleting the same column via cassandra-cli or=
 cqlsh (as applicable)? If so, does it work?</div>
<div class=3D"im">
<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div></div><d=
iv>2. Given that consistency_level=3DConsistencyLevel.ALL, how much time do=
es cassandra take to commit the delete and cassandra client to get updated =
data?<br>

</div></div></blockquote><div><br></div></div><div>In my understanding, zer=
o time. CL.ALL means all replicas have acknowledged the write, and therefor=
e the write should be available in the memtables of all nodes.</div><div>
<br>
</div><div>=3DRob</div></div></div></div>
</blockquote></div><br></div>

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